Alcatel-Lucent 7210 SAS M Service Manual page 666

VPRN Service Configuration Commands
This configuration parameter can be set at three levels: global level (applies to all peers), group level
(applies to all peers in peer-group) or neighbor level (only applies to specified peer). Thus, by
specifying this at each neighbor level, it is possible to have a separate as-number per EBGP session.
When a command is entered multiple times for the same AS, the last command entered is used in the
configuration. The private attribute can be added or removed dynamically by reissuing the command.
Changing the local AS at the global level in an active BGP instance causes the BGP instance to restart
with the new local AS number. Changing the local AS at the global level in an active BGP instance
causes BGP to re-establish the peer relationships with all peers in the group with the new local AS
number. Changing the local AS at the neighbor level in an active BGP instance causes BGP to re-
establish the peer relationship with the new local AS number.
This is an optional command and can be used in the following circumstance:
Provider router P is moved from AS1 to AS2. The customer router that is connected to P, however, is
configured to belong to AS1. To avoid reconfiguring the customer router, the local-as value on router
P can be set to AS1. Thus, router P adds AS1 to the as-path message for routes it advertises to the
customer router.
The no form of the command used at the global level will remove any virtual AS number configured.
The no form of the command used at the group level reverts to the value defined at the global level.
The no form of the command used at the neighbor level reverts to the value defined at the group level.
no local-as
Default
as-number — The virtual autonomous system number, expressed as a decimal integer.
Parameters
private — Specifies the local-as is hidden in paths learned from the peering.
local-preference
Syntax local-preference local-preference
no local-preference
Context config>service>vprn>bgp
config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
This command enables setting the BGP local-preference attribute in incoming routes if not specified
Description
and configures the default value for the attribute. This value is used if the BGP route arrives from a
BGP peer without the local-preference integer set.
The specified value can be overridden by any value set via a route policy. This configuration
parameter can be set at three levels: global level (applies to all peers), group level (applies to all peers
in peer-group) or neighbor level (only applies to specified peer). The most specific value is used.
The no form of the command at the global level specifies that incoming routes with local-preference
set are not overridden and routes arriving without local-preference set are interpreted as if the route
had local-preference value of 100.
The no form of the command used at the group level reverts to the value defined at the global level.
The no form of the command used at the neighbor level reverts to the value defined at the group level.
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Values
7210 SAS M Services Guide