if-attribute
config>router
config>router>interface
Supported on all 7210 SAS platforms as described in this document
Commands in this context configure or apply IP interface attributes such as administrative group (admin-group) or Shared Risk Loss Group (SRLG).
admin-group group-name value group-value
no admin-group group-name
config>router>if-attribute
Supported on all 7210 SAS platforms as described in this document
This command defines an administrative group (admin-group) which can be associated with an IP or MPLS interface.
Admin groups, also known as affinity, are used to tag IP and MPLS interfaces which share a specific characteristic with the same identifier. For example, an admin group identifier could represent all links which connect to core routers, all links which have bandwidth higher than 10G, or all links which are dedicated to a specific service.
The user first configures locally on each router the name and identifier of each admin group. A maximum of 32 admin groups can be configured per system.
The user then configures the admin group membership of an interface. The user can apply admin groups to a network IP or MPLS interface.
When applied to MPLS interfaces, the interfaces can be included or excluded in the LSP path definition by inferring the admin group name. CSPF will compute a path which satisfies the admin group include and exclude constraints.
When applied to network IP interfaces, the interfaces can be included or excluded in the route next-hop selection by inferring the admin group name in a route next-hop policy template applied to an interface or a set of prefixes.
The following provisioning rules are applied to admin group configuration. The system will reject the creation of an admin group if it reuses the same name or group value as an existing group.
Only admin groups bound to an MPLS interface are advertised in TE link TLVs and sub-TLVs when the traffic-engineering option is enabled in IS-IS or OSPF.
Specifies the name of the administrative group. The association of the group name and value should be unique within an IP/MPLS domain, up to 32 characters maximum.
Specifies the value associated with the group. The association of the group name and value should be unique within an IP/MPLS domain.
srlg-group group-name value group-value
no srlg-group group-name
config>router>if-attribute
Supported on all 7210 SAS platforms as described in this document
This command defines a Shared Risk Loss Group (SRLG) which can be associated with an IP or MPLS interface.
SRLG is used to tag IP or MPLS interfaces that share a specific fate with the same identifier. For example, an SRLG group identifier could represent all links which use separate fibers but are carried in the same fiber conduit. If the conduit is accidentally cut, all the fiber links are cut which means that all interfaces using these fiber links will fail.
The user first configures locally on each router the name and identifier of each SRLG group. A maximum of 1024 SRLGs can be configured per system.
The user then configures the SRLG membership of an interface. The user can apply SRLGs to a network IP or MPLS interface. A maximum of 64 SRLGs can be applied to a specific interface.
When SRLGs are applied to MPLS interfaces, CSPF at LER will exclude the SRLGs of interfaces used by the LSP primary path when computing the path of the secondary path. CSPF at a LER or LSR will also exclude the SRLGs of the outgoing interface of the primary LSP path in the computation of the path of the FRR backup LSP. This provides path disjointness between the primary path and the secondary path or FRR backup path of an LSP.
When SRLGs are applied to network IP interfaces, they are evaluated in the route next-hop selection by adding the srlg-enable option in a route next-hop policy template applied to an interface or a set of prefixes. For instance, the user can enable the SRLG constraint to select a LFA next-hop for a prefix which avoids all interfaces that share fate with the primary next-hop.
The following provisioning rules are applied to SRLG configuration. The system will reject the creation of a SRLG if it reuses the same name but with a different group value than an existing group. The system will also reject the creation of an SRLG if it reuses the same group value but with a different name than an existing group.
Only the SRLGs bound to an MPLS interface are advertised in TE link TLVs and sub-TLVs when the traffic-engineering option is enabled in IS-IS or OSPF.
Specifies the name of the administrative group. The association of the group name and value should be unique within an IP/MPLS domain, up to 32 characters maximum.
Specifies the value associated with the group. The association of the group name and value should be unique within an IP/MPLS domain.
[no] admin-group group-name [group-name ... (up to 5 max)]
no admin-group
config>router>interface>if-attribute
Supported on all 7210 SAS platforms as described in this document
This command configures the admin group membership of an interface. The user can apply admin groups to a network IP or MPLS interface.
Each single operation of the admin-group command allows a maximum of 5 groups to be specified at a time. However, a maximum of 32 groups can be added to a specific interface through multiple operations. When an admin group is bound to one or more interfaces, its value cannot be changed until all bindings are removed.
The configured admin group membership will be applied in all levels/areas the interface is participating in. The same interface cannot have different memberships in different levels/areas.
Only admin groups bound to an MPLS interface are advertised in TE link TLVs and sub-TLVs when the traffic-engineering option is enabled in IS-IS or OSPF.
The no form of this command deletes one or more of the admin-group memberships of an interface. The user can also delete all memberships of an interface by not specifying a group name.
Specifies the name of an admin-group, up to 32 characters maximum.
[no] srlg-group group-name [group-name ... (up to 5 max)]
no srlg-group
config>router>interface>if-attribute
Supported on all 7210 SAS platforms as described in this document
This command configures the SRLG membership of an interface. The user can apply SRLGs to a network IP or MPLS interface.
An interface can belong to a maximum of 64 SRLG groups. However, each single operation of the srlg-group command allows a maximum of 5 groups to be specified at a time. When an SRLG group is bound to one or more interfaces, its value cannot be changed until all bindings are removed.
The configured SRLG membership will be applied in all levels/areas the interface is participating in. The same interface cannot have different memberships in different levels/areas.
Only the SRLGs bound to an MPLS interface are advertised in TE link TLVs and sub-TLVs when the traffic-engineering option is enabled in IS-IS or OSPF.
The no form of this command deletes one or more of the SRLG memberships of an interface. The user can also delete all memberships of an interface by not specifying a group name.
Specifies the name of an SRLG, up to 32 characters maximum.