Telnet from 6513 on port 2821 fails

[jpugliese]

Hi,

I am having issues with 'telnet' on port 2821 to a range of servers connecting through vlan interface from my core switch 6513 running s72033_rp-ADVIPSERVICESK9_WAN-VM) version 12.2(33)SXH7, RELEASE SOFTWARE (fc3). The telnet on port 1556 and 13724 is ok.

A quick help would be much appreciated. thanks.

[nkarpysh]

Can you please share the digram to see the trafifc flow. Basic things to check first are:

- confirm if server listening on that port

- check L2/L3 path for any ACL/VACL blocking that port or blocking return traffic from that port

- trying this telnet from another L3 hop f present) which is closer to server (e.g. on access switch if that is L2/L3 create svi in same VLAN and try to do telnet from it)

Nik