[Xorp-users] iBGP routes not being used/forwarded

[Russ Dill]

I'd like to use the BGP component of XORP to forward routes along with some
additional per route data across an existing network. The machine has a
wireless card that connects to a mesh network. The wireless card runs its
own layer 2 routing protocol internally. From the wireless card, I'm
collecting reachable hosts and forwarding them via BGP to the local XORP
daemon. I use BGP so that I can also forward additional required information
about the devices as BGP options to remote systems that are running the same
collect/forward daemon. The entire wireless network appears as a flat class
A network to devices on the network.

Ok, so each machine that connects to the wireless network and runs an XORP
daemon to bridge that network across a backhaul would have an XORP boot file
that looks like the following:

interfaces {
    interface mea0 {
    default-system-config
    }
    interface eth0 {
    default-system-config
    }
}

fea {
    unicast-forwarding4 {
    disable: false
    }
}

protocols {
    bgp {
        bgp-id: 192.168.1.136 /* backhaul IP */
        local-as: 65002 /* local AS */

        peer 127.0.0.1 {
            local-ip: 10.54.12.1 /* wireless IP */
            as: 65002 /* local AS */
            next-hop: 10.54.12.1 /* wireless IP */
            holdtime: 0
        }
        peer 192.168.1.126 { /* backhaul router */
            local-ip: 192.168.1.136 /* backhaul IP */
            as: 65000 /* AS of backhaul network */
            next-hop: 192.168.1.136 /* wireless IP */
        }
    }
}

So the XORP daemon comes up, and has the following connected routes:

root at russ-laptop> show route table ipv4 unicast connected
10.0.0.0/8    [connected(0)/0]
        > via mea0/mea0
192.168.1.0/24    [connected(0)/0]
        > via eth0/eth0

And connects with the following BGP peers:
root at russ-laptop> show bgp peers detail
Peer 1: local 10.0.0.1/179 remote 127.0.0.1/179
  Peer ID: 10.0.0.1
  Peer State: ESTABLISHED
  Admin State: START
  Negotiated BGP Version: 4
  Peer AS Number: 65002
  Updates Received: 1,  Updates Sent: 0
  Messages Received: 3,  Messages Sent: 2
  Time since last received update: 51 seconds
  Number of transitions to ESTABLISHED: 1
  Time since last entering ESTABLISHED state: 51 seconds
  Retry Interval: 120 seconds
  Hold Time: 0 seconds,  Keep Alive Time: 0 seconds
  Configured Hold Time: 0 seconds,  Configured Keep Alive Time: 0 seconds
  Minimum AS Origination Interval: 0 seconds
  Minimum Route Advertisement Interval: 0 seconds

Peer 2: local 192.168.1.136/179 remote 192.168.1.126/179
  Peer ID: 192.168.1.126
  Peer State: ESTABLISHED
  Admin State: START
  Negotiated BGP Version: 4
  Peer AS Number: 65000
  Updates Received: 0,  Updates Sent: 0
  Messages Received: 3,  Messages Sent: 3
  Time since last received update: n/a
  Number of transitions to ESTABLISHED: 1
  Time since last entering ESTABLISHED state: 51 seconds
  Retry Interval: 120 seconds
  Hold Time: 90 seconds,  Keep Alive Time: 30 seconds
  Configured Hold Time: 90 seconds,  Configured Keep Alive Time: 30 seconds
  Minimum AS Origination Interval: 0 seconds
  Minimum Route Advertisement Interval: 0 seconds

The local collect/forward daemon talks to XORP and the following shows up in
XORP:

root at russ-laptop> show bgp routes
Status Codes: * valid route, > best route
Origin Codes: i IGP, e EGP, ? incomplete

   Prefix                Nexthop                    Peer            AS Path
   ------                -------                    ----            -------
*  10.170.232.0/24       10.170.232.1               10.0.0.1      65002 i
*  10.172.51.0/24        10.172.51.1                10.0.0.1      65002 i

root at russ-laptop> show bgp routes detail
10.170.232.0/24
    From peer: 10.0.0.1
    Route: Not Used
    Origin: IGP
    AS Path: 65002
    Nexthop: 10.170.232.1
10.172.51.0/24
    From peer: 10.0.0.1
    Route: Not Used
    Origin: IGP
    AS Path: 65002
    Nexthop: 10.172.51.1

However, no local routes are added:

ip route
192.168.1.0/24 dev eth0  proto kernel  scope link  src 192.168.1.136  metric
2
169.254.0.0/16 dev eth0  scope link  metric 1000
10.0.0.0/8 dev mea0  scope link
default via 192.168.1.1 dev eth0

And no updates are sent to the backhaul peer.

Both peers are running XORP 1.5-6 from debian.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ICSI.Berkeley.EDU/pipermail/xorp-users/attachments/20081124/00310e24/attachment.html