3Com MSR 50 Series Configuration Manual page 1553

resides; but has not learned the route to the VPN (100.1.1.0/24) behind CE 1. You
should see the similar situation on CE 1.
<CE2> display ip routing-table
Routing Tables: Public
Destinations : 8
Destination/Mask
10.1.1.0/24
10.1.1.1/32
10.2.1.0/24
10.2.1.1/32
10.2.1.2/32
127.0.0.0/8
127.0.0.1/32
200.1.1.0/24
200.1.1.1/32
Issuing the display ip routing-table vpn-instance command on the PEs, you
should see the route to the VPN behind the peer CE. Takes PE 2 as an example:
<PE2> display ip routing-table vpn-instance vpn1
Routing Tables: vpn1
Destinations : 7
Destination/Mask
10.1.1.0/24
10.1.1.1/32
10.2.1.0/24
10.2.1.1/32
10.2.1.2/32
100.1.1.1/32
200.1.1.1/32
Enabling BGP update packet debugging on PE 2, you should see that PE 2
advertises the route to 100.1.1.1/32, and the AS_PATH is 100 600.
<PE2> terminal monitor
<PE2> terminal debugging
<PE2> debugging bgp update vpn-instance vpn1 verbose
<PE2> refresh bgp vpn-instance vpn1 all export
*0.4402392 PE2 RM/7/RMDEBUG:
BGP.vpn1: Send UPDATE to 10.2.1.1 for following destinations :
Origin : Incomplete
AS Path : 100 600
Next Hop : 10.2.1.2
100.1.1.1/32,
Issuing the display bgp routing-table peer received-routes command on CE 2,
you should see that CE 2 did not receive the route to 100.1.1.1/32.
<CE2> display bgp routing-table peer 10.2.1.2 received-routes
Total Number of Routes: 4
BGP Local router ID is 10.2.1.1
Status codes: * - valid, > - best, d - damped,
h - history,
Origin : i - IGP, e - EGP, ? - incomplete
Network
*> 10.1.1.0/24
*> 10.1.1.1/32
* 10.2.1.0/24
* 10.2.1.1/32
MPLS L3VPN Configuration Example
Routes : 8
Proto Pre Cost
BGP 255 0
BGP 255 0
Direct 0 0
Direct 0 0
Direct 0 0
Direct 0 0
Direct 0 0
Direct 0 0
Direct 0 0
Routes : 7
Proto Pre Cost
BGP 255 0
BGP 255 0
Direct 0 0
Direct 0 0
Direct 0 0
BGP 255 0
BGP 255 0
i - internal, s - suppressed, S - Stale
NextHop MED
10.2.1.2
10.2.1.2
10.2.1.2 0
10.2.1.2 0
NextHop Interface
10.2.1.2 Eth1/0
10.2.1.2 Eth1/0
10.2.1.1 Eth1/0
127.0.0.1 InLoop0
10.2.1.2 Eth1/0
127.0.0.1 InLoop0
127.0.0.1 InLoop0
200.1.1.1 InLoop0
127.0.0.1 InLoop0
NextHop Interface
1.1.1.9 NULL0
1.1.1.9 NULL0
10.2.1.2 Eth1/0
10.2.1.1 Eth1/0
127.0.0.1 InLoop0
1.1.1.9 NULL0
10.2.1.1 Eth1/0
LocPrf PrefVal Path/Ogn
0 100?
0 100?
0 100?
0 100?
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