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New Member

show ip sockets output

When I run the show ip sockets from the CLI on a Cat 3500XL switch, I get some unexpected results.

On 3 switches that are interconnected, there is a client device ( that shows a connection to port 33521. These entries show up everyday when I perform the query. Does anyone know what might be going on here - what I can check on the client pc (I plan on running a netstat)

nycs-s200101#show ip sockets

Proto Remote Port Local Port In Out Stat TTY OutputIF

17 123 123 0 0 1 0

17 33521 161 0 0 1 0

17 514 51153 0 0 0 0


Re: show ip sockets output

161 indicates that this host is accessing your switch on SNMP services.

could be a monitoring device? cisco works?


if it does, Id appreciate if you rate this post.


New Member

Re: show ip sockets output


Thank you for this response. The ip address in question is actually a client machine. This device should not be monitoring our switches. Do you know of a way to disconnect this from the switch side?

Cisco Employee

Re: show ip sockets output

If its port 161 then its polling the switch via the read or read-write community strings. You could either change the comm strings (may not be feasible) or put an access-list on the community strings preventing that client from polling the switch.

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