Alcatel-Lucent 7450 Configuration Manual page 190
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Router Interface Commands
Unlike other commands and parameters where the default state is not indicated in the configuration
file, shutdown and no shutdown are always indicated in system generated configuration files.
The no form of the command puts an entity into the administratively enabled state.
Default
no shutdown
if-attribute
Syntax
if-attribute
Context
config>router
config>router>interface
config>service>ies>interface
config>service>vprn>interface
Description
This command creates the context to configure or apply IP interface attributes such as administrative
group (admin-group) or Shared Risk Loss Group (SRLG).
admin-group
Syntax
admin-group group-name value group-value
no admin-group group-name
Context
config>router>if-attribute
Description
This command defines an administrative group (admin-group) that can be associated with an IP or
MPLS interface.
Admin groups, also known as affinity, are used to tag IP and MPLS interfaces that share a specific
characteristic with the same identifier. For example, an admin group identifier can represent all links
that connect to core routers, or all links that have a bandwidth higher than 10G, or all links that 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 IES, VPRN, 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 that satisfies the admin-
group include and exclude constraints.
When applied to IES, VPRN, or 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 re-uses the same name but with a different group value than an
existing group. The system will also reject the creation of an admin-group if it re-uses the same group
value but with a different name than an existing group.
Page 190
7450 ESS Router Configuration Guide
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