On the PE5 router, which statement Is correct regarding the learned BGP prefixes?
A.
The 209.165.201.0/27 prefix is received from the 10.0.1.1 IBGP peer which is a route reflector
B.
The 172.16.66.0/24 prefix BGP next-hop points to the route reflector
C.
All prefixes learned on PE5 has the default local prefernce value
D.
The 209.165.202.128/27 prefix is originated by the 10.0.1.1 IBGP peer
Explanation:
#show ip bgp– check i tag for PE5
Use the show bgp command to display all routes in the specified BGP routing table.
RP/0/RP0/CPU0:router# show bgp
BGP router identifier 172.20.1.1, local AS number 1820
BGP generic scan interval 60 secs
BGP table state: Active
Table ID: 0xe0000000
BGP main routing table version 3
Dampening enabled
BGP scan interval 60 secs
Status codes: s suppressed, d damped, h history, * valid, > best
i – internal, S stale
Origin codes: i – IGP, e – EGP, ? – incomplete
Network Next-hop Metric LocPrf Weight Path
* i10.3.0.0/16 172.20.22.1 0 100 0 1800 1239 ?
*>i 172.20.16.1 0 100 0 1800 1239 ?
* i10.6.0.0/16 172.20.22.1 0 100 0 1800 690 568 ?
*>i 172.20.16.1 0 100 0 1800 690 568 ?
If A were true (substitute IP addresses 10.0.0.1 and ASN path below for ones in above diagram):
RP/0/RSP0/CPU0:PE# show bgp 209.165.201.0/27
BGP routing table entry for 209.165.201.0/27
10.0.0.1 (metric 2) from 10.0.0.1(10.0.0.1)
Origin IGP, metric 0, localpref 100, valid, internal
Received Path ID 0, Local Path ID 0, version 0
Originator: 10.0.0.1, Cluster list: 0.0.0.17
For D:
show bgp 209.165.201.128/27 and look for Originator