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BGP routing update in RR

  • if an update come from eBGP peer, advertise to eBGP, iBGP, and RR Client

  • if an update come from RR client, advertise to eBGP, iBGP, and RR client except the RR client who send the update

  • if an update come from iBGP, advertise to eBGP and RR client

    • March 8th, 2010 Posted by Anthony Fajri| ccie | no comments

    BGP Peer Method

  • Full Mesh

  • Single route reflector

  • Clustered route reflectors

  • Redundant route reflectors

  • Confederation

  • Hybrid architectures (route reflector cluster and confederation)

    • March 8th, 2010 Posted by Anthony Fajri| ccie | no comments

    Unicast Reverse Path Forwarding

    uRPF is used to verify the reachability of the source address in packets being forwarded. If the source IP is not valid, the the packet will be discarded.

    uRPF can work in 3 modes:

  • strict mode

    • in this mode, the packet must be received on the interface that the router would use to forward the return packet.
    this mode can be configured as following:

    interface FastEthernet 0/0
    ip verify unicast source reachable-via rx

  • loose mode

    • in this mode, the source address must appear in the routing table
    this mode can be configured as following:

    interface FastEthernet 0/0
    ip verify unicast source reachable-via any

  • vrf mode


    • Reference: Cisco

    March 8th, 2010 Posted by Anthony Fajri| ccie | no comments

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