R2511-HP MSR Router Series MPLS Configuration Guide(V5)
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*> 10.1.1.1/32 10.2.1.2 0 100?
* 10.2.1.0/24 10.2.1.2 0 0 100?
* 10.2.1.1/32 10.2.1.2 0 0 100?
*> 100.1.1.1/32 10.2.1.2 0 100 100?
<CE2> display ip routing-table
Routing Tables: Public
Destinations : 9 Routes : 9
Destination/Mask Proto Pre Cost NextHop Interface
10.1.1.0/24 BGP 255 0 10.2.1.2 Eth1/1
10.1.1.1/32 BGP 255 0 10.2.1.2 Eth1/1
10.2.1.0/24 Direct 0 0 10.2.1.1 Eth1/1
10.2.1.1/32 Direct 0 0 127.0.0.1 InLoop0
10.2.1.2/32 Direct 0 0 10.2.1.2 Eth1/1
100.1.1.1/32 BGP 255 0 10.2.1.2 Eth1/1
127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0
127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
200.1.1.1/32 Direct 0 0 127.0.0.1 InLoop0
After you also configure BGP AS substitution on PE 1, the Ethernet interfaces of CE 1 and CE 2 can
ping each other.
<CE1> ping –a 100.1.1.1 200.1.1.1
PING 200.1.1.1: 56 data bytes, press CTRL_C to break
Reply from 200.1.1.1: bytes=56 Sequence=1 ttl=253 time=109 ms
Reply from 200.1.1.1: bytes=56 Sequence=2 ttl=253 time=67 ms
Reply from 200.1.1.1: bytes=56 Sequence=3 ttl=253 time=66 ms
Reply from 200.1.1.1: bytes=56 Sequence=4 ttl=253 time=85 ms
Reply from 200.1.1.1: bytes=56 Sequence=5 ttl=253 time=70 ms
--- 200.1.1.1 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 66/79/109 ms
Configuring BGP AS number substitution and SoO
Network requirements
CE 1, CE 2, and CE 3 belong to VPN 1 and connect to PE1, PE 2, and PE 3, respectively.
CE 1 and CE 2 reside in the same site. CE1, CE2, and CE 3 all use AS number 600.
To avoid route loss, configure BGP AS number substitution on PEs. To avoid routing loops, configure a
routing policy on PE1 and PE2 to add the SoO attribute to routes received from CE 1 and CE 2.










