LAG
Page 114 7750 SR OS Interface Configuration Guide
This way, QoS enforcement constraints are respected, while the maximum of available links is
utilized.
Figure 22: LAG on Access Interconnection
Figure 23: LAG on Access Failure Switchover
LACP is used to make selection of active links predictable and compatible with any vendor
equipment. Refer to the IEEE STD 802.3-2002, Section 3, Clause 43.6.1 standard which describes
how LACP allows stand-by and active signalling.
The 7750 SR OS implementation of LACP supports the following:
• A given LAG member can be assigned to sub-groups. The selection algorithm then
assures that only members of a single sub-group are selected as active links.
• The selection algorithm is effective only if LACP is enabled on a given LAG. At the same
time, it is assumed that connected system has also LACP enabled (active or passive
mode).
• The algorithm will select active links based on following criteria:
DSLAM
Lag Stby
Active
OSSG095
HGW
HGW
Provider
Network
PE
IOM-A
IOM-B
DSLAM
Lag
Stby
Active
OSSG096
HGW
HGW
Provider
Network
PE
IOM-A
IOM-B