Brocade Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide (Supporting R05.6.00) - Manual (Page 733)

Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide 709
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BGP or MPLS VPN sample configurations
6
BGP or MPLS VPN sample configurations
This section presents examples of typical MPLS configurations. The following sample
configurations are presented:
• “Basic configuration example for IBGP on the PEs”
• “EBGP for route exchange”
• “Static routes for route exchange”
• “RIP for route exchange”
• “OSPF for route exchange”
• “Cooperative route filtering”
• “Using an IP extcommunity variable with route map”
• “Autonomous system number override”
• “Setting an LSP for each VRF on a PE”
• “OSPF sham links”
Basic configuration example for IBGP on the PEs
PE routers use IBGP to exchange VRF routes. As in all BGP configurations, this is accomplished by
configuring BGP neighbors where the user wants to exchange routes. When the neighbors are
configured in the same AS, it is an IBGP configuration. In addition, because MPLS LSPs are made
between router loopback addresses, the [update-source loopback] parameters must be used. The
example in
Figure 73 shows two PE routers (PE 1 and PE 4) that are configured as BGP neighbors.
FIGURE 73 IBGP example
To configure IBGP on a Provider Edge router (PE) of a BGP or MPLS VPN network, the user must
perform the configuration steps listed below.
1. “Assigning an AS number to a PE”
2. “Assigning a loopback interface”