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Posted by Trendkill on August 6, 2008, 2:13 pm
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>
> > I can't get this to work and now wonder if it's even possible.
> > If possible how do I config intermediate 2621 router to handle rspan
> > traffic.
> > I have RSPAN working on LAN.
> > Thanks for any hints, etc.
>
> I don't think this is possible. =A0The way a RSPAN works (from my old
> experience), is that a switch will copy each frame/packet into a
> special RSPAN VLAN. =A0Then any node in any switch on that vlan, can
> 'sniff' the traffic. =A0Of course we have to then understand that the
> RSPAN vlan would need to available in all switches (i.e. trunked).
> Unless you are doing l2 over the WAN, I don't see how this would
> work. =A0Not to mention the major concerns I have about copying all LAN
> traffic to a particular node of VLAN over a limited bandwidth WAN.
> Not to say you don't know what you are doing (I'm sure you are aware
> of your network limitations), but I would be very careful in this
> circumstance.
I think you are looking for Encapsulated Remote Span (ERSPAN). ERSPAN
will work over a routed network, but not sure your gear will support
you. Here are a few links:
http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SXF/nativ=
e/configuration/guide/span.html#wp1059482
http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SXF/nativ=
e/configuration/guide/span.html#wp1063324'
These are for a 6500 series, so you'll need to check your switch code
and your WAN. Very possible, but if I had to guess on a 2621, you are
probably out of luck.
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