Cisco BGP + MPLS Set 1

In large ATM-MPLS networks, the LFIB can become too large and it may be necessary to limit the maximum diameter of the MPLS LSPs. ✘ Because downstream-on-demand label allocation uses hop count to control loop detection, it maybenecessary to limit the maximum diameter of the MPLS network. ✘ Because end-to-end delay can cause problems with some voice applications, it may be necessary to limitthe maximum diameter of the MPLS network. ✘ When interconnecting large frame mode MPLS and cell mode networks it may be necessary to limit themaximum network diameter to prevent forwarding loops. ✔

routes from the client site, but not from the server site ✘ routes from the server site, but not from the client site ✘ routes from both the client site and the server site ✘ only EBGP routes from either the client site or the server site ✔

CE-1 ✘ CE-2 ✘ PE-1 ✘ PE-IG ✔ CE-1 and CE-2 ✔

The sanjose router will perform an outbound soft reconfig to the 10.1.1.1 neighbor. ✘ The sanjose router will send out the ORF prefix-list so that a new route refresh will be received from the1.1.1 neighbor. ✘ The 10.1.1.1 router will perform an inbound soft reconfig on the updates from the sanjose neighbor. ✘ The 10.1.1.1 router will send out the ORF prefix-list so that a new route refresh will be received from thesanjose neighbor. ✔ The bgp session between the sanjose and the 10.1.1.1 router will be reset so that all the new bgp updatesfrom the 10.1.1.1 router can be processed by the inbound prefix-list at the sanjose router. ✔

show ip bgp ✘ show ip bgp sum ✘ show ip route bgp ✘ show ip route {prefix} ✔ show ip bgp {prefix} ✔

router(config)#router bgp {as-number} ✘ router(config-router)#bgp confederation peers {as-number} ✘ router(config-router)#bgp confederation identifier {as-number} ✘ router(config-router)#bgp cluster-id {as-number} ✔ router(config-router)#neighbor {ip address} remote-as {as-number} ✔

half-life limit ✘ suppress limit ✘ max-suppress-time limit ✘ reuse limit ✔ unsuppress limit ✔

RD assignment ✘ selective routes export ✘ selective routes import ✘ MP-BGP route redistribution filtering ✔ CE-PE routing process ✔

using the default route ✘ using the IGP routes where the external networks are redistributed into the IGP by the edge routers ✘ using the EBGP routes where the external networks are redistributed into the IBGP by the edge routers ✘ using the IBGP routes, then using recursive lookup based on IGP information to resolve the BGP next-hop ✔

AS-Path Cluster ID Cluster List Originator ID Community ID