Re: [opensuse] no connection to router after boot

15 Jun 2014

      Daniel Bauer wrote:
...
Hello,
since quite a while (some months) I have no connection to the router after boot. After the boot and
login, I must switch off and on the router, establishing a new adsl-connection, and then the system
connects.
I have no idea where I could search for the reasons, where to look up hints or logs, what data I
should mention here, where to "screw" to solve the problem...
Opensuse 12.3
KDE 4.10.5
network setup "traditional" with ifup
connected by cable from eth0 to adsl-router
Once, after boot, I tried to switch to network-manager, but it tells me that no cable is connected,
so I switched back to "traditional".
Earlier, somebody said, I'd have to disconnect the router from all cables incl. phone line and
power, and leave it a while. I first thought that it helped, but in fact it did not...
Anybody had similar problems and found a solution?
Thanks for your help!
Daniel
Try this script (note: must be run as/by root):
_____________________SCRIPT STARTS ON NEXT LINE_________________________
#!/bin/bash
#
# quicknet - quickly set up networking on specified interface & IP
#
# Date          Who                     What/notes
# -----------   ----------------------- ------------------------------------
# 26 Feb 2010   Aaron R. Kulkis         Original version
# http://pastebin.com/yX6WSyMz
#
#
# Essence of program:
#   prompt and read INTERFACE
#     ifup $INTERFACE
#     ifconfig
#   prompt and read IP
#     ifconfig $INTERFACE $IP
#     ifconfig
#   prompt and read ROUTER
#     route add $ROUTER $INTERFACE
#     route
#     route add default gw $ROUTER $INTERFACE
#     route
#   ping ROUTER  (confirm connection to router)
#   ping 8.8.8.8 (Google open DNS host, confirms gateway operation))
#   ping www.google.com (confirms DNS operation)
#
#

SELF=`basename $0`

#
#### GET INTERFACE ##################
#

printf "Use which interface ? "
read INTERFACE

printf "execute ifup $INTERFACE ?"
read RESPONSE
case RESPONSE in
         y* | Y* )
         set -x
         ifup $INTERFACE
         ifconfig $INTERFACE
         set +x
         ;;
esac

#
#### GET ADDRESS ##################
#

printf "What IP address for $INTERFACE ? "
read IP

printf "\nAttempting to configure $INTERFACE\n"
set -x ; ifconfig $INTERFACE $IP ; set +x

printf "\nPress return key" ; read A
set -x ; ifconfig $INTERFACE  ; set +x

#
#### DEFINE ROUTER ##################
#

printf "What is the name or IP address of the router/gateway? "
read ROUTER

printf "specifying path to router $ROUTER\n"
set -x ; route add $ROUTER $INTERFACE ; set +x

# printf "\nPress return key" ; read A
# printf "Verifying route added to route table\n"
# set -x ; route ; set +x

printf "defining $ROUTER as the gateway.\n"
set -x ; route add default gw $ROUTER $INTERFACE ; set +x

# printf "\nPress return key" ; read A
# printf "Verify route added to route table\n"
# set -x ; route ; set +x

#
#### VERIFY ROUTE COMPLETE ##################
#

printf "Verifiny that  route table complete:\n"
set -x ; route ; set +x

printf "test local network with 3 pings: "
  set -x; ping -c 3 $ROUTER ; set +x

printf "test routing by pinging Google public DNS servers 3 times each\n"
set -x
  ping -c 3 8.8.8.8
  ping -c 3 8.8.4.4
set +x

printf "Testing DNS functionality:\n pinging www.google.com 3 times\n"
set -x; ping -c 3 www.google.com ; set +x
############# end of quicknet #####################

For ease of use, you can do something like this:

$  more eth1.1.101
eth1
y
192.168.1.101

192.168.1.254

$ qn < /local/bin/eth1.1.101

Note, instead of IP addresses, you can use hostnames placed in /etc/hosts/
Example:
$ grep "2wire\|wowhome" /etc/hosts
192.168.1.254   2wirerouter     2wire   2wirehome
192.168.0.1     wowrouter       wow     wowhome
$ more eth0.0.100
eth0
y
192.168.0.100

wowhome

$ more eth1.1.67
eth1
y
192.168.1.67

2wire

$ grep "2wire\|wowhome" /etc/hosts
192.168.1.254   2wirerouter     2wire   2wirehome
192.168.0.1     wowrouter       wow     wowhome

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Re: [opensuse] no connection to router after boot

Dirk Gently