Refer to the exhibit. A network operator working for a telecommunication company with an employee id: 1234:56:789 is implementing a Cisco Unified MPLS solution. What is the effect of this implementation?
A.
BGP is deployed between the PEs and ABRs with RFC 9107.
B.
EIGRP is deployed between the PEs and ABRs with RFC 9107.
C.
OSPF is deployed between the PEs and ABRs with RFC 3107.
D.
IS-IS is deployed between the PEs and ABRs with RFC 3107.
Must be a typo. Answer A seems correct though.
https://www.cisco.com/c/en/us/support/docs/multiprotocol-label-switching-mpls/mpls/118846-config-mpls-00.html#anc8
"When you enable RFC 3107 on both BGP routers, the routers advertise to each other that they can then send MPLS labels with the routes. If the routers successfully negotiate their ability to send MPLS labels, the routers add MPLS labels to all outgoing BGP updates."
https://www.rfc-editor.org/rfc/rfc3107
per this Seamless MPLS draft, I am more it is IS-IS with RFC3107. There is explicitly stated.."MPLS deployment using ISIS as intradomain link-state routing protocol and using LDPfor MPLS label distribution is used"...
https://datatracker.ietf.org/doc/html/draft-ietf-mpls-seamless-mpls-03#section-5.1.3
so my vote here is for 'D'.
A it's right
To use seamless the routers (ABRs) that join the segments must be BGP inline route-reflectors and the RFC 9107 is defined to BGP RR
https://datatracker.ietf.org/doc/rfc9107/
https://www.cisco.com/c/en/us/support/docs/multiprotocol-label-switching-mpls/mpls/118846-config-mpls-00.html#anc8
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