Can't ping switch but can ping out from it. 1

[fdalmoro]

I have a setup that looks somewhat like this:

Switch4<-trunk->CoreRouter1<-trunk->Switch2<-trunk->Switch3

- All on VLAN10 (trunks are Tagged for V10 and switch ports are untagged V10).
- Default VLAN is not used.
- ON V10-> CoreRouter - 10.1.10.1 / SW4 is .4 / SW3 is .3 / SW 2 is .2
- Default gateway on all switches is set to 10.1.10.1

I can ping to and from SW4 and SW2. I can't ping from SW3 and I can't ping to it. If I connect PC's in to SW3 they can ping and function fine but I can't ping them from anything connecting to SW4 or SW2.

If it helps SW2,4 are HP, SW3 is Cisco.

Let me know if I missed anything that could help.

Fernando

 

[burtsbees]

What trunking protocol do you have set up? What model of switch is the Cisco? If it is a 2950, more than likely it uses ISL as the trunking protocol, and not 802.1Q---they will not jive right---ISL is Cisco proprietary, and thank goodness they did away with it.

Burt

 

[fdalmoro]

It's a C3500 XL ...

This is in the trunk config:

switchport trunk encapsulation dot1q

I heard about that problem from a Cisco guy and I think I have the right protocol because when the PC's are connected it works fine.

BTW I also tried setting the Default Gateway on SW3 to the next switch up (SW2) IP. That didn't help.

Fernando

 

[fdalmoro]

OK, I talked to a co-worker and he looked at the config. The problem is that the VLAN with the IP that needs to be active needs to be in a 'no shutdown' state. VLAN10 was shutdown on my switch. I shutdown VLAN1 and ran 'no shutdown' on VLAN10 and everything started working fine.

Thanks for the help anyway.

Fernando

Fernando