300-410 ENARSI: Implementing Cisco Enterprise Advanced Routing and ServicesDemo

By Cisco · Question Mode

QuestionQ224

Layer 3 Technologies

Refer to the exhibit.

RR configuration:

router bgp 100  
neighbor IBGP peer-group  
neighbor IBGP route-reflector-client  
neighbor 10.1.1.1 remote-as 100  
neighbor 10.1.2.2 remote-as 100  
neighbor 10.1.3.3 remote-as 100

The network administrator configured the network to provide connectivity between all devices and observes that the ASBRs have no routes to one another. Which configuration set resolves the issue?

Question Image

  • A router bgp 100 neighbor IBGP update-source Loopback0
  • B router bgp 100 neighbor IBGP next-hop-self
  • C router bgp 100 neighbor 10.1.1.1 next-hop-self neighbor 10.1.2.2 next-hop-self neighbor 10.1.3.3 next-hop-self
  • D router bgp 100 neighbor 10.1.1.1 peer-group IBGP neighbor 10.1.2.2 peer-group IBGP neighbor 10.1.3.3 peer-group IBGP
Explanation

A BGP peer group applies its settings only to neighbors that are assigned to that group. The three iBGP neighbors must be placed in the IBGP peer group so they inherit route-reflector-client; this allows the route reflector to advertise routes learned from one client to the other clients without requiring a full iBGP mesh. Cisco documents neighbor {ip-address | peer-group-name} route-reflector-client as the command that configures a neighbor or peer group as route-reflector clients.

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