[c-nsp] ERSPAN using VACLs?

[Tim Stevenson]

Theoretically the capability exists (ie, hw supports it), but it is 
not implemented. Believe me, I have pushed for this to get into a 
release, but as it stands it doesn't look likely any time soon.

If you have RSPAN traffic coming from another switch, you can VACL 
filter it in the RSPAN VLAN on the ERSPAN source switch & then use 
the RSPAN VLAN as your ERSPAN source; but if an RSPAN *source* 
session exists on the switch you won't be able to ERSPAN that RSPAN VLAN.

Confusing I expect: IOW, you can't use an RSPAN VLAN as an ERSPAN 
source if there is a corresponding RSPAN source session on the same 
switch; but you can use an RSPAN VLAN as an ERSPAN source if the 
RSPAN VLAN simply exists & traffic is entering the switch on that 
RSPAN VLAN from elsewhere.

HTH,
Tim

At 04:53 PM 8/2/2007 -0700, Christian MacNevin observed:
>Hello!
>Is it possible in later versions of SXF to use ACLs in any way to filter the
>traffic going into an ERSPAN tunnel?
>I know it's possible to do this with RSPAN, but I like ip more than I like
>802.1Q :)
>Thanks
>Christian
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Tim Stevenson, tstevens at cisco.com
Routing & Switching CCIE #5561
Technical Marketing Engineer, Data Center BU
Cisco Systems, http://www.cisco.com
IP Phone: 408-526-6759
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