Configuring an additional metric for a RIP interface

Network requirements

As shown in Figure 9, run RIPv2 on all the interfaces of Switch A, Switch B, Switch C, Switch D, and Switch E.

Switch A has two links to Switch D. The link from Switch B to Switch D is more stable than that from Switch C to Switch D. Configure an additional metric for RIP routes received from VLAN-interface 200 on Switch A so Switch A prefers route 1.1.5.0/24 learned from Switch B.

Figure 9: Network diagram

Configuration procedure

  1. Configure IP addresses for interfaces. (Details not shown.)

  2. Configure basic RIP:

    # Configure Switch A.

    <SwitchA> system-view
    [SwitchA] rip 1
    [SwitchA-rip-1] network 1.0.0.0
    [SwitchA-rip-1] version 2
    [SwitchA-rip-1] undo summary
    [SwitchA-rip-1] quit
    

    # Configure Switch B.

    <SwitchB> system-view
    [SwitchB] rip 1
    [SwitchB-rip-1] network 1.0.0.0
    [SwitchB-rip-1] version 2
    [SwitchB-rip-1] undo summary
    

    # Configure Switch C.

    <SwitchC> system-view
    [SwitchB] rip 1
    [SwitchC-rip-1] network 1.0.0.0
    [SwitchC-rip-1] version 2
    [SwitchC-rip-1] undo summary
    

    # Configure Switch D.

    <SwitchD> system-view
    [SwitchD] rip 1
    [SwitchD-rip-1] network 1.0.0.0
    [SwitchD-rip-1] version 2
    [SwitchD-rip-1] undo summary
    

    # Configure Switch E.

    <SwitchE> system-view
    [SwitchE] rip 1
    [SwitchE-rip-1] network 1.0.0.0
    [SwitchE-rip-1] version 2
    [SwitchE-rip-1] undo summary
    

    # Display all active routes in the RIP database on Switch A.

    [SwitchA] display rip 1 database
       1.0.0.0/8, auto-summary
           1.1.1.0/24, cost 0, nexthop 1.1.1.1, RIP-interface
           1.1.2.0/24, cost 0, nexthop 1.1.2.1, RIP-interface
           1.1.3.0/24, cost 1, nexthop 1.1.1.2
           1.1.4.0/24, cost 1, nexthop 1.1.2.2
           1.1.5.0/24, cost 2, nexthop 1.1.1.2
           1.1.5.0/24, cost 2, nexthop 1.1.2.2
    

    The output shows two RIP routes destined for network 1.1.5.0/24, with the next hops as Switch B (1.1.1.2) and Switch C (1.1.2.2), and with the same cost of 2.

  3. Configure an additional metric for a RIP interface:

    # Configure an inbound additional metric of 3 for RIP-enabled interface VLAN-interface 200 on Switch A.

    [SwitchA] interface vlan-interface 200
    [SwitchA-Vlan-interface200] rip metricin 3
    

    # Display all active routes in the RIP database on Switch A.

    [SwitchA-Vlan-interface200] display rip 1 database
       1.0.0.0/8, auto-summary
           1.1.1.0/24, cost 0, nexthop 1.1.1.1, RIP-interface
           1.1.2.0/24, cost 0, nexthop 1.1.2.1, RIP-interface
           1.1.3.0/24, cost 1, nexthop 1.1.1.2
           1.1.4.0/24, cost 2, nexthop 1.1.1.2
           1.1.5.0/24, cost 2, nexthop 1.1.1.2
    

    The output shows that only one RIP route reaches network 1.1.5.0/24, with the next hop as Switch B (1.1.1.2) and a cost of 2.