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ospf6 and route loss

 

 

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eugene at zhegan

May 14, 2012, 9:32 PM

Post #1 of 1 (316 views)
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ospf6 and route loss

Hi.

I'm using quagga to handle ipv6 routes in my network.

I have the following setup:


router A <---ethernet---> router B <----WAN gre tunnels----> multiple
ospf routers

The problem is that quagga on router A reriodically loses (I'd say
'deletes', because in debug mode it's clear that router A quagga does
that) routes received by the router B from multiple other routers and
announced to the A.

The following output will show it more clearly:

Router B table:

wizard.hq.norma.perm.ru# sh ipv6 route ospf
Codes: K - kernel route, C - connected, S - static, R - RIPng, O - OSPFv3,
I - ISIS, B - BGP, * - FIB route.

O>* 2001:470:1f08:14c0::1/128 [110/1] via fe80::21a:64ff:fec6:a87c,
vlan1, 00:21:45
O 2001:470:1f09:14c0::/120 [110/1] via fe80::202:b3ff:fee9:8d0e,
vlan1, 07w2d06h
O>* 2a00:5cc0:c::/64 [110/2] via fe80::21a:64ff:fe21:9489, gre6, 03:13:14
O>* fd00::/120 [110/2] via fe80::21a:64ff:fe21:910e, gre1, 01w0d03h
O fd00::300/120 [110/1] is directly connected, vlan1, 09w5d02h
O>* fd00::700/120 [110/1] via fe80::202:b3ff:fee9:8d0e, vlan1, 09w4d18h
O>* fd00::d00/120 [110/2] via fe80::21a:64ff:fe21:9489, gre6, 03:10:25
O>* fd00::b400/120 [110/2] via fe80::21a:64ff:fe21:962d, gre2, 2d03h56m

Router A table after ospf6d is launched:

taiga# sh ipv6 route ospf
Codes: K - kernel route, C - connected, S - static, R - RIPng, O - OSPFv3,
I - ISIS, B - BGP, * - FIB route.

O 2001:470:1f09:14c0::/120 [110/1] via fe80::202:b3ff:fee9:8d0e,
vlan1, 00:00:29
O>* 2a00:5cc0:c::/64 [110/2] via fe80::21a:64ff:fe21:8e80, vlan1, 00:00:29
O>* fd00::/120 [110/3] via fe80::21a:64ff:fe21:8e80, vlan1, 00:00:29
O fd00::300/120 [110/1] is directly connected, vlan1, 00:00:30
O fd00::700/120 [110/1] via fe80::202:b3ff:fee9:8d0e, vlan1, 00:00:29
O>* fd00::d00/120 [110/4] via fe80::21a:64ff:fe21:8e80, vlan1, 00:00:29
O>* fd00::b400/120 [110/2] via fe80::21a:64ff:fe21:8e80, vlan1, 00:00:29
O fe80::/64 [110/1] via fe80::21a:64ff:fe21:8e80, vlan1, 00:00:29


Router A table after some time:

taiga# sh ipv6 route ospf
Codes: K - kernel route, C - connected, S - static, R - RIPng, O - OSPFv3,
I - ISIS, B - BGP, * - FIB route.

O 2001:470:1f09:14c0::/120 [110/1] via fe80::202:b3ff:fee9:8d0e,
vlan1, 00:23:20
O>* fd00::/120 [110/3] via fe80::21a:64ff:fe21:8e80, vlan1, 00:23:20
O fd00::300/120 [110/1] is directly connected, vlan1, 00:23:21
O fd00::700/120 [110/1] via fe80::202:b3ff:fee9:8d0e, vlan1, 00:23:20
O>* fd00::d00/120 [110/4] via fe80::21a:64ff:fe21:8e80, vlan1, 00:23:20

Notice the fd00::b400/120 route is gone. However, it's still present in
the router B table.

This isn't specific to quagga version. I observed this on like 5 last
versions.
How can this be solved ?

Is this some error in my ospf setup ?
By the way, can I use the same OSPF area numbers in OSPF6 as in OSPF4
(I use the same) ?

Thanks.
Eugene.
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