Cisco NCS 5500 Series

Configures the BGP software to ignore the autonomous system length when performing best-path selection.
Step 7
bgp bestpath compare-routerid
Example:
RP/0/RP0/CPU0:router(config-bgp)# bgp bestpath compare-routerid
Configure the BGP speaker in the autonomous system to compare the router IDs of similar paths.
Step 8
commit
Set BGP Administrative Distance
An administrative distance is a rating of the trustworthiness of a routing information source. In general, the
higher the value, the lower the trust rating. Normally, a route can be learned through more than one protocol.
Administrative distance is used to discriminate between routes learned from more than one protocol. The
route with the lowest administrative distance is installed in the IP routing table. By default, BGP uses the
administrative distances shown in here:
Table 3: BGP Default Administrative Distances
FunctionDefault ValueDistance
Applied to routes learned from
eBGP.
20External
Applied to routes learned from
iBGP.
200Internal
Applied to routes originated by the
router.
200Local
Distance does not influence the BGP path selection algorithm, but it does influence whether BGP-learned
routes are installed in the IP routing table.
Note
Perform this task to specify the use of administrative distances that can be used to prefer one class of route
over another.
BGP Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.2.x
13
Implementing BGP
Set BGP Administrative Distance