3Com S7902E, Configuration Manual

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1-31
Item Network requirements
PE interfaces and
VPN instances
they belong to
z
PE 1: VLAN-interface 11 belongs to VPN instance b; VLAN-interface 12
belongs to VPN instance a; VLAN-interface 2 and Loopback 1 belong to the
public network instance.
z
PE 2: VLAN-interface 2, VLAN-interface 3, Loopback 1 and Loopback 2
belong to the public network instance.
z
PE 3: VLAN-interface 3, VLAN-interface 4, Loopback 1 and Loopback 2
belong to the public network instance.
z
PE 4: VLAN-interface 13 belongs to VPN instance a; VLAN-interface 14
belongs to VPN instance b; VLAN-interface 4 and Loopback 1 belong to the
public network instance.
Unicast routing
protocols and
MPLS
z
Configure OSPF separately in AS 100 and AS 200, and configure OSPF
between the PEs and CEs.
z
Establish BGP peer connections between PE 1, PE 2, PE 3 and PE 4 on
their respective Loopback 1 interface and exchange all private network
routes between them.
z
Configure MPLS separately in AS 100 and AS 200.
IP multicast
routing
z
Enable IP multicast routing in the public instance on PE 1, PE 2, PE 3 and
PE 4.
z
Enable IP multicast routing in VPN instance a on PE 1 and PE 4.
z
Enable IP multicast routing in VPN instance b on PE 1 and PE 4.
z
Enable IP multicast routing on CE a1, CE a2, CE b1, and CE b2.
IGMP
z
Run IGMPv2 on VLAN-interface 30 of CE a2.
z
Run IGMPv2 on VLAN-interface 40 of CE b2.
PIM
z
Enable PIM-SM on all public network interfaces of PE 2 and PE 3.
z
Enable PIM-SM on all public and private network interfaces of PE 1 and PE
4.
z
Enable PIM-SM on all interfaces of CE a1, CE a2, CE b1, and CE b2.
z
Configure Loopback 2 of PE 2 and PE 3 as a C-BSR and a C-RP for their
respective AS (to work for all multicast groups).
z
Configure Loopback 0 of CE a1 as a C-BSR and a C-RP for VPN a (to work
for all multicast groups).
z
Configure Loopback 0 of CE b1 as a C-BSR and a C-RP for VPN b (to work
for all multicast groups).
MSDP
z
Establish an MSDP peering relationship between PE 2 and PE 3 on their
respective Loopback 1.