Information Technology Reference
In-Depth Information
RIPv2 messages include the subnet mask in a field in the routing updates. This allows sub-
nets and their masks to be included in the routing updates. However, by default, RIPv2
summarizes networks at major network boundaries, just like RIPv1, except that the subnet
mask is included in the update.
Verify that RIPv2 is running on the routers.
Step 2.
The
debug ip rip
,
show ip protocols
, and
show run
commands can all be used to confirm
that RIPv2 is running. The output of the
show ip protocols
command for R1 is as follows:
R1#
show ip protocols
Routing Protocol is “rip”
Sending updates every 30 seconds, next due in 7 seconds
Invalid after 180 seconds, hold down 180, flushed after 240
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Redistributing: rip
Default version control: send version 2, receive 2
Interface Send Recv Triggered RIP Key-chain
FastEthernet0/0 2 2
FastEthernet0/1 2 2
Serial0/0/0 2 2
Automatic network summarization is in effect
Maximum path: 4
Routing for Networks:
172.30.0.0
209.165.200.0
Passive Interface(s):
FastEthernet0/0
FastEthernet0/1
Routing Information Sources:
Gateway Distance Last Update
209.165.200.229 120
Distance: (default is 120)
Task 5: Examine the Automatic Summarization of Routes
The LANs connected to R1 and R3 are still composed of discontiguous networks. R2 still shows two
equal-cost paths to the 172.30.0.0/16 network in the routing table. R2 still shows only the major class-
ful network address of 172.30.0.0 and does not show any of the subnets for this network.
R2#
show ip route
Output omitted
10.0.0.0/16 is subnetted, 1 subnets
C 10.1.0.0 is directly connected, FastEthernet0/0
R 172.30.0.0/16 [120/1] via 209.165.200.230, 00:00:07, Serial0/0/0
[120/1] via 209.165.200.234, 00:00:08, Serial0/0/1
209.165.200.0/30 is subnetted, 2 subnets
