Arch Linux

OakRaider4Life

Member

Registered: 2012-02-08

Posts: 98

iproute2: Setting a static route through a wireless bridge

Hi,

I've just successfully setup a dd-wrt wireless bridge which I am now trying to setup some hosts on with static ip addresses. When I try to setup my routes using iproute2, I'm continuously encountering the error

RTNETLINK answers: Network is unreachable

This is incredibly frustrating, because I can't seem to find any reason the network would be unreachable. Here are the details.

Gateway IP: 192.168.0.1
Bridge IP: 192.168.0.2
Host machine IP: 192.168.0.4 (Changed from 192.168.0.3, thinking there may be a collision. No difference.)
Host machine is linked to the wireless bridge via eth0

Routes:

[root@arch james-arch]# ip route
192.168.0.0/24 dev eth0 
192.168.0.2 dev eth0

I also tried removing the 2nd route and setting only the 192.168.0.0/24 route, which not surprisingly had no impact.

The gateway WILL ping under that configuration

[root@arch james-arch]# ping 192.168.0.1
PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.
64 bytes from 192.168.0.1: icmp_seq=1 ttl=64 time=109 ms
64 bytes from 192.168.0.1: icmp_seq=2 ttl=64 time=2.32 ms
^C
--- 192.168.0.1 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 2.327/56.091/109.856/53.765 ms

However the static route will absolutely not set.

[root@arch james-arch]# ip route add default via 192.168.0.1
RTNETLINK answers: Network is unreachable

The most frustrating part about this is that from this exact configuration, dhcp will work with absolutely no problems.

[root@arch james-arch]# dhcpcd eth0
dhcpcd[23843]: version 5.6.8 starting
dhcpcd[23843]: eth0: sending IPv6 Router Solicitation
dhcpcd[23843]: eth0: rebinding lease of 192.168.0.107
dhcpcd[23843]: eth0: acknowledged 192.168.0.107 from 192.168.0.1
dhcpcd[23843]: eth0: checking for 192.168.0.107
dhcpcd[23843]: eth0: sending IPv6 Router Solicitation
dhcpcd[23843]: eth0: leased 192.168.0.107 for 86400 seconds
dhcpcd[23843]: forked to background, child pid 23934
[root@arch james-arch]# ip route
default via 192.168.0.1 dev eth0  metric 202 
192.168.0.0/24 dev eth0  proto kernel  scope link  src 192.168.0.107 
192.168.0.0/24 dev eth0  proto kernel  scope link  src 192.168.0.107  metric 202

Checking out the dhcp established routes, I can't seem to deduce any problem with the manner in which I'm trying to establish the static route.

Thanks in advance for any help, troubleshooting tips, or anything, really.

BGK

Member

From: France

Registered: 2013-07-06

Posts: 30

Re: iproute2: Setting a static route through a wireless bridge

Did you try to append your network device in your command?

ip route add default via 192.168.0.1 dev eth0

OakRaider4Life

Member

Registered: 2012-02-08

Posts: 98

Re: iproute2: Setting a static route through a wireless bridge

Did you try to append your network device in your command?

ip route add default via 192.168.0.1 dev eth0

Yes it doesn't make any difference.

OakRaider4Life

Member

Registered: 2012-02-08

Posts: 98

Re: iproute2: Setting a static route through a wireless bridge

For documentation purposes:

I believe I identified my problem here. It looks like I failed to provide all of the relevant details (sorry to anyone who took the time to read this thread). I don't quite remember the command I executed, but I believe I assigned the IP address using something like

ip addr add 192.168.0.3/32

When I needed to be using a /24 netmask, e.g.

ip addr add 192.168.0.3/24

I haven't tested this yet, so I can't confirm, but I made this mistake working on another project and had to have a co-worker point out my mistake to me. I will test when I get a chance and come back and mark this as solved if that takes care of the issue.