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Implementing SPAN and RSPAN on cisco Catalyst 4506

On configuing SPAN on 4506 (by commands mentioned below) the destinatin m/c looses Network Connectivity, Websense Network Agent is at the destination port.Pl. guide .....

monitor session 2 source interface Fa2/3

monitor session 2 destination interface Gi6/15

m/c (network agent) on port gi6/15 looses Network Connectivity (we can't ping the m/c) once above commands r exwcuted. Pl. suggest way to implement SPAN & RSPAN on cat. 4506 (Version 12.1(19)EW1)

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4 REPLIES

Re: Implementing SPAN and RSPAN on cisco Catalyst 4506

Hi,

the Ingress option might help you.

See http://www.cisco.com/univercd/cc/td/doc/product/lan/cat4000/12_1_19/config/span.htm#62666

for details.

Regards,

Milan

Anonymous
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Re: Implementing SPAN and RSPAN on cisco Catalyst 4506

Already tried the ingress option

ie. monitor session 2 destination int gig6/15 ingress vlan 101

* where the destn. m/c is in VLAN 101 (port 6/15)

Still as we press ENTER after the above cmd line the m/c gets out of network.

Any other way pl. specify.....This one is a real teaser.

New Member

Re: Implementing SPAN and RSPAN on cisco Catalyst 4506

What I normally do is have two network interfaces for any device that needs to monitor traffic. One port can be listening while you manage the other port via another network connection.

One thing you can do is to check if your m/c (after it drops) can it still see the traffic that you SPAN'ed? (i.e. check from the console of the machine) Do you think the m/c is getting close to 100Mbps that it can't handle both normal and promiscious mode operations? Hope this helps.

Re: Implementing SPAN and RSPAN on cisco Catalyst 4506

Hi,

have you considered the sentence

"If it is necessary to send traffic to a host connected to the SPAN destination port with ingress enabled, a static host entry may be configured." from the article?

I understand you need to set a static MAC entry on the destination port.

HTH,

Milan

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