SCSIraidGURU’s World

This is part of the CCNP Routing exam. I created 4 OSPF areas that I have placed various subnets into that I will be showing how manual route summarization using the area x range statements work. You cannot use it on area 0. Area 0 must remain intact with the actual routes for OSPF to function. However, areas 1,2, and 3 will get manual route summarization done.

These are the changes to ROUTER OSPF 1

I have added all the SH IP INT BR information for each router. YOu will see each of the subinterfaces with all the contigious subnets. I have some with 2, 4 and up to 16.

SH IP INT BR for each router

The most interesting one is iosv-3 in area 3. It has two contiguous subnets to These two /24s will become a /23

iosv-3#sh ip int br Interface IP-Address OK? Method Status Protocol GigabitEthernet0/0 YES NVRAM up up GigabitEthernet0/1 unassigned YES unset up up GigabitEthernet0/1.16 YES NVRAM up up GigabitEthernet0/1.17 YES NVRAM up up GigabitEthernet0/1.161 YES NVRAM up up GigabitEthernet0/1.162 YES NVRAM up up GigabitEthernet0/1.163 YES NVRAM up up GigabitEthernet0/1.164 YES NVRAM up up GigabitEthernet0/1.165 YES NVRAM up up GigabitEthernet0/1.166 YES NVRAM up up GigabitEthernet0/1.167 YES NVRAM up up GigabitEthernet0/1.171 YES NVRAM up up GigabitEthernet0/1.172 YES NVRAM up up GigabitEthernet0/1.173 YES NVRAM up up GigabitEthernet0/1.174 YES NVRAM up up GigabitEthernet0/1.175 YES NVRAM up up GigabitEthernet0/1.176 YES NVRAM up up GigabitEthernet0/1.177 YES NVRAM up up Loopback0 unassigned YES unset up up iosv-3#

Starting out with no OSPF manual summarization in iosv-1 router ospf 1

Starting out with OSPF manual summary in iosv-1 router ospf 1