Additional EIGRP stuff (not on blueprint)

Site of Origin (SoO)

General information on “EIGRP Site of Origin (SoO)":

• Assigns each EIGRP route an extended community tag so that the origin site can be identified
• Useful for loop prevention, count-to-infinity and suboptimal routing on dual/multihomed sites
• Prevents advertised EIGRP prefixes from getting advertised back by the PEs to the originating site
• The configured SoO applies to all routes originated by the CEs (IPv4 and IPv6)
• Important: Configuration of SoO must be done on the PE routers towards the CE routers!

“EIGRP Site of Origin (SoO)” CLI configuration commands:

## Configuring a route map to apply a SoO tag
Router(config)# route-map [NAME]
Router(config-route-map)# set extcommunity soo <value>

## Applying the route map on an interface on the PE routers towards the CE routers
Router(config)# interface <if>
Router(config-if)# ip vrf sitemap [ROUTE-MAP-NAME]