LINKGROUPS

Combination of two or more links into a single logical link is called linkgroup
Advantages of linkgroup are
1) Increased Capacity of the data and
2) Provides Redundancy incase of failover

There are Two classes of linkgroups that are defined in Ericsson Redback Routers

·      Access LAG - These are used for subscriber links.

·      Trunk LAG  - These are intended for trunk (router to router) links. Trunk LAGs are further divided into Ethernet or Dot1Q (VLAN) types. 

- Ether link-groups : This type of link-group supports only links carrying untagged traffic.

  Config Example:     link-group <lgname> ether

                             interface <intname> local

- Dot1q link-groups: These are an enhancement of Ether linkgroups. Where ether linkgroup support only untagged traffic, dot1q link-groups support both tagged and untagged traffic.

Config Example : link-group <lgname> dot1q

                             encapsulation dot1q

                           interface untagged local

                             dot1q pvc 10

                           interface pvc10 local

                             dot1q pvc 20

                           interface pvc20 local