I'm trying to use ip route to setup a single interface with two ip
addresses. I currently have:
/ # /usr/sbin/ip address show
1: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:19:03:00:27:10 brd ff:ff:ff:ff:ff:ff
inet 128.0.0.1/16 brd 128.0.255.255 scope global eth0:1
inet 172.17.31.84/24 brd 172.17.31.255 scope global eth0
2: lo: <LOOPBACK,UP,10000> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
/ # /usr/sbin/ip route
172.17.31.0/24 dev eth0 proto kernel scope link src 172.17.31.84
128.0.0.0/16 dev eth0 proto kernel scope link src 128.0.0.1
default via 172.17.31.1 dev eth0
/ # /usr/sbin/ip route show table local
broadcast 172.17.31.255 dev eth0 proto kernel scope link src 172.17.31.84
broadcast 127.255.255.255 dev lo proto kernel scope link src 127.0.0.1
broadcast 128.0.0.0 dev eth0 proto kernel scope link src 128.0.0.1
local 128.0.0.1 dev eth0 proto kernel scope host src 128.0.0.1
broadcast 172.17.31.0 dev eth0 proto kernel scope link src 172.17.31.84
broadcast 128.0.255.255 dev eth0 proto kernel scope link src 128.0.0.1
local 172.17.31.84 dev eth0 proto kernel scope host src 172.17.31.84
broadcast 127.0.0.0 dev lo proto kernel scope link src 127.0.0.1
local 127.0.0.1 dev lo proto kernel scope host src 127.0.0.1
local 127.0.0.0/8 dev lo proto kernel scope host src 127.0.0.1
What I'd like is to have it so that the src address is always 172.17.31.84
for both 172.17.31.0/24 & 128.0.0.0/16.
So I modify the routes to get:
/ # /usr/sbin/ip route show
172.17.31.0/24 dev eth0 proto kernel scope link src 172.17.31.84
128.0.0.0/16 dev eth0 proto kernel scope link src 172.17.31.84
default via 172.17.31.1 dev eth0
however if the dest is 128.0.0.1 the src is still 128.0.0.1:
/ # /usr/sbin/ip route get 128.0.0.1
local 128.0.0.1 dev lo src 128.0.0.1
cache <local> mtu 16436 advmss 16396 metric 10 64
Is there any way to modify the routes so this 'loopback' src becomes
172.17.31.84?
I'm running a 2.6.20 kernel.
thanks
- kumar
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