[opensuse] Advice on gigabit NIC
I'm thinking of upgrading my NIC to a gigabit model, and read elsewhere that Intel devices are usually compatible with linux (drivers in the kernel). Amazon UK are selling the Intel Gigabit CT Desktop Adapter. The product specification states: 'Support for most network operating systems' but does not mention linux specifically. Does anyone have experience with this model, or any other recommendations? Many thanks Bob -- Bob Williams System: Linux 3.4.11-2.16-desktop Distro: openSUSE 12.2 (x86_64) with KDE Development Platform: 4.9.5 "release 3" Uptime: 06:00am up 8 days 13:12, 5 users, load average: 0.16, 0.28, 0.81 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On Wed, 2013-01-23 at 08:13 +0000, Bob Williams wrote:
I'm thinking of upgrading my NIC to a gigabit model, and read elsewhere that Intel devices are usually compatible with linux (drivers in the kernel).
Amazon UK are selling the Intel Gigabit CT Desktop Adapter. The product specification states:
'Support for most network operating systems' but does not mention linux specifically.
Does anyone have experience with this model, or any other recommendations?
We use intel GBit NICs exclusively. They work great. I have no reservations about using them. We often use 4-port cards. Intel do package these in many different ways. The main thing we ensure is that the MTU can be increased (in our case from 1500 to 9216). This ensures things like our GigE Vision cameras keep up. I would imagine that if you are just looking for a good GBit NIC, the CT Desktop would work fine. We have never had to install the intel-supplied drivers. The kernel-supplied drivers seem to work for all cards we have. I think (may be wrong) that the intel-supplied drivers eventually become the kernel-supplied drivers. So as long as your kernel is not very old and your card very new, it should be enough to put the card in the computer.
Many thanks
Bob -- Bob Williams System: Linux 3.4.11-2.16-desktop Distro: openSUSE 12.2 (x86_64) with KDE Development Platform: 4.9.5 "release 3" Uptime: 06:00am up 8 days 13:12, 5 users, load average: 0.16, 0.28, 0.81
Yours sincerely, Roger Oberholtzer Ramböll RST / Systems Office: Int +46 10-615 60 20 Mobile: Int +46 70-815 1696 roger.oberholtzer@ramboll.se ________________________________________ Ramböll Sverige AB Krukmakargatan 21 P.O. Box 17009 SE-104 62 Stockholm, Sweden www.rambollrst.se -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Roger Oberholtzer wrote:
On Wed, 2013-01-23 at 08:13 +0000, Bob Williams wrote:
I'm thinking of upgrading my NIC to a gigabit model, and read elsewhere that Intel devices are usually compatible with linux (drivers in the kernel).
Amazon UK are selling the Intel Gigabit CT Desktop Adapter. The product specification states:
'Support for most network operating systems' but does not mention linux specifically.
Does anyone have experience with this model, or any other recommendations?
We use intel GBit NICs exclusively. They work great. I have no reservations about using them. We often use 4-port cards.
Intel do package these in many different ways. The main thing we ensure is that the MTU can be increased (in our case from 1500 to 9216). This ensures things like our GigE Vision cameras keep up.
Support for jumbo-frames is a good point (if you need it) - not all GigE interfaces support them. I have some servers with dual on-board GigE interfaces = Intel 82573L and 82573V - I can't remember exactly, but I'm pretty certain only one of those does jumbo-frames. -- Per Jessen, Zürich (-1.5°C) http://www.dns24.ch/ - free DNS hosting, made in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On Wed, 2013-01-23 at 10:39 +0100, Per Jessen wrote:
Support for jumbo-frames is a good point (if you need it) - not all GigE interfaces support them. I have some servers with dual on-board GigE interfaces = Intel 82573L and 82573V - I can't remember exactly, but I'm pretty certain only one of those does jumbo-frames.
We have SuperMicro MBs with the dual ethernet ports using intel chips. On most of them, one will allow jumbo frames and the other will not. Talk about cutting costs... Yours sincerely, Roger Oberholtzer Ramböll RST / Systems Office: Int +46 10-615 60 20 Mobile: Int +46 70-815 1696 roger.oberholtzer@ramboll.se ________________________________________ Ramböll Sverige AB Krukmakargatan 21 P.O. Box 17009 SE-104 62 Stockholm, Sweden www.rambollrst.se -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Roger Oberholtzer wrote:
On Wed, 2013-01-23 at 10:39 +0100, Per Jessen wrote:
Support for jumbo-frames is a good point (if you need it) - not all GigE interfaces support them. I have some servers with dual on-board GigE interfaces = Intel 82573L and 82573V - I can't remember exactly, but I'm pretty certain only one of those does jumbo-frames.
