Cannot ping or telnet neighbor switch

[Boian Soloviov]

Hi all, I am gobsmacked:

configured two Catalyst 2960G switches connected via trunk ports. Configured on both of them int vlan1 with IP address from the same subnet 192.168.52.0/24. Configured all other ports on both switches with

sw mo acc

sw acc vlan 1

no shut

When I physically ethernet-connect to switch #1 I can ping and telnet it but not #2. And vice versa when I plug the laptop cable to switch #2 i can perfectly well ping and telnet it but NOT #1. From the IOS console I can sh cdp neighbors, it shows me the other devices properties and port number but even from there the ping does not succeed.

Am I going nuts or what?

Thanks a million!

[Jon Marshall]

Can you post the output of -

1) sh int trunk

2) "sh ip int br | include Vlan"

3) also running config of each switch

Jon

[Boian Soloviov]

Thanks for the fast reply, Jon, will update this info tomorrow.

Best

BS

[Boian Soloviov]

Hi Jon, community,

to make long story short: it was not a switching problem. E.g. both trunk ports had the vlan 1 as native, both interfaces were up, etc...

What really caused the problem was a remnant from the past, where all the ports of one of the switches were "restricted" to single client with

switchport port-security

The latter was confidgured for the trunk port as well, leading to the default setting of maximum 1. If it wasn't for the Cisco Network Assistant that I fired up and saw over 1000 blocked connections it would have been even longer to define this single line of misconfiguration.

Still thanks a million for the help offered at hard times!

Sincerely

BS

[Jon Marshall]

BS

No problem. glad you worked it out and thanks for letting us know.

And at least now you know you aren't going nuts

Jon