Can also a SPAN port passes normal traffic while it monitors other ports?

[turbo_engine26]

Hello All,

I would like to know if a SPAN (mirroring) port can also passes users' traffic. I know that its being busy monitoring those traffic but can it also work as normal access port. Is there a feature in the new IOS to configure a port to act both access and monitoring port in the same time?

Appreciate your help. :)

[Aaron Harrison]

Hi

Yes, you can use the 'ingress' keyword on the monitor destination command.

Regards

Aaron

[roor]

Hi,

SPAN ports that monitor traffic cannot forward packets. There is no feature that enables the span destination port to behave as a normal access port too. Please see the link below for more details.

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12-2_52_se/configuration/guide/3750scg/swspan.html#wp1036749

HTH,

Roopa

[turbo_engine26]

Hi,

Thanks but what the ingress keyword that Aaron talked about does?

Thx

[roor]

The "ingress" keyword in the monitor session is to monitor the incoming packets on the interface and to forward it to the destination interface.

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12-2_52_se/configuration/guide/3750scg/swspan.html#wp1260596

HTH,

Roopa

[Aaron Harrison]

Hi Roopa

It's not.

the 'rx' 'tx' and 'both' keywords specify which direction of traffic is monitored.

'ingress' - well.. read the manual.

Mr Turbo_Engine26 - if in doubt, test it or google what is suggested.

Aaron