Panasonic NN46240-710 - Manual (Page 164)

Nortel Secure Router 8000 Series
Troubleshooting - VPN___________ 5 VPLS troubleshooting
This networking simulates the three constitutional parts of a VPLS networking: PE, provider
router (P), and CE.
This solution also meets the conditions of making a VPLS VSI Up: tunnel, AC access, and PW.
Hierarchical VPLS
Figure 5-2 Hierarchical VPLS Networking
PE1
Core layer''
Convergence
layer
Convergence
layer i
CE1 CE2
The traditional LDP signaling requires that:
• PEs fully connect in a VPLS.
• Each PE is specified with a peer.
The configuration is quite arduous, and requires higher performance of individual PEs.
To rectify this problem, you can use hierarchical VPLS. The PEs in the network core still fully
connect. A PE, as the user convergence device, only needs to be specified as a Underlayer PE
(UPE) on its directly connected Superstratum PE (SPE).
Issue 5.3 (30 March 2009) Nortel Networks Inc. 5-5