[c-nsp] IPv6 BGP peering problem

[Dave Mifsud]

Hi Term,

My end is a 7606 running 12.2(18)SFX1. Don't know about the other end
actually.

The peer is over an IPv6 only-over-IPv4 tunnel. I had tried lowering my
end IPv6 MTU to 1280, but to no avail.

The config of the tunnel interface currently reads so:

interface Tunnel202
 no ip address
 ipv6 address 2001:DB8:FF00:1::D/126
 ipv6 enable
 ipv6 mtu 1280
 tunnel source Loopback12
 tunnel destination 192.0.2.1
 tunnel mode ipv6ip


Dave

On 20/05/06 05:38, Term wrote:
> 
> If you're dual stacking the interfaces check your mtu
> and what ios are you seeing the problems on ?
> 
> 
> At 09:59 PM 5/19/2006, you wrote:
>> Hi all,
>>
>> Am having a problem with an IPv6 BGP peering. The same router has
>> another two IPv6 BGP peers working, but this new peer remains in ACTIVE
>> state.
>>
>> Any light on this issue would be greatly appreciated.
>>
>> config and debug output below.
>>
>> Thanks & Regards,
>>
>> Dave
>>
>> >the relevant BGP config:
>>
>> router bgp 65000
>>  neighbor 2001:DB8:FF00:1::E remote-as 65001
>>  !
>>  address-family ipv4
>>  no neighbor 2001:DB8:FF00:1::E activate
>>  no auto-summary
>>  synchronization
>>  exit-address-family
>>  !
>>  address-family ipv6
>>  neighbor 2001:DB8:FF00:1::E activate
>>  neighbor 2001:DB8:FF00:1::E soft-reconfiguration inbound
>>  network 2001:DB8::/32
>>  exit-address-family
>>  !
>> ipv6 route 2001:DB8::/32 Null0
>>
>>
>> > debug ip tcp shows the following:
>> 11:43:20: BGP: 2001:DB8:FF00:1::E open active, local address
>> 2001:DB8:FF00:1::D
>> 11:43:20: TCB53FF6DB0 created
>> 11:43:20: TCB53FF6DB0 setting property TCP_VRFTABLEID (14) 53C72FB4
>> 11:43:20: TCB53FF6DB0 setting property TCP_MD5KEY (2) 0
>> 11:43:20: TCB53FF6DB0 setting property unknown (16) 53F83F14
>> 11:43:20: TCB53FF6DB0 setting property TCP_TOS (1) 53F83F00
>> 11:43:20: TCB53FF6DB0 setting property TCP_TTL (10) 53F83F01
>> 11:43:20: TCB53FF6DB0 bound to 2001:DB8:FF00:1::D.16991
>> 11:43:20: TCP: sending SYN, seq 1143279122, ack 0
>> 11:43:20: TCP0: Connection to 2001:DB8:FF00:1::E:179, advertising MSS
>> 4390
>> 11:43:20: TCP0: state was CLOSED -> SYNSENT [16991 ->
>> 2001:DB8:FF00:1::E(179)]
>> 11:43:20: TCP: input 2001:DB8:FF00:1::E(179) -> 16991: ACK while in
>> LISTEN
>> 11:43:20: TCP: sending RST, seq 1143279123, ack 0
>> 11:43:20: TCP: sent RST to 2001:DB8:FF00:1::E:179 from
>> 2001:DB8:FF00:1::D:16991
>> 11:43:23: TCP: input 2001:DB8:FF00:1::E(179) -> 16991: ACK while in
>> LISTEN
>> 11:43:23: TCP: sending RST, seq 1143279123, ack 0
>> 11:43:23: TCP: sent RST to 2001:DB8:FF00:1::E:179 from
>> 2001:DB8:FF00:1::D:16991
>> 11:43:26: TCP: sending RST, seq 0, ack 3617774540
>> 11:43:26: TCP: sent RST to 2001:DB8:FF00:1::E:33820 from
>> 2001:DB8:FF00:1::D:179
>> 11:43:29: TCP: input 2001:DB8:FF00:1::E(179) -> 16991: ACK while in
>> LISTEN
>> 11:43:29: TCP: sending RST, seq 1143279123, ack 0
>> 11:43:29: TCP: sent RST to 2001:DB8:FF00:1::E:179 from
>> 2001:DB8:FF00:1::D:16991
>> 11:43:41: TCP0: timeout #3 - timeout is 9000 ms, seq 1143279122
>> 11:43:41: TCP: (16991) -> 2001:DB8:FF00:1::E(179)
>> 11:43:41: TCP: input 2001:DB8:FF00:1::E(179) -> 16991: ACK while in
>> LISTEN
>> 11:43:41: TCP: sending RST, seq 1143279123, ack 0
>> 11:43:41: TCP: sent RST to 2001:DB8:FF00:1::E:179 from
>> 2001:DB8:FF00:1::D:16991
>> 11:43:45: TCP: sending RST, seq 0, ack 2090914474
>>
>>

-- 
Dave Mifsud
Systems Engineer
Computing Services Centre
University of Malta

CSC Tel: (+356) 2340 3004      CSC Fax: (+356) 21 343 397