We have SuperMicro MBs with the dual ethernet ports using intel chips. On most of them, one will allow jumbo frames and the other will not. Talk about cutting costs...
The servers I mentioned also have Supermicro boards - PDSML LN2. -- Per Jessen, Zürich (0.1°C) http://www.dns24.ch/ - free DNS hosting, made in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Bob Williams wrote:
I'm thinking of upgrading my NIC to a gigabit model, and read elsewhere that Intel devices are usually compatible with linux (drivers in the kernel).
I guess you've also got a gigabit switch?
Amazon UK are selling the Intel Gigabit CT Desktop Adapter. The product specification states:
'Support for most network operating systems' but does not mention linux specifically.
Does anyone have experience with this model, or any other recommendations?
I have plenty of Intel and Broadcom GigE device, never had any problems with them (except some elderly Broadcom chipsets). -- Per Jessen, Zürich (-2.6°C) http://www.dns24.ch/ - free DNS hosting, made in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 23/01/13 08:59, Per Jessen wrote:
Bob Williams wrote:
I'm thinking of upgrading my NIC to a gigabit model, and read elsewhere that Intel devices are usually compatible with linux (drivers in the kernel).
I guess you've also got a gigabit switch?
Not sure what you mean. The card will connect to a Draytek Vigor 2800v ADSL2/2+ router. Bob -- Bob Williams System: Linux 3.4.11-2.16-desktop Distro: openSUSE 12.2 (x86_64) with KDE Development Platform: 4.9.5 "release 3" Uptime: 06:00am up 8 days 13:12, 5 users, load average: 0.16, 0.28, 0.81 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Bob Williams wrote:
On 23/01/13 08:59, Per Jessen wrote:
Bob Williams wrote:
I'm thinking of upgrading my NIC to a gigabit model, and read elsewhere that Intel devices are usually compatible with linux (drivers in the kernel).
I guess you've also got a gigabit switch?
Not sure what you mean. The card will connect to a Draytek Vigor 2800v ADSL2/2+ router.
Bob
Then there's no point in getting a gigabit NIC - your ADSL line doesn't (presumably) give you more then 24Mbit/s? A gigabit NIC will only be useful if whatever it connects to (usually a switch) also does gigabit speeds. -- Per Jessen, Zürich (-1.5°C) http://www.dns24.ch/ - free DNS hosting, made in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 01/23/2013 10:35 AM, Per Jessen wrote:
Bob Williams wrote:
On 23/01/13 08:59, Per Jessen wrote:
Bob Williams wrote: I guess you've also got a gigabit switch?
Not sure what you mean. The card will connect to a Draytek Vigor 2800v ADSL2/2+ router.
Then there's no point in getting a gigabit NIC - your ADSL line doesn't (presumably) give you more then 24Mbit/s?
A gigabit NIC will only be useful if whatever it connects to (usually a switch) also does gigabit speeds.
What about other devices connected to the same router? I didn't find specs for that router, but if it has a gigabit NIC and other devices, too, then upgrading *will* make sense. Have a ncie day, Berny -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 23/01/13 09:43, Bernhard Voelker wrote:
On 01/23/2013 10:35 AM, Per Jessen wrote:
Bob Williams wrote:
On 23/01/13 08:59, Per Jessen wrote:
Bob Williams wrote: I guess you've also got a gigabit switch?
Not sure what you mean. The card will connect to a Draytek Vigor 2800v ADSL2/2+ router.
Then there's no point in getting a gigabit NIC - your ADSL line doesn't (presumably) give you more then 24Mbit/s?
A gigabit NIC will only be useful if whatever it connects to (usually a switch) also does gigabit speeds.
What about other devices connected to the same router? I didn't find specs for that router, but if it has a gigabit NIC and other devices, too, then upgrading *will* make sense.
Have a ncie day, Berny
On the LAN, there is a wireless access point connected, which provides connectivity to two laptops, printer, and smartphone. The WAN side is a copper cabled POTS line a few km from the exchange. The reason I wanted to 'upgrade' this machine was that it seems very slow compared to the two laptops when interacting online. For example, although they have a different set of repositories, this machine crawls through the process of updating the repos compared to the laptops. It is using the onboard nVidia MCP51 Ethernet controller, using the forcedeth kernel driver. The CPU is Intel Core2 Quad CPU Q9400 running at 2.66GHZ, with 8Gb RAM. Running openSUSE 12.2 x86_64. Bob -- Bob Williams System: Linux 3.4.11-2.16-desktop Distro: openSUSE 12.2 (x86_64) with KDE Development Platform: 4.9.5 "release 3" Uptime: 06:00am up 8 days 13:12, 5 users, load average: 0.16, 0.28, 0.81 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Bob Williams wrote:
On 23/01/13 09:43, Bernhard Voelker wrote:
On 01/23/2013 10:35 AM, Per Jessen wrote:
Bob Williams wrote:
On 23/01/13 08:59, Per Jessen wrote:
Bob Williams wrote: I guess you've also got a gigabit switch?
