default gateway disappearing

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ldean
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Joined: 09 Sep 2013
Posts: 6

PostPosted: Wed Sep 11, 2013 20:35    Post subject: default gateway disappearing Reply with quote
Trying to figure out why my linksys E2500 running dd-wrt is consistently losing the default gateway settings.

I have the WAN connection type set to static IP, and have my gateway set there. If I go into a terminal window, and run route, I see there is no default gateway:

Code:

root@DD-WRT:~# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
207.*.*.64   *               255.255.255.224 U     0      0        0 vlan2
192.168.1.0     *               255.255.255.0   U     0      0        0 br0
169.254.0.0     *               255.255.0.0     U     0      0        0 br0
127.0.0.0       *               255.0.0.0       U     0      0        0 lo

I can add a default route manually, and then traffic starts flowing to the internet again:

Code:
root@DD-WRT:~# route add default gw 207.*.*.65
root@DD-WRT:~# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
207.*.*.64   *               255.255.255.224 U     0      0        0 vlan2
192.168.1.0     *               255.255.255.0   U     0      0        0 br0
169.254.0.0     *               255.255.0.0     U     0      0        0 br0
127.0.0.0       *               255.0.0.0       U     0      0        0 lo
default         207.*.*.65.p 0.0.0.0         UG    0      0        0 vlan2
root@DD-WRT:~# ping 4.2.2.2
PING 4.2.2.2 (4.2.2.2): 56 data bytes
64 bytes from 4.2.2.2: seq=0 ttl=58 time=3.729 ms
64 bytes from 4.2.2.2: seq=1 ttl=58 time=3.883 ms

--- 4.2.2.2 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 3.729/3.806/3.883 ms
root@DD-WRT:~#


but once I reboot, it disappears again. I think it may have something to do with the fact that I was testing a L2TP tunnel from this device, as every time it would attempt to connect to the L2TP, I would get disconnected locally, and my default gateway would be gone once I got reconnected, but even when I'm not configured as an L2TP connection type, I'm still having this issue of the gateway disappearing.

Seems bizarre to me that you can't create a L2TP tunnel while also specifying static IP info, but it seems to be using the static IP info previously entered after I switch to L2TP mode. I haven't been able to get the tunnel to establish so far though. My bigger concern is this gateway issue however. Any suggestions?

Thanks!
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