RE: network problem ongoing .....
I would still avoid using 255.255.254.0 as a netmask for a class C network. The default network mask is 255.255.255.0 then you can subnet from there borrowing bits from the fourth octet. Supernetting does not work well. The alternative is to use the 172.31.0.0 network with netmask 255.255.0.0 instead of the Class C one you are using. This will allow 2 to the power 16 minus 2 hosts. -- Regards Bill Antonia Network Manager Beacon Community College North Beeches Road Crowborough East Sussex TN6 2AS Tel 01892 603000 Fax 01892 664562
ok i have changed the subnet to 255.255.255.0 with no
change. The tcpdump command reveals something along
the lines of "arp who-has 10.0.40.1 tell 10.0.40.2"
with some numbers at the front of it. Thats on Eth1
which is the integrated NIC. I'm going to remove the
accton and change the integrated to the internal
settings and see what happens..
--- Bill Antonia
for a class C network. The default network mask is 255.255.255.0 then you can subnet from there borrowing bits from the fourth octet. Supernetting does not work well. The alternative is to use the 172.31.0.0 network with netmask 255.255.0.0 instead of the Class C one you are using. This will allow 2 to the power 16 minus 2 hosts. -- Regards Bill Antonia Network Manager Beacon Community College North Beeches Road Crowborough East Sussex TN6 2AS Tel 01892 603000 Fax 01892 664562
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On Wed, 26 Jun 2002, Steve Palmer wrote:
ok i have changed the subnet to 255.255.255.0 with no change. The tcpdump command reveals something along the lines of "arp who-has 10.0.40.1 tell 10.0.40.2" with some numbers at the front of it. Thats on Eth1 which is the integrated NIC. I'm going to remove the accton and change the integrated to the internal settings and see what happens..
OK, that's not particularly helpful since that packet was generated by your machine anyway. What would be more useful would be to see packets generated by other machines "going past on the wire". Run tcpdump, make sure all the cables are plugged in and watch for traffic that doesn't originate from your machine. If you have Windows machines on the network then you should see something fairly soon, otherwise you may have to try artificially generating some broadcast traffic. Try pinging 192.168.3.200 from another machine on the internal network while running both tcpdump commands and see if anything shows up. Michael
On Wed, 26 Jun 2002, Steve Palmer wrote:
ok i have changed the subnet to 255.255.255.0 with no change. The tcpdump command reveals something along the lines of "arp who-has 10.0.40.1 tell 10.0.40.2" with some numbers at the front of it. Thats on Eth1 which is the integrated NIC. I'm going to remove the accton and change the integrated to the internal settings and see what happens..
OK, that's not particularly helpful since that packet was generated by your machine anyway. What would be more useful would be to see packets
All the subnet mask could affect is if your machine will be sending the ARP request. If machine 10.0.40.1 saw it then it most definitly should send a response.
generated by other machines "going past on the wire". Run tcpdump, make sure all the cables are plugged in and watch for traffic that doesn't originate from your machine.
If you have Windows machines on the network then you should see something fairly soon, otherwise you may have to try artificially generating some
With Windows machines the easiest way to generate broadcast traffic is to log in on a workstation.
broadcast traffic. Try pinging 192.168.3.200 from another machine on the internal network while running both tcpdump commands and see if anything shows up.
If needs be leave them running a while. -- Mark Evans St. Peter's CofE High School Phone: +44 1392 204764 X109 Fax: +44 1392 204763
participants (4)
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Bill Antonia -
Mark Evans -
Michael Brown -
Steve Palmer