Not sure what you mean. The card will connect to a Draytek Vigor 2800v ADSL2/2+ router.
Then there's no point in getting a gigabit NIC - your ADSL line doesn't (presumably) give you more then 24Mbit/s?
A gigabit NIC will only be useful if whatever it connects to (usually a switch) also does gigabit speeds.
What about other devices connected to the same router? I didn't find specs for that router, but if it has a gigabit NIC and other devices, too, then upgrading *will* make sense.
Have a ncie day, Berny
On the LAN, there is a wireless access point connected, which provides connectivity to two laptops, printer, and smartphone.
Hi Bob, It looks like it has a built-in 4-port 10/100 hub or switch too, but when it's not gigabit, connecting a gigabit interface will only make the latter run in 100Mbit mode.
The reason I wanted to 'upgrade' this machine was that it seems very slow compared to the two laptops when interacting online. For example, although they have a different set of repositories, this machine crawls through the process of updating the repos compared to the laptops.
That sounds much more like a network configuration problem.
It is using the onboard nVidia MCP51 Ethernet controller, using the forcedeth kernel driver. The CPU is Intel Core2 Quad CPU Q9400 running at 2.66GHZ, with 8Gb RAM. Running openSUSE 12.2 x86_64.
That board sounds sufficiently modern, it must have gigabit support. -- Per Jessen, Zürich (0.1°C) http://www.dns24.ch/ - free DNS hosting, made in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 01/23/2013 11:34 AM, Per Jessen wrote:
Bob Williams wrote:
The reason I wanted to 'upgrade' this machine was that it seems very slow compared to the two laptops when interacting online. For example, although they have a different set of repositories, this machine crawls through the process of updating the repos compared to the laptops.
That sounds much more like a network configuration problem.
Maybe the auto-negotiation failed, and the connection dropped down to 10Mbit/s. I've seen this with 1GBit/s cards when the next router/switch was only 100MBit/s. Have a nice day, Berny -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On Wed, 23 Jan 2013 12:55:44 +0100
Bernhard Voelker
I've seen this with 1GBit/s cards when the next router/switch was only 100MBit/s.
Compatibilities :) I have Dell Inspiron 545 where onboard network adapter 10/100 Mbit turns off when connected to gigbit switch Netgear GS605, and it happens in Windows and Linux. I have to use ethtool to tell explicitly card what speed it should use, or remove, load driver, and then restart network, or turn first computer on, then wait, then turn switch on. Two different addon cards work fine. -- Regards, Rajko. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 23/01/13 10:07, Bob Williams wrote:
On 01/23/2013 10:35 AM, Per Jessen wrote:
Bob Williams wrote:
On 23/01/13 08:59, Per Jessen wrote:
Bob Williams wrote: [...] [...] [...] [...] [...] The reason I wanted to 'upgrade' this machine was that it seems very slow compared to the two laptops when interacting online. For example, although they have a different set of repositories, this machine crawls
On 23/01/13 09:43, Bernhard Voelker wrote: through the process of updating the repos compared to the laptops. [...]
I solved the problem by disabling ipv6 in Network Settings. Nothing to do with my hardware. Thank you all for your advice, which prevented me going up a blind alley. Bob -- Bob Williams System: Linux 3.4.11-2.16-desktop Distro: openSUSE 12.2 (x86_64) with KDE Development Platform: 4.9.5 "release 3" Uptime: 06:00am up 8:55, 3 users, load average: 0.11, 0.13, 0.13 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Bob Williams wrote:
I solved the problem by disabling ipv6 in Network Settings. Nothing to do with my hardware. Thank you all for your advice, which prevented me going up a blind alley.
I'm curious as to why some people have problems with IPv6 turned on. It happens in Windows too. I have never had to turn it off and, in fact, have been running IPv6 for almost 3 years. Why did you pick that? Did something else get changed? What about the other computers, which you said were running better? -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 24/01/13 13:01, James Knott wrote:
Bob Williams wrote:
I solved the problem by disabling ipv6 in Network Settings. Nothing to do with my hardware. Thank you all for your advice, which prevented me going up a blind alley.
I'm curious as to why some people have problems with IPv6 turned on. It happens in Windows too. I have never had to turn it off and, in fact, have been running IPv6 for almost 3 years. Why did you pick that?
Something I heard, possibly on this list. Can't remember when.
Did something else get changed?
Not that I know of What about the other computers, which you
said were running better?
