Solved: Cisco 3750 switch routing problem

Marco Bisignano · ‎05-10-2016

Hi all, I have a Cisco switch 3750 with this configuration: on Fast ethernet 0 I have configured this network:

interface FastEthernet0
ip address 10.41.105.198 255.255.255.192

this interface is connected to a remote site (remote site address is 10.41.105.1)

then I have configured:

interface GigabitEthernet1/0/1
switchport access vlan 101

and

interface Vlan101
ip address 45.100.11.1 255.255.255.0

now I have a PC connected to GigabitEthernet1/0/1 and this is the configuration:

IP: 45.100.11.10

Subnet: 255.255.255.0

GW: 45.100.11.1

Now the situation is:

ping from SWITCH 3750 to remote site 10.41.105.1 is OK

ping from PC to 45.100.11.1 (GW) is OK

ping from PC to 10.41.105.198 (FastEthernet0) is OK

ping from PC to remote site 10.41.105.1 is NOT OK (Reply timeout)

why I'm not able to ping remote site on 10.41.105.1 ? I have already tried to set:

ip routing

...

ip route 10.41.105.1 255.255.255.255 FastEthernet0

ip route 45.100.11.0 255.255.255.0 vlan 101

but is still not working and the answer is the same (Reply timeout); please help me.

Thank you.

Carlos Villagran · ‎05-10-2016

Hi!

Then you should not be able to ping from remote site to 45.100.11.1.

This could be caused by a routing problem in the remote site with no route to 45.100.11.1/24.

Hope it helps, best regards!

JC

View solution in original post

Carlos Villagran · ‎05-10-2016

Hi!

Can you ping to 10.41.105.1 from the switch?

Regards!]

JC

Marco Bisignano · ‎05-10-2016

Yes ping from SWITCH 3750 console to remote site 10.41.105.1 is OK

Reza Sharifi · ‎05-10-2016

Hi,

ip route 10.41.105.1 255.255.255.255 FastEthernet0

try this:

ip route 10.41.105.192 255.255.255.192 FastEthernet0

and test again.

HTH

Marco Bisignano · ‎05-10-2016

No sorry, absolutely not working

Carlos Villagran · ‎05-10-2016

Hi!

Can you ping 10.41.105.198 from PC?

Regards!

JC

Marco Bisignano · ‎05-10-2016

Yes, as I reported on my post those are the results: