Red Hat Bugzilla – Bug 120908
duplicate routes created
Last modified: 2014-03-16 22:44:15 EDT
Description of problem: I have a firewall box running RHEL3. It has 4 network interfaces and two of which (eth2,eth3) are doing 802.1q VLANS. On the internet facing interface (eth0) I have multiple IPs bound with virtual interfaces. My routing table has the default route duplicated many times. # netstat -rn Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 10.2.4.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2.99 66.62.77.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 10.2.6.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2.8 10.2.7.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2.9 10.2.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2.3 10.70.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth3.10 10.2.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2.4 10.2.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2.5 10.2.3.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2.100 10.2.8.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2.11 10.2.9.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2.12 10.2.10.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2.13 10.2.11.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2.14 10.1.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo 0.0.0.0 66.62.77.1 0.0.0.0 UG 0 0 0 eth0 0.0.0.0 66.62.77.1 0.0.0.0 UG 0 0 0 eth0 0.0.0.0 66.62.77.1 0.0.0.0 UG 0 0 0 eth0 0.0.0.0 66.62.77.1 0.0.0.0 UG 0 0 0 eth0 0.0.0.0 66.62.77.1 0.0.0.0 UG 0 0 0 eth0 0.0.0.0 66.62.77.1 0.0.0.0 UG 0 0 0 eth0 0.0.0.0 66.62.77.1 0.0.0.0 UG 0 0 0 eth0 0.0.0.0 66.62.77.1 0.0.0.0 UG 0 0 0 eth0 0.0.0.0 66.62.77.1 0.0.0.0 UG 0 0 0 eth0 0.0.0.0 66.62.77.1 0.0.0.0 UG 0 0 0 eth0 0.0.0.0 66.62.77.1 0.0.0.0 UG 0 0 0 eth0 0.0.0.0 66.62.77.1 0.0.0.0 UG 0 0 0 eth0 0.0.0.0 66.62.77.1 0.0.0.0 UG 0 0 0 eth0 My GATEWAY is defined in my ifcfg-eth0 file and not /etc/sysconfig/network. I have the following ifcfg files: ifcfg-eth0 ifcfg-eth0:2 ifcfg-eth0:7 ifcfg-eth2.100 ifcfg-eth2.14 ifcfg-eth2.9 ifcfg-eth0:1 ifcfg-eth0:3 ifcfg-eth0:8 ifcfg-eth2.101 ifcfg-eth2.3 ifcfg-eth2.99 ifcfg-eth0:10 ifcfg-eth0:4 ifcfg-eth0:9 ifcfg-eth2.11 ifcfg-eth2.4 ifcfg-eth3 ifcfg-eth0:11 ifcfg-eth0:5 ifcfg-eth1 ifcfg-eth2.12 ifcfg-eth2.5 ifcfg-eth3.10 ifcfg-eth0:12 ifcfg-eth0:6 ifcfg-eth2 ifcfg-eth2.13 ifcfg-eth2.8 ifcfg-lo
By moving the GATEWAY line *out* of ifcfg-eth0 and into /etc/sysconfig/network the problem is fixed. These duplicate default routes cause problems from certain software like OpenSWAN. Be aware that anaconda and redhat-config-network stick the GATEWAY into the ifcfg files and not /etc/sysconfig/network. So the problem of duplicate routes still needs fixing.
Is it only in ifcfg-eth0?
Ah, it's a 'function' of ifup-aliases.
Yes, the GATEWAY line was only in ifcfg-eth0.
As for the fix, search for 'broken' in ifup-aliases, and remove that block. :)
Fixed in 7.31.14.EL-1/6.47.9-1.
Fix confirmed with initscripts-7.31.16.EL-1.
An errata has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2004-328.html