Both have IPv6 disabled. -- Bob Williams System: Linux 3.4.11-2.16-desktop Distro: openSUSE 12.2 (x86_64) with KDE Development Platform: 4.9.5 "release 3" Uptime: 06:00am up 8:55, 3 users, load average: 0.11, 0.13, 0.13 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Bob Williams wrote:
Both have IPv6 disabled.
So, what will you do when your ISP switches to IPv6? That's already happening in some areas. For example Comcast in the U.S. is switching it's entire network to IPv6 and providing IPv4 via 4in6 tunneling and large scale NAT. My own ISP has recently started providing IPv6, though I obtain my connection elsewhere. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 24/01/13 13:37, James Knott wrote:
Bob Williams wrote:
Both have IPv6 disabled.
So, what will you do when your ISP switches to IPv6? That's already happening in some areas. For example Comcast in the U.S. is switching it's entire network to IPv6 and providing IPv4 via 4in6 tunneling and large scale NAT. My own ISP has recently started providing IPv6, though I obtain my connection elsewhere.
Cross that bridge when I get to it. -- Bob Williams System: Linux 3.4.11-2.16-desktop Distro: openSUSE 12.2 (x86_64) with KDE Development Platform: 4.9.5 "release 3" Uptime: 06:00am up 8:55, 3 users, load average: 0.11, 0.13, 0.13 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 24/01/13 15:16, James Knott wrote:
Bob Williams wrote:
Cross that bridge when I get to it.
Perhaps, as an experiment, you could re-enable IPv6 and see if the problem returns.
Well, it was definitely slower reloading the repos in YaST than with IPv6 disabled, but faster than earlier today, but obviously the repos had recently been refreshed. Ill try again later. Bob -- Bob Williams System: Linux 3.4.11-2.16-desktop Distro: openSUSE 12.2 (x86_64) with KDE Development Platform: 4.9.5 "release 3" Uptime: 06:00am up 8:55, 3 users, load average: 0.11, 0.13, 0.13 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Bob Williams wrote:
Well, it was definitely slower reloading the repos in YaST than with IPv6 disabled, but faster than earlier today, but obviously the repos had recently been refreshed. Ill try again later.
Is this the only thing that it affects? What about other things on the Internet? -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 24/01/13 15:54, James Knott wrote:
Bob Williams wrote:
Well, it was definitely slower reloading the repos in YaST than with IPv6 disabled, but faster than earlier today, but obviously the repos had recently been refreshed. Ill try again later.
Is this the only thing that it affects? What about other things on the Internet?
These things tend to be subjective. YaST's repo refresh is a test I can do easily on each machine. Trying to be objective, Speedtest.net says I've got 2.34 Mb/s download speed, while Broadband speedchecker shows 4.52 Mb/s immediately afterwards. YaST repo refresh just took 1m 20s Bob -- Bob Williams System: Linux 3.4.11-2.16-desktop Distro: openSUSE 12.2 (x86_64) with KDE Development Platform: 4.9.5 "release 3" Uptime: 06:00am up 8:55, 3 users, load average: 0.11, 0.13, 0.13 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
James Knott wrote:
Bob Williams wrote:
I solved the problem by disabling ipv6 in Network Settings. Nothing to do with my hardware. Thank you all for your advice, which prevented me going up a blind alley.
I'm curious as to why some people have problems with IPv6 turned on.
Because some ISPs have their equipment incorrectly configured. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Dave Howorth wrote:
I'm curious as to why some people have problems with IPv6 turned on. Because some ISPs have their equipment incorrectly configured.
If they only provide IPv4, why is that an issue? If there's no IPv6 route out of a computer or local network, then it shouldn't affect IPv4. Does BW have IPv6 available? Every computer with a modern OS should have, at least, link local IPv6. In fact, Windows 7 uses it exclusively for the "Home Group" peer to peer networking. A computer shouldn't try to use IPv6 unless it's available for reaching the destination and the DNS returns AAAA records. Even then, once a TCP connection is established, IPv6 should not even be a factor. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 24/01/13 14:59, James Knott wrote:
Dave Howorth wrote:
I'm curious as to why some people have problems with IPv6 turned on. Because some ISPs have their equipment incorrectly configured.
If they only provide IPv4, why is that an issue? If there's no IPv6 route out of a computer or local network, then it shouldn't affect IPv4. Does BW have IPv6 available? Every computer with a modern OS should have, at least, link local IPv6. In fact, Windows 7 uses it exclusively for the "Home Group" peer to peer networking. A computer shouldn't try to use IPv6 unless it's available for reaching the destination and the DNS returns AAAA records. Even then, once a TCP connection is established, IPv6 should not even be a factor.
