Question 178 of 250 from exam 400-201: Cisco CCIE Service Provider Written Exam

Question 178 of 250 from exam 400-201: Cisco CCIE Service Provider Written Exam

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Question

Refer to the exhibit.

Router RR1 is not able to select a best path for prefix 11.11.11.0/24

What is the root cause of this issue?

2.2.2.2/24 11.11.11.0/24 Sa. AS 10 RRIF ip prefix-list FILTER permit 0.0.0.0/0 ge 32 ! route-map FILTER permit 10 match ip address prefix-list FILTER ! router bgp 10 no bgp default ipv4-unicast neighbor 2.2.2.2 remote-as 10 neighbor 2.2.2.2 update-source Loopback neighbor 4.4.4.4 remote-as 10 neighbor 4.4.4.4 update-source LoopbackO ! address-family ipv4 bgp nexthop route-map FILTER neighbor 2.2.2.2 activate neighbor 2.2.2.2 route-reflector-client neighbor 4.4.4.4 activate neighbor 4.4.4.4 route-reflector-client exit-address-family RRI# sh bgp ipv uni sum BGP router identifier 1.1.1.1, local AS number 10 BGP table version is 3, main routing table version 3 1 network entries using 140 bytes of memory 2 path entries using 160 bytes of memory 1/0 BGP path’bestpath attribute entries using 152 bytes of memory 1 BGP AS-PATH entries using 24 bytes of memory O BGP route-map cache entries using 0 bytes of memory O BGP filter-tist cache entries using 0 bytes of memory BGP using 476 total bytes of memory BGP activity 1/0 prefixes, 2/0 paths, scan interval 60 secg ‘Neighbor V AS MsgRevd MsgSent TbiVer InQ OutQ Up/Dowm State PARed 2222 41011 M3 0 = 00007:19 1 4444 410 9 9 3 0 — 0.00:04:23 1 RR1# sh bgp ipv4 uni 11.11.11.0 BGP routing table entry for 11.11.11.0/24, version 3 Paths: (2 available, no best path) ‘Not advertised to any peer Refresh Epoch 1 1, Received from a RR-client) 4.4.4.4 Gnaccessible) from 4.4.4.4 (4.4.4.4) Origin IGP, metric 0, localpref 100, valid, internal rx pathid: 0, tx pathid: 0 Refresh Epoch 1 1, Received from a RR-client) 2.2.2.2 Gnaccessible) from 2.2.2.2 (2.2.2.2) Origin IGP, metric 0, localpref 100, valid, internal 1x pathid: 0, tx pathid: 0

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