CLI Guide

Layer 3 Routing Commands 1354
User Guidelines
The site of origin (SOO) extended communities attribute is configured with
the soo keyword. This attribute uniquely identifies the site from which the
Provider Edge (PE) router learned the route. All routes learned from a
particular site must be assigned the same SOO extended community
attribute, whether a site is connected to a single PE router or multiple PE
routers. Configuring this attribute prevents routing loops from occurring
when a site is multi-homed. The SOO extended community attribute is
configured on the interface and is propagated into BGP through
redistribution. The SOO can be applied to routes that are learned from VRFs.
The SOO should not be configured for stub sites or sites that are not multi-
homed
Command History
Introduced in version 6.3.0.1 firmware. Command updated in version 6.6
firmware.
Example
The following example shows how to set the extended community attribute
for site of origin with route-maps on the sending BGP router.
(R1)(Config)# ip extcommunity-list 10 permit
(R1)(config)# route-map RECV_IN permit 10
(R1)(config-route-map)# set extcommunity soo 10:10
(R1)(config-route-map)# exit
The receiving BGP router will apply the route map with an extended
community list in the inward direction.
show bgp ipv6
Use this command to display IPv6 routes in the BGP routing table. This
command deprecates and replaces the show ipv6 bgp command.
Syntax
show bgp ipv6[ipv6-prefix/prefix-length [ longer-prefixes | shorter-prefixes [
length ] ] | filter-list as-path-list ]