James, I acknowledge your expertise in this area, about which I know next to nothing. However, I can report that with IPv6 enabled it takes Yast > Software Management several minutes to download and rebuild the repo caches. With IPv6 disabled, the same process takes a few seconds. I don't know where the bottleneck lies, YaST's configuration?, the openSUSE repository servers?, the aether? Bob -- Bob Williams System: Linux 3.4.11-2.16-desktop Distro: openSUSE 12.2 (x86_64) with KDE Development Platform: 4.9.5 "release 3" Uptime: 06:00am up 8:55, 3 users, load average: 0.11, 0.13, 0.13 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 24/01/13 16:23, Bob Williams wrote:
On 24/01/13 14:59, James Knott wrote:
Dave Howorth wrote:
I'm curious as to why some people have problems with IPv6 turned on. Because some ISPs have their equipment incorrectly configured.
If they only provide IPv4, why is that an issue? If there's no IPv6 route out of a computer or local network, then it shouldn't affect IPv4. Does BW have IPv6 available? Every computer with a modern OS should have, at least, link local IPv6. In fact, Windows 7 uses it exclusively for the "Home Group" peer to peer networking. A computer shouldn't try to use IPv6 unless it's available for reaching the destination and the DNS returns AAAA records. Even then, once a TCP connection is established, IPv6 should not even be a factor.
James,
I acknowledge your expertise in this area, about which I know next to nothing. However, I can report that with IPv6 enabled it takes Yast > Software Management several minutes to download and rebuild the repo caches. With IPv6 disabled, the same process takes a few seconds.
I don't know where the bottleneck lies, YaST's configuration?, the openSUSE repository servers?, the aether?
Bob
I've been fighting this since I installed 12.2 on some machines, in fact I decided to delay switching from my faithful 11.4 until updates stopped. I found that it seemed OK on my main machine with dnsmasq but all others hardware or virtual were unusable with zypper because the dns failed if there was a long file downloaded. This happened if they used my main box for dns or my router/modem. It was only when I tried on another ISP system that the message changed and gave me an error message including an IPv6 address. I rebooted with IPv6 disabled and no errors or delays. Now with IPv6 disabled on all machines updates fly. My ISP will not be changing to IPv6 until latter in the year. Hope this helps someone. DC -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Dave Cotton wrote:
Now with IPv6 disabled on all machines updates fly. Check your /etc/hosts file to ensure you've got both IPv4 and IPv6 loop back addresses. Bob Williams found he was missing one for IPv4 and adding it fixed his problem.
It should look something like this: # special IPv4 addresses 127.0.0.1 localhost.localdomain localhost 127.0.0.1 ipv4-localhost ipv4-loopback # special IPv6 addresses ::1 localhost ipv6-localhost ipv6-loopback fe00::0 ipv6-localnet ff00::0 ipv6-mcastprefix ff02::1 ipv6-allnodes ff02::2 ipv6-allrouters ff02::3 ipv6-allhosts -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Bob Williams wrote:
On 24/01/13 14:59, James Knott wrote:
Dave Howorth wrote:
I'm curious as to why some people have problems with IPv6 turned on. Because some ISPs have their equipment incorrectly configured.
If they only provide IPv4, why is that an issue? If there's no IPv6 route out of a computer or local network, then it shouldn't affect IPv4. Does BW have IPv6 available? Every computer with a modern OS should have, at least, link local IPv6. In fact, Windows 7 uses it exclusively for the "Home Group" peer to peer networking. A computer shouldn't try to use IPv6 unless it's available for reaching the destination and the DNS returns AAAA records. Even then, once a TCP connection is established, IPv6 should not even be a factor.
James,
I acknowledge your expertise in this area, about which I know next to nothing. However, I can report that with IPv6 enabled it takes Yast > Software Management several minutes to download and rebuild the repo caches. With IPv6 disabled, the same process takes a few seconds.
I don't know where the bottleneck lies, YaST's configuration?, the openSUSE repository servers?, the aether?
It's not a bottleneck as such, it's most probably probably time-outs due to your system thinking it is able to reach non-local IPv6 addresses. -- Per Jessen, Zürich (-1.4°C) http://www.dns24.ch/ - free DNS hosting, made in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Per Jessen wrote:
It's not a bottleneck as such, it's most probably probably time-outs due to your system thinking it is able to reach non-local IPv6 addresses.
The question is why is that happening? IPv6 shouldn't even be attempted, if a route is not available. Even if link local IPv6 is available, a router is supposed to advertise a route to the Internet. If there's no route, then IPv6 shouldn't be tried. While there might be a slight delay for the compute to determine there is no route, once an IPv4 TCP connection is set up, IPv6 shouldn't be considered. Why does this only affect some? I haven't experienced it, even though I didn't have IPv6 disabled before I started using it. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
James Knott wrote:
Per Jessen wrote:
It's not a bottleneck as such, it's most probably probably time-outs due to your system thinking it is able to reach non-local IPv6 addresses.
