Static Routing

[gozarrojas]

Good evening, a query, in the picture you can see that the R2 has a static route with 10.0.0.0/8. Therefore, when a machine in the network 10.4.10.0/24 or 10.4.11.0/24 is pinging R2, it succeeds, but because this happens if they belong to different networks.

It does not have R2 configured:

• 0.0.0.0 0.0.0.0 10.4.1.2
• 10.4.10.0 255.255.255.0 10.4.1.2
• 10.4.11.0 255.255.255.0 10.4.1.2

R1: ip route 0.0.0.0 0.0.0.0 Serial0/0/1

[Julio E. Moisa]

Hi

Could you please provide more details about the question? basically if you are using ping to test the communication from point A to B, you must take in consideration the icmp packet is reciprocal, so the source must to know reach the destination and the destination the returning path to the source. 

If you have a default static route on R2 you could remove the following static route entries, but usually the default route is used to reach unknow destination or every destination

• 10.4.10.0 255.255.255.0 10.4.1.2
• 10.4.11.0 255.255.255.0 10.4.1.2

Hope it is useful

:-)

[gozarrojas]

Thank you for your prompt response, and I regret the delay. My question was because the ping arrives, if the R2 does not have a default route, nor the subnets, but it does have a static route for R1 10.4.1.0. Therefore, you should not know about the existence of the other networks (10.4.11.0 - 10.4.10.0). 

[paul driver]

Hello

R2 has a static route for 10.0.0.0/8 which incorporate all the 10.0.0.0 subnet ranges ( inc 10.4.11.0 - 10.4.10.0)

R1 has a default route pointing towards R2 stating any traffic it is not aware of forward towards R2

So this is the reason why R2 can successfully ping the rts behind rtr1 on networks 10.4.11.0 - 10.4.10.0