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Unable to Ping other interfaces when route appears to be there

All our devices are on vlan 1 in one building. However, we are trying to implemenet a new link. All devices
are using the 192.168.1.0 Network. However we are trying to add 192.168.21.0

On our 2950 switch we have 3 routers attached

Users have are given 2 default gateways via DHCP-One Gateway From Router A and the other from Router B

Router A-192.168.1.252
Router B-192.168.1.245

Router C will be the new subnet and Gateway -192.168.21.236

From Router B I can ping the 192.168.21.236 interface.

RouterB#sh ip route 192.168.21.236
Routing entry for 192.168.0.0/16, supernet
Known via "static", distance 1, metric 0

But from router A I cant
router A>sh ip route 192.168.21.236
% Network not in table

From my desktop on the 192.168.1.X subnet, I can ping the 192.168.21.236 interface. Perhaps I using Router B gateway when I do this??

However, when I switch over to the 192.168.21.X subnet, and use the .21.236 on router C-as my default gateway I CAN'T ping Router A but can Ping router B

BUT I have a route to the entire 192.168.1.0 network...via connection to router B. This would include a route to router A

Router A-192.168.1.252
Router B-192.168.1.245

Router C #sh ip route 192.168.1.252
Routing entry for 192.168.1.0/24
Known via "connected", distance 0, metric 0 (connected, via interface)
Redistributing via ospf 100

RouterC #ping 192.168.1.252
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.252, timeout is 2 seconds:
...
Success rate is 0 percent (0/3)
RouterC#ping 192.168.1.245

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.245, timeout is 2 seconds:
!!!!!

However, only when I log into router B-can I ping router A

I'm stumped

I see no access lists applied to any interface on Router A that would deny ICMP

cedarghost

Did you add static routes on the old routers to point to the new networks (one for your router to router connection and one for the LAN on the new router)? The directly connected router will only need a static route to the LAN. The other router will need a route to both.

njcomp3

ASKER

No -no new static routes were added-since the routers can ping other IP interfaces on each other.and
since the new router as a route to the 1.0 subnet, it doesnt make sense that I cant ping
an active interface on a router that is assigned the 1.0 address range..does it?

also..can I add static routes even though the destination is not directlty connected, but connected
via 2950 switch...router 1 fe2/0.........and router 2 fe 3/0 on the switch?

njcomp3

ASKER

also....router C has a secondary IP interface of 1.236 which I can ping from router A
but the primary interface of 21.236 I can not ping from router A

cedarghost

Can you ping the .252 address from the router it is assigned on? Also, I see that you are using OSPF. Can you post your entire routing table via "show ip route" and also post "show router ospf 100"

cedarghost

You are right by the way, you don't need static routes if you are using OSPF.

njcomp3

ASKER

The .252 address is the HSRP interface of router A. From router C I can not ping any interfaces on Router A. From router A I can only ping the secondary IP interface on router C.

This is form router C

router ospf 100
router-id 192.168.21.236
log-adjacency-changes
redistribute connected subnets
network 192.168.1.0 0.0.0.255 area 1
network 192.168.100.0 0.0.0.255 area 1
network 192.168.118.0 0.0.0.255 area 1
network 192.168.255.0 0.0.0.255 area 1

cedarghost

Just a question, why are you using Area 1? Do you have an Area 0?

njcomp3

ASKER

no sure..i didnt design this network...soooo

I did sh ip ospf border-routers and everything was in Area 1

ASKER CERTIFIED SOLUTION

njcomp3

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