Interface Configuration Guide 7705 SAR Interfaces
Edition: 01 3HE 11011 AAAC TQZZA 107
Figure 9 LAG on Access Interconnection
Figure 10 LAG on Access Failure Switchover
LACP handles active/standby operation of LAG subgroups as follows.
• Each link in a LAG is assigned to a subgroup. On access, network, and hybrid
ports, a LAG can have a maximum of four subgroups and a subgroup can have
up to the maximum number of links supported for the LAG. The selection
algorithm implemented by LACP ensures that only one subgroup in a LAG is
selected as active.
• The algorithm selects the active link as follows.
− If multiple subgroups satisfy the selection criteria, the subgroup currently
active remains active. Initially, the subgroup containing the highest-priority
(lowest value) eligible link is selected as active.
Provider
network
22319
HGW
Stby
Active
LAG
PE
DSLAM
MDA-B
MDA-A
HGW
Provider
network
22320
HGW
ActiveLAG
PE
DSLAM
MDA-B
MDA-A
HGW
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