Virtual Private LAN Services
7750 SR OS Services Guide Page 647
split-horizon-group
Syntax split-horizon-group group-name
no split-horizon-group
Context config>service>vpls>site
Description This command configures the value of split-horizon group associated with this site.
The no form of the command reverts the default.
Default no split-horizon-group
Parameters group-name — Specifies a split-horizon group name.
spoke-sdp
Syntax spoke-sdp sdp-id:vc-id
no spoke-sdp
Context config>service>vpls>site
Description This command binds a service to an existing Service Distribution Point (SDP).
The no form of the command removes the parameter from the configuration.
split-horizon-group
Syntax [no] split-horizon-group [group-name] [residential-group]
Context config>service>vpls
Description This command creates a new split horizon group for the VPLS instance. Traffic arriving on a SAP or
spoke SDP within this split horizon group will not be copied to other SAPs or spoke SDPs in the same
split horizon group.
A split horizon group must be created before SAPs and spoke SDPs can be assigned to the group.
The split horizon group is defined within the context of a single VPLS. The same group-name can be
re-used in different VPLS instances.
Up to 30 split horizon groups can be defined per VPLS instance. Half are supported in i-VPLS.
The no form of the command removes the group name from the configuration.
Parameters group-name — Specifies the name of the split horizon group to which the SDP belongs.
residential-group — Defines a split horizon group as a residential split horizon group (RSHG). Doing
so entails that:
a) SAPs which are members of this Residential Split Horizon Group will have:
– Double-pass queuing at ingress as default setting (can be disabled)
– STP disabled (cannot be enabled)
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