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Re: Strange IPv6 Routing Behaviour[LONG]



In article <[🔎] 20020608194512.GA723@g7iii.demon.co.uk> (at Sat, 8 Jun 2002 20:45:12 +0100), Iain Young <iain@g7iii.demon.co.uk> says:

> My IPv6 network looks like this:
> 
> |------------------------------------------------------------------| BGP 64512
>   |                                     |
>   |bond0(fec0::1:203:baff:fe04:ee5f/64) |eth0(fec0::1:210:5aff:fe2e:fad8/64)
> columbia                            pathfinder
>                                         |tap0(fec0::7000:fefd:0:0:2/64)
>                                         |
>                                         |eth0(fec0::7000:fefd:0:0:1/64)
>                                      iii-gw1
>                                         |eth1(fec0::7800:fefd:0:0:2/64)
>                                         |
>                                         |eth0(fec0::7800:fcfd:aff:fe0b:cd04/64)
>                                        ldap
:

> What ldap can't do is tracepath6 to is the eth0 of pathfinder, 
> or to columbia (bond0). It dies with a !H (Host Unreachable):
:

> iii-gw1:
> 
> iii-gw1> sh ipv6 route
> Codes: K - kernel route, C - connected, S - static, R - RIPng, O - OSPFv3,
>        B - BGP, * - FIB route.
> 
> B>* ::/0 [20/0] via fe80::2ff:34ff:fef3:8b2f, eth0, 01:04:18
> C>* ::1/128 is directly connected, lo
> C>* 2001:618:406:7000::/64 is directly connected, eth0
> O   2001:618:406:7800::/64 [110/0] is directly connected, eth1, 00:33:25
> C>* 2001:618:406:7800::/64 is directly connected, eth1
> C>* fe80::/10 is directly connected, dummy0
> C * fe80::/10 is directly connected, eth1
> C * fe80::/10 is directly connected, eth0
> C>* fec0:0:0:7000::/64 is directly connected, eth0
> O   fec0:0:0:7800::/64 [110/0] is directly connected, eth1, 00:33:25
> C>* fec0:0:0:7800::/64 is directly connected, eth1

> Does anyone have any idea as to why I seem to be unable to route
> across my 'backbone' ? Or even up to eth0 of pathfinder ? I also have
> 2001 addresses as well, and the behaviour is identical.

(Mainline) linux kernel does not support default route on router,
whose forwarding is enabled.
Apply USAGI <http://www.linux-ipv6.org> patch and enable 
CONFIG_IPV6_EN_DFLT.

-- 
Hideaki YOSHIFUJI @ USAGI Project <yoshfuji@linux-ipv6.org>
GPG FP: 9022 65EB 1ECF 3AD1 0BDF  80D8 4807 F894 E062 0EEA


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