On Tue, Mar 27, 2007 at 05:32:57PM +0100, Jon Morby wrote:
> .. and probably me doing something wrong but I can't spot it
>
> I am trying to setup a native IPv6 BGP session to BT Exact
>
> I have the interface setup as v6 only
>
> [EMAIL PROTECTED] cat /etc/hostname.vlan303
> up vlan 303 vlandev trunk0 description UK6x
> inet6 2001:7f8:2:1::21 64
>
> [EMAIL PROTECTED] cat /etc/hostname.trunk0
> trunkport bge0 trunkport bge1 up
>
> and can ping their end of the link fine
>
> [EMAIL PROTECTED] ping6 -c 3 2001:7f8:2:1::1
> PING6(56=40+8+8 bytes) 2001:7f8:2:1::21 --> 2001:7f8:2:1::1
> 16 bytes from 2001:7f8:2:1::1, icmp_seq=0 hlim=64 time=0.367 ms
> 16 bytes from 2001:7f8:2:1::1, icmp_seq=1 hlim=64 time=0.293 ms
> 16 bytes from 2001:7f8:2:1::1, icmp_seq=2 hlim=64 time=0.447 ms
>
> --- 2001:7f8:2:1::1 ping6 statistics ---
> 3 packets transmitted, 3 packets received, 0.0% packet loss
> round-trip min/avg/max/std-dev = 0.293/0.369/0.447/0.063 ms
>
> OpenBGPD is configured thusly (500 line bgpd.conf cut down to basic
> essentials)
>
> AS 8282
> network 194.70.36.0/24
> network 84.246.192.0/21
> network 80.252.112.0/20
> network 2a01:2c0::/32
>
> group IPvSix {
> set nexthop self
> softreconfig in yes
> softreconfig out yes
> set community 8282:600
> # announce IPv4 none
> announce IPv6 unicast
>
> neighbor 2001:7f8:2:1::1 {
> multihop 3
> local-address 2001:7f8:2:1::21
> remote-as 1752
> }
> }
>
> Sessions however won't initiate
>
> (they've also tried with/without override-capability-neg on their end)
>
> Mar 27 16:27:46 l3-c1 bgpd[32629]: SE reconfigured
> Mar 27 16:27:55 l3-c1 bgpd[32629]: neighbor 2001:7f8:2:1::1: state
> change Idle -> Active, reason: Start
> Mar 27 16:27:55 l3-c1 bgpd[32629]: neighbor 2001:7f8:2:1::1:
> session_setup_socket setsockopt hoplimit: Protocol not available
> Mar 27 16:27:55 l3-c1 bgpd[32629]: neighbor 2001:7f8:2:1::1: state
> change Active -> Idle, reason: Fatal error
>
> Their debug output shows the following
>
> Mar 27 15:36:51.347 BST: BGP: 2001:7F8:2:1::21 open active, local
> address 2001:7F8:2:1::1
> Mar 27 15:36:51.347 BST: BGPNSF: Building graceful restart capability
> for 2001:7F8:2:1::21
> Mar 27 15:36:51.347 BST: BGP: 2001:7F8:2:1::21 went from Active to
> OpenSent
> Mar 27 15:36:51.347 BST: BGP: 2001:7F8:2:1::21 sending OPEN, version
> 4, my as: 1752, holdtime 360 seconds
> Mar 27 15:36:51.347 BST: BGP: 2001:7F8:2:1::21 send message type 1,
> length (incl. header) 51
> Mar 27 15:36:51.431 BST: BGP: 2001:7F8:2:1::21 remote close, state
> CLOSED
> Mar 27 15:36:51.431 BST: BGP: 2001:7F8:2:1::21 -reset the session
> Mar 27 15:36:51.431 BST: BGPNSF state: 2001:7F8:2:1::21 went from
> nsf_not_active to nsf_not_active
> Mar 27 15:36:51.431 BST: BGP: 2001:7F8:2:1::21 went from OpenSent to
> Idle
> Mar 27 15:36:51.431 BST: BGP: 2001:7F8:2:1::21 closing
> Mar 27 15:36:51.439 BST: BGP: 2001:7F8:2:1::21 went from Idle to Active
> Mar 27 15:36:51.439 BST: BGP: 2001:7F8:2:1::21 open active delayed
> 28351ms (35000ms max, 28% jitter)
>
> I haven't tried restarting bgpd completely as this is on a production
> server ... but I'm hoping it's just a stupid config error somewhere
> that can easily resolved ?
>
> This is on -current as of a week ago
>
> Any ideas?
>
Try this diff. It seems to solve the problem for me.
--
:wq Claudio
Index: session.c
===================================================================
RCS file: /cvs/src/usr.sbin/bgpd/session.c,v
retrieving revision 1.271
diff -u -p -r1.271 session.c
--- session.c 16 Mar 2007 14:06:57 -0000 1.271
+++ session.c 27 Mar 2007 17:10:07 -0000
@@ -1162,7 +1162,7 @@ session_setup_socket(struct peer *p)
if (p->conf.ebgp && p->conf.remote_addr.af == AF_INET6)
/* set hoplimit to foreign router's distance */
- if (setsockopt(p->fd, IPPROTO_IPV6, IPV6_HOPLIMIT, &ttl,
+ if (setsockopt(p->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &ttl,
sizeof(ttl)) == -1) {
log_peer_warn(&p->conf,
"session_setup_socket setsockopt hoplimit");
