Applying Layer 2 Port Mirroring to Traffic Forwarded or Flooded to a VLAN
You can apply a Layer 2 port-mirroring firewall filter to traffic being forwarded or flooded
to a VLAN. Only packets of the specified family type and forwarded or flooded to that
VLAN are mirrored.
Before you begin, complete the following task:
•
Define a Layer 2 port-mirroring firewall filter to be applied to the traffic being forwarded
to a VLAN or flooded to a VLAN. For details, see Defining a Layer 2 Port-Mirroring Firewall
Filter.
NOTE: This configuration task shows two Layer_2 port-mirroring firewall
filters: one filter applied to the VLAN forwarding table ingress traffic, and
one filter applied to the VLAN flood table ingress traffic.
To apply a Layer 2 port-mirroring firewall filter to the forwarding table or flood table of
a VLAN:
1. Enable configuration of the VLAN bridge-domain-name to which you want to apply a
Layer 2 port-mirroring firewall filter for forwarded or flooded traffic:
•
For a VLAN:
[edit]
user@host# edit bridge-domains bridge-domain-name
•
For a VLAN under a routing instance:
[edit]
user@host# edit routing-instances routing-instance-name bridge-domains
bridge-domain-name
user@host# set instance-type virtual-switch
For more detailed configuration information, see Configuring a VPLS Routing Instance.
2.
Configure the VLAN:
[edit]
user@host# set domain-type bridge
user@host# set interface interface-name
user@host# set routing-interface routing-interface-name
For more detailed configuration information, see Configuring a Bridge Domain and
Configuring VLAN Identifiers for Bridge Domains and VPLS Routing Instances.
3.
Enable configuration of traffic forwarding on the VLAN:
[edit ... bridge-domains bridge-domain-name]
user@host# edit forwarding-options
Copyright © 2016, Juniper Networks, Inc.52
Port Mirroring Feature Guide for EX9200 Switches
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