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Old 01-20-2014, 03:08 AM   #1
extcommunity
LQ Newbie
 
Registered: Jan 2014
Posts: 1

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IPv6 router failover


Hi,

I tested IPv6 NDP failover but without success.

OS: Xubuntu, kernel 3.11.0-15-generic


Topology:

---- Router 1
Client -
---- Router 2



Automatic IPv6 configuration of network interface.

Code:
notebook:~$ ifconfig
 eth0      Link encap:Ethernet  HWaddr 00:16:d3:8d:d7:d1  
           inet6 addr: fe80::216:d3ff:fe8d:d7d1/64 Scope:Link
           inet6 addr: 2011:abc:55:55:216:d3ff:fe8d:d7d1/64 Scope:Global
           inet6 addr: 2011:abc:55:55:3861:f333:e0fa:106b/64 Scope:Global
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:57008 errors:0 dropped:31 overruns:0 frame:0
           TX packets:56138 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000 
           RX bytes:6393965 (6.3 MB)  TX bytes:6874111 (6.8 MB)


Scenario:

- two gateways with same loopback address
- continuously ping the loopback address 2011:abc:11:11::1
- after some time disconecting one router


After some time client should use second router and connectivity should back to normal


During ping

Code:
notebook:~$ ip neigh sho
 fe80::f225:72ff:fed5:74f0 dev eth0  router REACHABLE
 fe80::46e4:d9ff:feeb:f86c dev eth0 lladdr 44:e4:d9:eb:f8:6c router STALE

After router router fail

Code:
notebook:~$ ip neigh sho
 fe80::f225:72ff:fed5:74f0 dev eth0  router INCOMPLETE
 fe80::46e4:d9ff:feeb:f86c dev eth0 lladdr 44:e4:d9:eb:f8:6c router STALE

First default gateway is still in INCOMPLETE state and client still want to use it but should change to another.

Anyone know why? Is is bug in implementation?
Thanks
 
  


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