Configuring basic RIP

As shown in Figure 7, enable RIPv2 on all interfaces on Switch A and Switch B. Configure Switch B to not advertise route 10.2.1.0/24 to Switch A, and to accept only route 2.1.1.0/24 from Switch A.

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

2. Configure basic RIP by using either of the following methods:

   (Method 1) # Enable RIP on the specified networks on Switch A.

   <SwitchA> system-view
   [SwitchA] rip
   [SwitchA-rip-1] network 192.168.1.0
   [SwitchA-rip-1] network 172.16.0.0
   [SwitchA-rip-1] network 172.17.0.0
   [SwitchA-rip-1] quit
   

   (Method 2) # Enable RIP on the specified interfaces on Switch B.

   <SwitchB> system-view
   [SwitchB] rip
   [SwitchB-rip-1] quit
   [SwitchB] interface vlan-interface 100
   [SwitchB-Vlan-interface100] rip 1 enable
   [SwitchB-Vlan-interface100] quit
   [SwitchB] interface vlan-interface 101
   [SwitchB-Vlan-interface101] rip 1 enable
   [SwitchB-Vlan-interface101] quit
   [SwitchB] interface vlan-interface 102
   [SwitchB-Vlan-interface102] rip 1 enable
   [SwitchB-Vlan-interface102] quit
   

   # Display the RIP routing table of Switch A.

   [SwitchA] display rip 1 route
    Route Flags: R - RIP
                 A - Aging, S - Suppressed, G - Garbage-collect
                 O - Optimal, F - Flush to RIB
    ----------------------------------------------------------------------------
    Peer 192.168.1.2  on Vlan-interface100
         Destination/Mask        Nexthop           Cost    Tag     Flags   Sec
         10.0.0.0/8              192.168.1.2       1       0       RAOF    11
   

   The output shows that RIPv1 uses a natural mask.

3. Configure a RIP version:

   # Configure RIPv2 on Switch A.

   [SwitchA] rip
   [SwitchA-rip-1] version 2
   [SwitchA-rip-1] undo summary
   [SwitchA-rip-1] quit
   

   # Configure RIPv2 on Switch B.

   [SwitchB] rip
   [SwitchB-rip-1] version 2
   [SwitchB-rip-1] undo summary
   [SwitchB-rip-1] quit
   

   # Display the RIP routing table on Switch A.

   [SwitchA] display rip 1 route
    Route Flags: R - RIP
                 A - Aging, S - Suppressed, G - Garbage-collect
                 O - Optimal, F - Flush to RIB
    ----------------------------------------------------------------------------
   
    Peer 192.168.1.2 on Vlan-interface100
         Destination/Mask        Nexthop           Cost    Tag     Flags   Sec
         10.0.0.0/8              192.168.1.2       1       0       RAOF    50
         10.2.1.0/24             192.168.1.2       1       0       RAOF    16
         10.1.1.0/24             192.168.1.2       1       0       RAOF    16
   

   The output shows that RIPv2 uses classless subnet masks.

   # Display the RIP routing table on Switch B.

    Route Flags: R - RIP
                 A - Aging, S - Suppressed, G - Garbage-collect
                 O - Optimal, F - Flush to RIB
    ----------------------------------------------------------------------------
    Peer 192.168.1.3 on Vlan-interface100
         Destination/Mask        Nexthop           Cost    Tag     Flags   Sec
         172.16.1.0/24           192.168.1.3       1       0       RAOF    19
         172.17.1.0/24           192.168.1.3       1       0       RAOF    19
   

	NOTE: After RIPv2 is configured, RIPv1 routes might still exist in the routing table until they are aged out.

1. Configure route filtering:

   # Reference IP prefix lists on Switch B to filter received and redistributed routes.

   [SwitchB] ip prefix-list aaa index 10 permit 172.16.1.0 24
   [SwitchB] ip prefix-list bbb index 10 permit 10.1.1.0 24
   [SwitchB] rip 1
   [SwitchB-rip-1] filter-policy prefix-list aaa import
   [SwitchB-rip-1] filter-policy prefix-list bbb export
   [SwitchB-rip-1] quit
   

   # Display the RIP routing table on Switch A.

   [SwitchA] display rip 100 route
    Route Flags: R - RIP
                 A - Aging, S - Suppressed, G - Garbage-collect
                 O - Optimal, F - Flush to RIB
    ----------------------------------------------------------------------------
    Peer 192.168.1.2 on Vlan-interface100
         Destination/Mask        Nexthop           Cost    Tag     Flags   Sec
         10.1.1.0/24             192.168.1.2       1       0       RAOF    19
   

   # Display the RIP routing table on Switch B.

   [SwitchB] display rip 1 route
    Route Flags: R - RIP
                 A - Aging, S - Suppressed, G - Garbage-collect
                 O - Optimal, F - Flush to RIB
    ----------------------------------------------------------------------------
    Peer 192.168.1.3 on Vlan-interface100
         Destination/Mask        Nexthop           Cost    Tag     Flags   Sec
         172.16.1.0/24           192.168.1.3       1       0       RAOF    19