Monitoring and Analyzing Switch Operation

Traffic Mirroring

Configure a Mirroring Policy to Select Inbound Traffic (Page B-66)

class < ipv4 ipv6 > < classname >

[no] [seq-number] < match ignore > < ip-protocol > < source-address >

<destination-address > [ precedence precedence-value ] [ tos tos-value ] [ ip-dscpcodepoint ] [ vlan vlan-id ]

policy mirror < policy-name>

[no] [seq-number] class < ipv4 ipv6 > < classname > action mirror <session> [ action mirror < session > ... ]

[no] default-class action mirror < session >

[no] < interface < port/trunk > vlan < vid-#>> service-policy <mirror-policy-name>in

 

 

In the policy mirror command, the mirror < session > parameter accepts a

 

 

number (1 to 4) or name, if the specified mirroring session has already been

 

 

configured with the name < name-str> option in the mirror command.

 

The no < interface vlan > service-policy in command removes the mirroring

 

configuration from a port, VLAN, trunk, or mesh interface for a specified

 

session, but leaves the session available for other assignments.

 

Configure the MAC-based Criteria to Select Traffic (Page B-63)

 

 

[no] monitor mac < mac-addr> < src dst both > mirror < session >

 

 

 

 

 

 

N o t e

 

If you have already configured session 1 with a destination, you can enter the

 

 

vlan < vid > monitor or interface < port > monitor command without traffic-

 

selection criteria and session identifier to:

 

 

Overwrite the existing session 1 configuration.

 

 

Automatically configure mirroring in session 1 for inbound and outbound

 

 

traffic on specified VLAN or port interfaces with the preconfigured desti­

 

 

nation.

 

 

 

1. Determine the Mirroring Session and Destination

For a Local Mirroring Session. Determine the port number for the exit port (such as A5, B10, etc.), then go to “4. Configure the Monitored Traffic in a Mirror Session” on page B-55.

For a Remote Mirroring Session. Determine the following information and then go to step 2, below.

The IP address of the VLAN or subnet on which the exit port exists on the destination switch

The port number of the remote exit port on the remote destination switch (In a remote mirroring endpoint, the IP address of the exit port and the remote destination switch can belong to different VLANs.)

B-49