mirror-filter source vlan

Configures one or more VLANs to be filtered from Switched Port Analyzer (SPAN) or Remote Switched Port Analyzer (RSPAN) mirrored traffic.
Syntax
mirror-filter source vlan {vlan-id }
no mirror-filter source vlan {vlan-id }
Command Default

By default, VLAN-based filtering is disabled.

Parameters
vlan-id
Specifies the VLAN for which traffic is to be filtered. More than one VLAN ID, a VLAN range, or both can be entered on the same command line.
Modes

The no form of the command removes the mirror-filter for forwarding specified VLANs.

Usage Guidelines

A maximum of 72 VLANs can be mirror-filtered, contingent on TCAM availability.

When you configure VLAN mirror filtering, keep in mind the potential for bandwidth congestion on destination uplinks. If the RSPAN destination uplink is the same as the forwarding path, the number of mirror traffic sources configured should be appropriate to the bandwidth available for forwarding traffic.

Examples

The following example configures a single VLAN for forwarding.

device# configure terminal
device(config)# mirror-filter source vlan 100

The following example configures two single VLANs for forwarding.

device# configure terminal
device(config)# mirror-filter source vlan 3000 3500

The following example configures RSPAN-based port mirroring on ports 1/1/1 and 1/1/2 and configures LAG 1 as the destination.

device# configure terminal
device(config)# vlan 3000 by port
device(config-vlan-3000)# untagged ethernet 1/1/1
device(config-vlan-3000)# tagged ethernet 1/1/2
. . .
device(config-vlan-3000)# exit
device(config)# vlan 3500 by port
device(config-vlan-3500)# tagged ethernet 1/1/1 to 1/1/2
. . .
device(config-vlan-3500)# exit
device(config)# rspan-vlan 4000
device(config-rspan-vlan-4000)# tagged lag 1
device(config-rspan-vlan-4000)# rspan destination lag 1
device(config-rspan-vlan-4000)# rspan source monitor-in ethernet 1/1/1 to 1/1/2
device(config-rspan-vlan-4000)# end
device# show vlan brief ethernet 1/1/1
Port 1/1/1 is a member of 2 VLANs
VLANs 3000 3500
Untagged VLAN :
Tagged VLANs : 3000 3500

In the example, the mirrored traffic from ports 1/1/1 and 1/1/2 is sent through LAG 1. Port 1/1/1 is an untagged member of VLAN 3000 and a tagged member of VLAN 3500. Traffic for both these VLANs inbound to 1/1/1 is mirrored and sent through the destination port, LAG 1. Because VLAN-based filtering is enabled for VLAN 3000, mirrored traffic from that VLAN is filtered, and the RSPAN destination, LAG 1, carries on VLAN 3500 traffic arriving on port 1/1/1.

History
Release version Command history
08.0.90f This command was introduced.
Parent topic: Commands M