The question is why is that happening? IPv6 shouldn't even be attempted, if a route is not available.
Agree. I can think of one reason only - no IPv4 connectivity either, but then disabling IPv6 wouldn't help.
Even if link local IPv6 is available, a router is supposed to advertise a route to the Internet. If there's no route, then IPv6 shouldn't be tried. While there might be a slight delay for the compute to determine there is no route, once an IPv4 TCP connection is set up, IPv6 shouldn't be considered. Why does this only affect some? I haven't experienced it, even though I didn't have IPv6 disabled before I started using it.
Same here, and I don't understand why this only happens on some systems. -- Per Jessen, Zürich (-0.1°C) http://www.dns24.ch/ - free DNS hosting, made in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
This happened to me about 5 years ago. I had a router which was IPV4 and so was the host. The PC was set up for IPV6. Each dns lookup would timeout on IPV6 and would then try IPV4. I had to turn off IPV6 Bob R On 01/25/2013 08:28 AM, Per Jessen wrote:
James Knott wrote:
Per Jessen wrote:
It's not a bottleneck as such, it's most probably probably time-outs due to your system thinking it is able to reach non-local IPv6 addresses. The question is why is that happening? IPv6 shouldn't even be attempted, if a route is not available. Agree. I can think of one reason only - no IPv4 connectivity either, but then disabling IPv6 wouldn't help.
Even if link local IPv6 is available, a router is supposed to advertise a route to the Internet. If there's no route, then IPv6 shouldn't be tried. While there might be a slight delay for the compute to determine there is no route, once an IPv4 TCP connection is set up, IPv6 shouldn't be considered. Why does this only affect some? I haven't experienced it, even though I didn't have IPv6 disabled before I started using it. Same here, and I don't understand why this only happens on some systems.
-- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Robert Rawlinson wrote:
This happened to me about 5 years ago. I had a router which was IPV4 and so was the host. The PC was set up for IPV6. Each dns lookup would timeout on IPV6 and would then try IPV4. I had to turn off IPV6
Bob R
Too long ago to investigate, but that sounds pretty dodgy. If your system was attempting DNS lookup via IPv6, it would mean it had an IPv6 address listed in /etc/resolv.conf. -- Per Jessen, Zürich (-0.6°C) http://www.dns24.ch/ - free DNS hosting, made in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Per Jessen wrote:
Too long ago to investigate, but that sounds pretty dodgy. If your system was attempting DNS lookup via IPv6, it would mean it had an IPv6 address listed in /etc/resolv.conf.
IPv6 does not require an IPv6 DNS. Any DNS with AAAA records can provide IPv6 addresses. For example, as an experiment, I tethered my notebook computer to my cell phone, to force an IPv4 connection. I then ran "host google.com" on my desktop computer, which has an IPv6 connection and also on my notebook. On the desktop, I got the following: google.com has address 74.125.226.232 google.com has address 74.125.226.238 google.com has address 74.125.226.228 google.com has address 74.125.226.229 google.com has address 74.125.226.226 google.com has address 74.125.226.224 google.com has address 74.125.226.233 google.com has address 74.125.226.231 google.com has address 74.125.226.230 google.com has address 74.125.226.225 google.com has address 74.125.226.227 google.com has IPv6 address 2607:f8b0:4006:803::1002 google.com mail is handled by 50 alt4.aspmx.l.google.com. google.com mail is handled by 10 aspmx.l.google.com. google.com mail is handled by 30 alt2.aspmx.l.google.com. google.com mail is handled by 40 alt3.aspmx.l.google.com. google.com mail is handled by 20 alt1.aspmx.l.google.com. I also got similar on my notebook, with its IPv4 only connection. So, IPv6 addresses may be present on a DNS request, whether via IPv4 or IPv6. The problem is why is the IPv6 address being tried, when there's no IPv6 route. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
James Knott wrote:
Per Jessen wrote:
Too long ago to investigate, but that sounds pretty dodgy. If your system was attempting DNS lookup via IPv6, it would mean it had an IPv6 address listed in /etc/resolv.conf.
[snip]
So, IPv6 addresses may be present on a DNS request, whether via IPv4 or IPv6. The problem is why is the IPv6 address being tried, when there's no IPv6 route.
So back to what I said - if the system was attempting DNS lookup _via_ IPv6, it would mean it had an IPv6 address listed in /etc/resolv.conf. Any reasonably up-to-date application would today be doing a DNS lookup looking for both IPv4 and IPv6 addresses, but the only reason for attempting a lookup via IPv6, would be if the resolver(s) were IPv6-only. I don't know how the resolver handles the situation where the resolver addresses has no valid route. -- Per Jessen, Zürich (-2.2°C) http://www.dns24.ch/ - free DNS hosting, made in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 25/01/13 17:38, Per Jessen wrote:
James Knott wrote:
Per Jessen wrote:
Too long ago to investigate, but that sounds pretty dodgy. If your system was attempting DNS lookup via IPv6, it would mean it had an IPv6 address listed in /etc/resolv.conf.
