H3C Technologies H3C S12500-X Series Switches - Manual (Page 256)

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Figure 66 Intra-domain multi-segment PW
Inter-domain multi-segment PW
An inter-domain multi-segment PW has concatenated PWs in different ASs, and is a method for inter-AS
option B networking.
As shown in
Figure 67 , you can create an inter-domain multi-segment PW between PE 1 and PE 2 in
different ASs by concatenating PW 1 and PW 2 on ASBR 1 and concatenating PW 2 and PW 3 on
ASBR 2.
Figure 67 Inter-domain multi-segment PW
MPLS L2VPN configuration task list
To establish an MPLS L2VPN, you must complete the following tasks:
• Configure an IGP to achieve IP connectivity within the backbone.
• Configure basic MPLS, LDP, or MPLS TE to set up public tunnels across the backbone.
• Configure MPLS L2VPN on the PEs, including setting up PWs, and binding ACs to PWs.
This chapter only describes MPLS L2VPN configurations on the PEs.
CE 1
PE 4
PE 1 PE 2
CE 2
MPLS or IP backbone
PE 3
Tunnel
T
u
nn
el
PW 1
PW 2
PW