Alcatel-Lucent 7750 - Figure 28: MC-LAG L2 Dual Homing to Local PE-Pairs

Multi-Chassis LAG
Page 142 7750 SR Interface Configuration Guide
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Figure 28: MC-LAG L2 Dual Homing to Local PE-Pairs
The forwarding behavior of the nodes abide by the following principles. Note that logical
destination (actual forwarding decision) is primarily determined by the service (VPLS or VLL)
and the principle below applies only if destination or source is based on MC-LAG:
• Packets received from the network will be forwarded to all local active links of the given
destination-sap based on conversation hashing. In case there are no local active links, the
packets will be cross-connected to inter-chassis pseudowire.
• Packets received from the MC-LAG sap will be forwarded to active destination pseudo-
wire or active local links of destination-sap. In case there are no such objects available at
the local node, the packets will be cross-connected to inter-chassis pseudowire.
MSANPW
MC-
LAG
MSANA
PE-A
PE-B
MC-
LAG
PWB
MSAN
MSAN
PE-A
PE-B
MC-
LAG
PWMSANC
PE-A
PW
PW
MSAN
MC-
LAG
PE-B
MC-
LAG
PE-C
Fig_7