[snip]
So, IPv6 addresses may be present on a DNS request, whether via IPv4 or IPv6. The problem is why is the IPv6 address being tried, when there's no IPv6 route.
So back to what I said - if the system was attempting DNS lookup _via_ IPv6, it would mean it had an IPv6 address listed in /etc/resolv.conf.
Any reasonably up-to-date application would today be doing a DNS lookup looking for both IPv4 and IPv6 addresses, but the only reason for attempting a lookup via IPv6, would be if the resolver(s) were IPv6-only. I don't know how the resolver handles the situation where the resolver addresses has no valid route.
I've now found a problem following disabling of IPv6. I have a script that sends a report to root on completion. It now says sendmail: fatal: config variable inet_interfaces: host not found: localhost In YaST, my Host Configuration has one entry for localhost ::1 localhost ipv6-localhost ipv6-loopback Should I replace this with 127.0.0.1 localhost localhost or can I add that line to the file? Bob -- Bob Williams System: Linux 3.4.11-2.16-desktop Distro: openSUSE 12.2 (x86_64) with KDE Development Platform: 4.9.5 "release 3" Uptime: 06:00am up 1 day 12:21, 3 users, load average: 0.02, 0.10, 0.56 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Bob Williams wrote:
::1 localhost ipv6-localhost ipv6-loopback
Should I replace this with
127.0.0.1 localhost localhost
or can I add that line to the file?
You should have both, one each for IPv4 and IPv6. In fact, I wouldn't be surprised if that was the cause of your initial problem -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 26/01/13 19:48, James Knott wrote:
Bob Williams wrote:
::1 localhost ipv6-localhost ipv6-loopback
Should I replace this with
127.0.0.1 localhost localhost
or can I add that line to the file?
You should have both, one each for IPv4 and IPv6. In fact, I wouldn't be surprised if that was the cause of your initial problem
Thanks. I've added that line and re-enabled IPv6. I'll report back after next reboot. Bob -- Bob Williams System: Linux 3.4.11-2.16-desktop Distro: openSUSE 12.2 (x86_64) with KDE Development Platform: 4.9.5 "release 3" Uptime: 18:00pm up 2 days 0:21, 3 users, load average: 0.06, 0.13, 0.21 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Bob Williams wrote:
You should have both, one each for IPv4 and IPv6. In fact, I wouldn't
be surprised if that was the cause of your initial problem Thanks. I've added that line and re-enabled IPv6. I'll report back after next reboot.
It shouldn't require a reboot for a change like that. Linux isn't Windows where you often have to reboot after changing something. About the only thing in Linux that requires a reboot is a kernel update. BTW, those loop back addresses are used because so many things are network based and need an address even when used within the same computer. For example, you could type ping localhost (or ping6) to make sure your computer is really there. ;-) An interesting point is that IPv4, with it's limited address range, reserves an entire class A range of 16 million addresses for loop back, whereas IPv6, with it's incredibly huge address range uses only 1. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 26/01/13 22:47, James Knott wrote:
Bob Williams wrote:
You should have both, one each for IPv4 and IPv6. In fact, I wouldn't
be surprised if that was the cause of your initial problem Thanks. I've added that line and re-enabled IPv6. I'll report back after next reboot.
It shouldn't require a reboot for a change like that. Linux isn't Windows where you often have to reboot after changing something. About the only thing in Linux that requires a reboot is a kernel update.
Yes, I know. But YaST says that re- | dis-abling IPv6 won't take effect until after a reboot. So, I do as I'm told. :) Anyway, I can report back that it's definitely faster with both entries, and IPv6 enabled than it was when this thread started. So, once again, thank you for your help. Bob -- Bob Williams System: Linux 3.4.11-2.16-desktop Distro: openSUSE 12.2 (x86_64) with KDE Development Platform: 4.9.5 "release 3" Uptime: 06:00am up 7:30, 3 users, load average: 0.13, 0.12, 0.14 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Bob Williams wrote:
Anyway, I can report back that it's definitely faster with both entries, and IPv6 enabled than it was when this thread started.
So, once again, thank you for your help.
Now you can start thinking about running IPv6. If your ISP doesn't provide it, you can use a tunnel broker, as I do. I use gogo6 http://www.gogo6.com, but there are others, such as he.net. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
-----Original Message-----
From: James Knott
Anyway, I can report back that it's definitely faster with both entries, and IPv6 enabled than it was when this thread started.
