3Com 3C13636 Configuration Manual page 911

3Com Router 3000 Ethernet Family
Configuration Guide
Note:
In the case the configuration is focused on two points:
Route advertisement can be controlled by VPN-target settings on different PEs.
One routing loop is permitted, so that PE can receive route update messages with
AS number included from CE.
In the HUB&SPOKE networking on the PE1, Vpn-target of VPN-instance
(VPN-instance3) for releasing routings cannot be the same with any Vpn-target of
VPN-instance (VPN-instance2) for redistributing routings.
In the HUB&SPOKE networking on the PE1, route-distinguisher rd2 (100:2) of
VPN-instance for releasing routings cannot be the same with any one of
corresponding route-distinguisher rd1(100:1) , rd4 (100:4) on each PE2, PE3. Rd1
and rd4 can be same or not.
II. Network diagram
Spoke Site Spoke Site
CE2 CE2
Figure 3-16 Hub&Spoke network diagram
III. Configuration procedure
Note:
The following contents are omitted in this case: MPLS basic capacity configuration
between PEs, configuration between PE and P, configuration between CEs. For these
details refer to the former case.
1) Configure PE1
Hub Site Hub Site
Ethernet1/0/0.2 Ethernet1/0/0.2
172.17.0.1/16 172.17.0.1/16
Loopback0 Loopback0
11.1.1.1/32 11.1.1.1/32
Internet Internet
PE2 PE2
Ethernet1/0/0 Ethernet1/0/0
Loopback0 Loopback0
172.15.0.1/16 172.15.0.1/16
22.1.1.1/32 22.1.1.1/32
3Com Corporation
Chapter 3 BGP/MPLS VPN Configuration
CE1 CE1
Ethernet1/0/0.1 Ethernet1/0/0.1
172.16.0.1/16 172.16.0.1/16
PE1 PE1
Spoke Site Spoke Site
PE3 PE3
CE3 CE3
20.1.1.2 20.1.1.2
Ethernet1/0/0 Ethernet1/0/0
Loopback0 Loopback0
172.18.0.1/16 172.18.0.1/16
33.1.1.1/32 33.1.1.1/32
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