[Xorp-users] Xorp, pimsm and ethertap

[Calum]

Hello Pavlin,

The "unable to ping" problem was just a firewall rule, and isn't an
issue any more.

Yes, the thing I am thinking about is not just up/down, but actually
killing the process that creates the tap.
Let me try it out, and see what happens:

bash # kill 24904
bash # ifconfig taphush
taphush: error fetching interface information: Device not found
bash # ip link show taphush
Device "taphush" does not exist.
bash #

Nothing untoward appeared in the window that is running xorp_rtrmgr in.

However, xorp seems to be unaware that it's gone.
# bin/xorpsh
Welcome to XORP on torro
root@torro> show interfaces
taphush/taphush: Flags:<ENABLED,BROADCAST,MULTICAST> mtu 1500
        physical index 12
        ether 4a:12:38:a6:de:7c

Running commit causes this sort of thing:

[ 2006/02/24 23:23:08 INFO xorp_bgp BGP ] Sending: Notification
Packet: Hold Timer Expired(4)
[ 2006/02/24 23:23:08  ERROR xorp_bgp:25341 LIBCOMM +354 comm_sock.c
comm_sock_bind4 ] Error binding socket (family = 2, my_addr =
10.0.0.122, my_port = 0): Cannot assign requested address

Which is fair enough.
If I start the process back up...

# ./start-tap
# ifconfig taphush
taphush   Link encap:Ethernet  HWaddr 42:98:7F:BF:54:95
          inet addr:10.0.0.122  Bcast:10.0.0.123  Mask:255.255.255.252

> show bgp peers detail
Peer 1: local 10.0.0.122/179 remote 10.0.0.121/179
  Peer ID: 10.0.0.1
  Peer State: ESTABLISHED
  Admin State: START

So it seems to pick it back up fairly painlessly.

Anyway, back to the main problem. :)
I've set the next-hop and local-ip both to 1.0.0.122, but I'm not
seeing any routes via route -n.
Do I need to specify what routes I will allow to be accepted or something?
Or do I need to add a network statement for the /30 link between the
two routers or something like that?

C

> show bgp routes
Status Codes: * valid route, > best route
Origin Codes: i IGP, e EGP, ? incomplete

   Prefix                Nexthop                    Peer            AS Path
   ------                -------                    ----            -------
*  10.0.0.0/30            10.0.0.121                  10.0.0.1        1 i
*  10.0.0.4/30            10.0.0.121                  10.0.0.1        1 i
...... snip lots of lines.

So I'm getting the routes in from AS 1 ( 10.0.0.121).
But route -n at the shell doesn't show any of them.