Tunnel Endpoint Vlans - Extreme Networks BlackDiamond 6800 MPLS Installation And User Manual

Configuring MPLS Layer-2 VPNs
ESRP is run over the Ethernet VLAN connecting the two hub-LSRs, and the redundant
IP address configured for ESRP is also being used as the tunnel endpoint address.
Using this configuration, the LSRs at the spoke sites automatically connect to the active
hub-LSR and rapidly adapt to failures. If the master hub-LSR fails, ESRP activates the
standby hub-LSR, which then responds by advertising a route and label mapping for
the tunnel endpoint IP address.
The LSRs at the spoke sites receive the label mapping and begin using the new tunnel
LSP. Loopback mode should not be enabled when ESRP is being used to provide
redundancy and ESRP should not be enabled on a VLAN that is expected to exchange
routes with other non-ESRP routers (for example, routers using RIP or OSPF).

Tunnel Endpoint VLANs

Another example of using ESRP is shown in Figure 7-6.
7-18 MPLS Module Installation and User Guide