11-04-2009 02:41 AM - edited 03-06-2019 08:26 AM
We are attempting to use VACLs to forward traffic for inspection to a NIDS solution. We would like to preserve the VLAN tags as the NIDS uses this as part of its policy. The question is does VACL support forwarding VLAN tags as well?
Kind regards
11-04-2009 12:07 PM
The VACL capture will "preserve" the 802.1q tags, this means if the source port is a trunk, if you configure the capture port like this:
Int gi5/1
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan x,y,z
switchport mode trunk
switchport nonegotiate
switchport capture
switchport capture allowed vlan x,y,z
The switchport nonegotiate command is required as I remember some cases in which this wasn't working unless you add this command
11-05-2009 01:18 AM
Thanks for your quick response! We'll get testing with this and let you know our results
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