3Com MSR 50 Series Configuration Manual page 1551

path to the peer CE is now along the BGP route across the backbone, and that a
route to the sham link destination address is present. Take PE 1 as an example:
[PE1] display ip routing-table vpn-instance vpn1
Routing Tables: vpn1
Destinations : 6
Destination/Mask Proto
3.3.3.3/32 Direct 0
5.5.5.5/32 BGP
20.1.1.0/24 OSPF
100.1.1.0/24 Direct 0
100.1.1.2/32 Direct 0
120.1.1.0/24 BGP
Issuing the display ip routing-table command on the CEs, you should see that
the cost of the OSPF route to the peer CE is now 10 (the cost configured for the
sham link), and that the next hop is now the Ethernet interface connected to the
PE. This means that VPN traffic to the peer will be forwarded over the backbone.
Takes CE 1 as an example:
[CE1] display ip routing-table
Routing Tables: Public
Destinations : 9
Destination/Mask Proto
20.1.1.0/24 Direct 0
20.1.1.1/32 Direct 0
20.1.1.2/32 Direct 0
30.1.1.0/24 OSPF
100.1.1.0/24 Direct 0
100.1.1.1/32 Direct 0
120.1.1.0/24 OSPF
127.0.0.0/8 Direct 0
127.0.0.1/32 Direct 0
Issuing the display ospf sham-link command on the PEs, you should see the
established sham link. Takes PE 1 as an example:
[PE1] display ospf sham-link
OSPF Process 100 with Router ID 100.1.1.2
Sham Link:
Area RouterId
0.0.0.1 100.1.1.2
Issuing the display ospf sham-link area command, you should see that the
status of the peer is Full:
[PE1] display ospf sham-link area 1
OSPF Process 100 with Router ID 100.1.1.2
Sham-Link: 3.3.3.3 --> 5.5.5.5
Neighbour State: Full
Area: 0.0.0.1
Cost: 10 State: P-2-P, Type: Sham
Timers: Hello 10 , Dead 40 , Retransmit 5 , Transmit Delay 1
MPLS L3VPN Configuration Example
Routes : 6
Pre Cost NextHop
0 127.0.0.1
255 0 2.2.2.9
10 1563 100.1.1.1
0 100.1.1.2
0 127.0.0.1
255 0 2.2.2.9
Routes : 9
Pre Cost NextHop
0 20.1.1.1
0 127.0.0.1
0 20.1.1.2
10 1574 100.1.1.2
0 100.1.1.1
0 127.0.0.1
10 12 100.1.1.2
0 127.0.0.1
0 127.0.0.1
Source-IP Destination-IP
3.3.3.3 5.5.5.5
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Interface
InLoop0
NULL0
Eth1/0
Eth1/0
InLoop0
NULL0
Interface
S2/1
InLoop0
S2/1
Eth1/0
Eth1/0
InLoop0
Eth1/0
InLoop0
InLoop0
State Cost
P-2-P 10