Set Bgp Administrative Distance - Cisco NCS 5500 Series Configuration Manual

Implementing BGP
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
Distance
External
Internal
Local
Distance does not influence the BGP path selection algorithm, but it does influence whether BGP-learned
Note
routes are installed in the IP routing table.
Perform this task to specify the use of administrative distances that can be used to prefer one class of route
over another.
Default Value
20
200
200
BGP Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.2.x
Set BGP Administrative Distance
Function
Applied to routes learned from
eBGP.
Applied to routes learned from
iBGP.
Applied to routes originated by the
router.
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