Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

spwr0 not sniffing

I have a remote sensor (4230) that just slowly stopped sniffing traffic. Right now all it sees are ARP (netbios) requests. This sensor is plugged into a brand new hub, with new cabling.

According to the log the sensors sniffing interface will come up for 1 minute then go down and stay down for 40 minutes. FYI this sensor has been replaced once (same problem). Are we looking at something environmental? Or a known bug? This sensor is configures the same as many others that we manage, yet it is the only one exhibiting this problem.

Any help......Thanks

5 REPLIES
New Member

Re: spwr0 not sniffing

BTW .... Current Sig version is 3.0(5)S23

Cisco Employee

Re: spwr0 not sniffing

a few questions: If you unplug the cable then plug it back in, does the traffic start up again? Have you tried snooping the traffic to see if there is anything unusual right before it stops? Try doing a snoop with netrangr stopped. Does the traffic still quit after 1 minute. try connecting the sniffing interface to the same place as the command/control. Do the snoop. does traffic die there also??

New Member

Re: spwr0 not sniffing

With both cables plugged into a hub, that we know has 100k of traffic passing through, sniffing the spwr0 interface only shows us management traffic.

When the cables are connected correctly (one to managed router, sniffing to hub) we only see broadcast traffic (ARP whois).

This sensor was working just fine until over the course of 1 to 2 weeks it would sniff less and less traffic and then the sniffing just stopped.

Any help...we dont want to have to replace equipment

Cisco Employee

Re: spwr0 not sniffing

What model of hub are you using? it is sure acting like a switch....

New Member

Re: spwr0 not sniffing

We are using a 1538M hub.

104
Views
0
Helpful
5
Replies