Vpls Discovery And Signaling - Cisco CRS Configuration Manual

VPLS Discovery and Signaling

Access PW is configured as a member directly under a bridge domain. A bridge-domain in N-PE1 can have
multiple ACs (physical/VLAN Ethernet ports), multiple access PWs and one VFI (consisting of core PWs)
as members, is depicted in the below figure.
Figure 13: PW access for H-VPLS
VPLS Discovery and Signaling
VPLS is a Layer 2 multipoint service and it emulates LAN service across a WAN service. VPLS enables
service providers to interconnect several LAN segments over a packet-switched network and make it behave
as one single LAN. Service provider can provide a native Ethernet access connection to customers using
VPLS.
The VPLS control plane consists of two important components, autodiscovery and signaling:
• VPLS Autodiscovery eliminates the need to manually provision VPLS neighbors. VPLS Autodiscovery
• Once the PEs are discovered, pseudowires (PWs) are signaled and established across each pair of PE
Figure 14: VPLS Autodiscovery and Signaling
Cisco IOS XR Virtual Private Network Configuration Guide for the Cisco CRS Router, Release 6.1.x
62
enables each VPLS PE router to discover the other provider edge (PE) routers that are part of the same
VPLS domain.
routers forming a full mesh of PWs across PE routers in a VPLS domain
Implementing Multipoint Layer 2 Services