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Cisco IOS Cookbook, 2nd Edition by Ian Brown, Kevin Dooley

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Your Service Provider Doesn’t Do What You Want

Problem

As an MPLS customer, you want to implement a feature like multicast or a particular PE-CE routing protocol that your service provider doesn’t support.

Solution

Some service providers support only a limited range of MPLS features. The most common missing features are specific routing protocols for PE-CE routing and multicast support. This example will assume that you want to pass OSPF and multicast through an MPLS network that supports only BGP:

Router-CE-A1#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Router-CE-A1(config)#ip multicast-routing
Router-CE-A1(config)#interface FastEthernet0/0.1
Router-CE-A1(config-if)#encapsulation dot1Q 101
Router-CE-A1(config-if)#ip address 192.168.1.5 255.255.255.0
Router-CE-A1(config-if)#exit
Router-CE-A1(config)#interface Loopback1
Router-CE-A1(config-if)#ip address 192.168.101.1 255.255.255.255
Router-CE-A1(config-if)#exit
Router-CE-A1(config)#interface Tunnel1
Router-CE-A1(config-if)#ip address 192.168.152.1 255.255.255.252
Router-CE-A1(config-if)#tunnel source 192.168.101.1
Router-CE-A1(config-if)#tunnel destination 192.168.101.2
Router-CE-A1(config-if)#ip pim sparse-dense-mode
Router-CE-A1(config-if)#exit
Router-CE-A1(config)#router bgp 65535
Router-CE-A1(config-router)#neighbor 192.168.1.1 remote-as 100
Router-CE-A1(config-router)#network 192.168.1.0
Router-CE-A1(config-router)#network 192.168.101.1 mask 255.255.255.255
Router-CE-A1(config-router)#no synchronization ...

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