Alcatel-Lucent 7750 SR Manual page 1385

For EBGP peers, the peer AS number configured must be different from the autonomous system
number configured for this router under the global level since the peer will be in a different
autonomous system than this router
For IBGP peers, the peer AS number must be the same as the autonomous system number of this
router configured under the global level.
This is a required command for each configured peer. This may be configured under the group level
for all neighbors in a particular group.
Default
No AS numbers are defined.
Parameters as-number — The autonomous system number, expressed as a decimal integer.
preference
Syntax [no] preference preference
Context config>service>vprn>bgp
config>service>vprn>bgp>group
Description
This command configures the route preference for routes learned from the configured peer(s).
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 lower the preference the higher the chance of the route being the active route. The OS assigns
BGP routes highest default preference compared to routes that are direct, static or learned via MPLS
or OSPF.
The no form of the command used at the global level reverts to default value.
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.
Default
170
Parameters
preference — The route preference, expressed as a decimal integer.
prefix-limit
Syntax prefix-limit limit
no prefix-limit
Context config>service>vprn>bgp>group
config>service>vprn>bgp>group>neighbor
Description
This command configures the maximum number of routes BGP can learn from a peer.
7750 SR OS Services Guide
Values 1 — 65535
Values
1 — 255
Virtual Private Routed Network Services
Page 1385