So, once again, thank you for your help.
Now you can start thinking about running IPv6. If your ISP doesn't provide it, you can use a tunnel broker, as I do. I use gogo6 http://www.gogo6.com, but there are others, such as he.net. -----Original Message----- Well said James. Last week i found out that (finally) ftp5.gwdg.de has an V6 address also. So i found out that my 4TB local mirror is rsynced with v6. If i add the "-4" option to my rsync (forcing to IPv4), it doe not get any faster. hw -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 23/01/13 09:35, Per Jessen wrote:
Bob Williams wrote:
On 23/01/13 08:59, Per Jessen wrote:
Bob Williams wrote:
I'm thinking of upgrading my NIC to a gigabit model, and read elsewhere that Intel devices are usually compatible with linux (drivers in the kernel).
I guess you've also got a gigabit switch?
Not sure what you mean. The card will connect to a Draytek Vigor 2800v ADSL2/2+ router.
Bob
Then there's no point in getting a gigabit NIC - your ADSL line doesn't (presumably) give you more then 24Mbit/s?
A gigabit NIC will only be useful if whatever it connects to (usually a switch) also does gigabit speeds.
Aha! Thank you for enlightening me, before I parted with my cash. Bob -- Bob Williams System: Linux 3.4.11-2.16-desktop Distro: openSUSE 12.2 (x86_64) with KDE Development Platform: 4.9.5 "release 3" Uptime: 06:00am up 8 days 13:12, 5 users, load average: 0.16, 0.28, 0.81 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Bob Williams wrote:
I'm thinking of upgrading my NIC to a gigabit model, and read
elsewhere that Intel devices are usually compatible with linux (drivers in the kernel).
I guess you've also got a gigabit switch?
Not sure what you mean. The card will connect to a Draytek Vigor 2800v ADSL2/2+ router.
Unless your ADSL provides better than 100 Mb/s, a gigabit card won't give you any improvement. So, if you're only connecting to ADSL, you're wasting your money. On the other hand, if you have other local computers with gigabit ports, then you will get some benefit networking with those computers, provided you have a gigabit switch to connect them. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 23/01/13 13:09, James Knott wrote:
Bob Williams wrote:
I'm thinking of upgrading my NIC to a gigabit model, and read
elsewhere that Intel devices are usually compatible with linux (drivers in the kernel).
I guess you've also got a gigabit switch?
Not sure what you mean. The card will connect to a Draytek Vigor 2800v ADSL2/2+ router.
Unless your ADSL provides better than 100 Mb/s, a gigabit card won't give you any improvement. So, if you're only connecting to ADSL, you're wasting your money. On the other hand, if you have other local computers with gigabit ports, then you will get some benefit networking with those computers, provided you have a gigabit switch to connect them.
OK. Thanks for this info. It looks as if I need to tweak my networking configuration. Bob -- Bob Williams System: Linux 3.4.11-2.16-desktop Distro: openSUSE 12.2 (x86_64) with KDE Development Platform: 4.9.5 "release 3" Uptime: 06:00am up 8 days 13:12, 5 users, load average: 0.16, 0.28, 0.81 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 01/23/2013 03:13 AM, Bob Williams pecked at the keyboard and wrote:
I'm thinking of upgrading my NIC to a gigabit model, and read elsewhere that Intel devices are usually compatible with linux (drivers in the kernel).
Amazon UK are selling the Intel Gigabit CT Desktop Adapter. The product specification states:
'Support for most network operating systems' but does not mention linux specifically.
Does anyone have experience with this model, or any other recommendations?
Many thanks
Bob
Is this for a home network or corporate server? If a home network there really is not much need. If you think you will have faster internet speeds you need to re-think your logic. :-) -- Ken Schneider SuSe since Version 5.2, June 1998 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 1/23/2013 2:18 PM, Ken Schneider - openSUSE wrote:
Is this for a home network or corporate server? If a home network there really is not much need. If you think you will have faster internet speeds you need to re-think your logic. I can't say what the original poster had in mind but I know that in my case, there is more to it than just internet speed. Transferring large files from one home PC to another is much faster with gigabit NIC.
Damon Register -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
Damon Register wrote:
Is this for a home network or corporate server? If a home network there really is not much need. If you think you will have faster internet speeds you need to re-think your logic. I can't say what the original poster had in mind but I know that in my case, there is more to it than just internet speed. Transferring large files from one home PC to another is much faster with gigabit NIC.
His other computers were connected via WiFi. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
participants (12)
-
Bernhard Voelker -
Bob Williams -
Damon Register -
Dave Cotton -
Dave Howorth -
Hans Witvliet -
James Knott -
Ken Schneider - openSUSE -
Per Jessen -
Rajko -
Robert Rawlinson -
Roger Oberholtzer