Which files do I need to edit in order to initialize a route after a reboot.
I have a 802.1q tagged VLAN interface which I need to create a rule, and a route for.
I see on my CentOs 4.2 box that in /etc/iproute2 there are the following files. I realize that I can add my tables to /etc/iproute2/rt_tables, but when I want to create a rule I am not sure where to put the information for the next reboot.
[root@smtcormx01 ~ ]# ls -la /etc/iproute2/ total 104 drwxr-xr-x 2 root root 4096 Oct 28 13:44 . drwxr-xr-x 87 root root 12288 Oct 28 21:47 .. -rw-r--r-- 1 root root 299 Feb 21 2005 rt_dsfield -rw-r--r-- 1 root root 286 Feb 21 2005 rt_dsfield.rt_config -rw-r--r-- 1 root root 296 Feb 21 2005 rt_protos -rw-r--r-- 1 root root 276 Feb 21 2005 rt_protos.rt_config -rw-r--r-- 1 root root 113 Feb 21 2005 rt_realms -rw-r--r-- 1 root root 112 Feb 21 2005 rt_realms.rt_config -rw-r--r-- 1 root root 98 Feb 21 2005 rt_scopes -rw-r--r-- 1 root root 92 Feb 21 2005 rt_scopes.rt_config -rw-r--r-- 1 root root 91 Feb 21 2005 rt_tables -rw-r--r-- 1 root root 87 Feb 21 2005 rt_tables.rt_config
On Fri, 2005-10-28 at 22:39 -0400, Robin Mordasiewicz wrote:
Which files do I need to edit in order to initialize a route after a reboot.
I have a 802.1q tagged VLAN interface which I need to create a rule, and a route for.
I see on my CentOs 4.2 box that in /etc/iproute2 there are the following files. I realize that I can add my tables to /etc/iproute2/rt_tables, but when I want to create a rule I am not sure where to put the information for the next reboot.
[root@smtcormx01 ~ ]# ls -la /etc/iproute2/ total 104 drwxr-xr-x 2 root root 4096 Oct 28 13:44 . drwxr-xr-x 87 root root 12288 Oct 28 21:47 .. -rw-r--r-- 1 root root 299 Feb 21 2005 rt_dsfield -rw-r--r-- 1 root root 286 Feb 21 2005 rt_dsfield.rt_config -rw-r--r-- 1 root root 296 Feb 21 2005 rt_protos -rw-r--r-- 1 root root 276 Feb 21 2005 rt_protos.rt_config -rw-r--r-- 1 root root 113 Feb 21 2005 rt_realms -rw-r--r-- 1 root root 112 Feb 21 2005 rt_realms.rt_config -rw-r--r-- 1 root root 98 Feb 21 2005 rt_scopes -rw-r--r-- 1 root root 92 Feb 21 2005 rt_scopes.rt_config -rw-r--r-- 1 root root 91 Feb 21 2005 rt_tables -rw-r--r-- 1 root root 87 Feb 21 2005 rt_tables.rt_config
Interesting, I didn't think their was something stock for this, I always spun my own sctipt for QOS policies when I was using htb qdisc a while back.
Ted
On Fri, 28 Oct 2005, Robin Mordasiewicz wrote:
Which files do I need to edit in order to initialize a route after a reboot.
I have a 802.1q tagged VLAN interface which I need to create a rule, and a route for.
I see on my CentOs 4.2 box that in /etc/iproute2 there are the following files. I realize that I can add my tables to /etc/iproute2/rt_tables, but when I want to create a rule I am not sure where to put the information for the next reboot.
I wrote the following /sbin/ifup-local script. Mebbe someone has something to say...
<snip /sbin/ifup-local> #!/bin/bash # # Robin Mordasiewicz robin@bullseye.tv # The following script is copied and pasted together from the existing # network startup scripts found on RedHat-AS/CentOS
# This custom script is run last. This is called by the ifup-post script # on a RedHat/CentOS based system. # # This script will add a routing table and a rule for each VLAN interface # so that when responding to traffic from a box with multiple tagged VLAN # interfaces the proper VLAN tags are added.
# The problem is that Linux repsonds to traffic based on the routing # table, which means that packets which are sent out the device which the # default gateway is configured will be tagged with the wrong VLAN
# The only devices that this script should act on are tagged VLAN # interfaces Tagged VLAN interfaces will be in the form bond0.xxx, or # eth0.xxx. Other regular devices such as lo, eth0, or bond0 should not # require this script to run
# This requires that you have a "GATEWAY=x.x.x.x", "TABLE=???", and # optionally a "PRIORITY=xx" configured in the interface config, # ie. /etc/sysconfig/network-scripts/ifcfg-bondx.xxx, # or /etc/sysconfig/network-scripts/ifcfg-ethx.xxx
# It is also required that your tables are properly listed in # /etc/iproute2/rt_tables
# For more information read the following websites. # http://www.linuxjournal.com/article/7291 # http://lartc.org/howto/lartc.rpdb.html if echo ${1} | LANG=C egrep -v '(:)' | LANG=C egrep -q \ '(eth|bond)[0-9][0-9]*.[0-9][0-9]?[0-9]?[0-9]?'; then . /etc/init.d/functions
cd /etc/sysconfig/network-scripts . network-functions
[ -f ../network ] && . ../network
CONFIG=${1}
[ -z "${CONFIG}" ] && { echo $"Usage: ifup <device name>" >&2 exit 1 }
need_config ${CONFIG}
[ -f "${CONFIG}" ] || { echo $"$0: configuration for ${1} not found." >&2 echo $"Usage: ifup-local <device name>" >&2 exit 1 }
source_config
if [ -z "$TABLE" -o -z "$GATEWAY" ]; then exit 0 fi
VID="`echo ${DEVICE} | \ LANG=C egrep '(eth|bond)[0-9]+.[0-9][0-9]?[0-9]?[0-9]?$' | \ LANG=C sed 's/^[a-z0-9]*.//g;s/^0*//'`" PHYSDEV="`echo ${DEVICE} | \ LANG=C egrep '(eth|bond)[0-9]+.[0-9][0-9]?[0-9]?[0-9]?$' | \ LANG=C sed 's/.[a-z0-9]*$//g'`"
if [ -z ${PRIORITY} ]; then PRIORITY=${VID} fi action $"Setting default route ${GATEWAY} for table: ${TABLE}" \ /sbin/ip route replace default via ${GATEWAY} dev ${DEVICE} \ table ${TABLE}
while `ip rule list | LANG=C egrep -q \ "from ${IPADDR} lookup ${TABLE}"`; do /sbin/ip rule delete from ${IPADDR} lookup ${TABLE} done
action $"Setting Source ${IPADDR} to use routing table: ${TABLE}" \ /sbin/ip rule add from ${IPADDR} table ${TABLE} \ priority ${PRIORITY}
fi
-
Robin Mordasiewicz -
Ted Kaczmarek