3Com Router 3000 Ethernet FamilyConfiguration Guide Chapter 4 MPLS L2VPN Configuration3Com Corporation4-12Caution:With LDP/MPLS L2VPN, the VC ID assigned to a link must be unique among all thelinks with the same encapsulation type. Any encapsulation change is likely to cause VCID collision. Suppose that both the interfaces serial0 encapsulated with HDLC andserial1 encapsulated with PPP have created the LDP connections, both of which areassigned with VC ID 1. If the link layer encapsulation type on serial1 is changed toHDLC, there will be two CCC-HDLC encapsulated LDP connections with the same VCID of 1. To avoid the VC ID collision of these two connections, the LDP connection onserial1 will be automatically deleted.4.5 Configuration of MPLS L2VPN in Kompella ModePerform the following tasks to configure the MPLS L2VPN in Kompella mode on a PE:z Configure interfacez Enable MPLS and MPLS L2VPN.z Configure BGP parameterz Create and configure VPNz Create CE and configure CE connectionThe first two steps are identical with those for CCC mode, but you should configure inadvance some reserved interfaces for future expansion.4.5.1 Configuring BGP ParametersThe Kompella mode uses BGP as the signaling protocol to allocate VC labels, so youshould configure BGP parameters on PE. For detailed configuration of BGPparameters, refer to BGP Configuration of Routing Protocol Module.When BGP configuration is completed, you can activate the parameters for the peergroup in MPLS L2VPN address family view with the following commands:I. Entering L2VPN address family viewPerform the following configurations in BGP view.Table 4-12 Enter L2VPN address family viewOperation CommandEnter L2VPN address family view l2vpn-familyExit L2VPN address family view undo l2vpn-family
