Figure 22: Lag On Access Interconnection; Figure 23: Lag On Access Failure Switchover - Alcatel-Lucent 7750 SR OS Interface Configuration Manual

LAG
This way, QoS enforcement constraints are respected, while the maximum of available links is
utilized.
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:
•
•
•
Page 114
HGW
DSLAM
HGW
Lag

Figure 22: LAG on Access Interconnection

HGW
DSLAM
HGW
Lag

Figure 23: LAG on Access Failure Switchover

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:
Active
IOM-A
PE
IOM-B
Stby
Stby
IOM-A
PE
IOM-B
Active
7750 SR OS Interface Configuration Guide
Provider
Network
OSSG095
Provider
Network
OSSG096