Configure 802.1BR Tag-Stripping

Follow this procedure to strip 802.1BR tags to support the encapsulation type expected by your traffic-analysis tools.

1. Enter the Config mode.
   The command line changes to configuration mode.

   

   device(config)# 

2. Configure an ACL of type IPv4, IPv6, or MAC and any actions.
   

   device(config)# ip access-list acl5-ipv4
   device(config-ip-acl)# seq 10 permit ip any any count

   The specified ACL and configured actions are bound to a listener policy.
3. Create the listener policy, including any action subcommands for the policy.
   

   Note

   A listener policy supports only one of each of each ACL type: IPv4, IPv6, MAC.
   

   device(config)# listener-policy lp-2 24
   device(config-listener-policy)# match ip access-list acl5-ipv4
   device(config-listener-policy)# strip br-tag
   device(config-listener-policy)# description "Strips 802.1BR tags"

4. Configure an egress policy, and bind the listener policy, specifying any additional egress actions.
   

   Note

   An egress can be associated with only one listener policy.
   

   device(config)# egress e2
   device(config-egress)# set listener-policy lp-2
   device(config-egress)# description DirectTool
   device(config-egress)# set encap encap-1 
   device(config-egress)# precedence 1 interface ethernet 1/14

5. Configure an egress group and associate it with the egress policy.
   

   device(config)# egress-group eg_1 
   device(config-egress-group)# description e-group_1
   device(config-egress-group)# set egress e2

6. Configure the route map and set any other parameters, such as forwarding actions, match ip access list, and the egress-group.
   

   Note

   A route-map policy supports only one match-ACL per layer.
   

   device(config)# route-map R1 10 
   device(config-route-map)# match ip access-list acl5-ipv4
   device(config-route-map)# set egress-group eg_1
   device(config-route-map)# forward-action permit

7. Configure an ingress group and associate a route map.
   

   Note

   An ingress group can be associated with only one route map.
   

   device(config)# ingress-group TAP_TRAFFIC
   device(config-ingress-group)# set route-map R1

8. Configure the interface port and channel for ingress traffic.
   

   Note

   In the following example, traffic is coming in on slot/port-number 2/3.

   

   interface ethernet 2/3
   description From_TAP
   set ingress-group TAP_TRAFFIC
   no shutdown

9. Configure the interface port and channel for egress traffic.
   

   Note

   In the following example, traffic is leaving on slot/port-number 2/14.

   

   interface ethernet 2/14
   speed 100000
   description To_Tool
   no shutdown