Configuring a Monitor Port for ERSPAN

An ERSPAN monitor port is the port on which traffic is captured and sent to a remote destination over a Layer 3 network.

Before you configure the monitor port, you must configure an ERSPAN profile.

  1. Enter global configuration mode. 
    device# configure terminal
  2. Enter interface configuration mode. 
    device(config)# interface ethernet 1/2/3
  3. Configure the mirror port for ERSPAN. 
    device(config-if-e1000-1/2/3)# monitor profile 1 both
  4. Verify the configuration. 
    device(config-if-e1000-1/2/3)# show erspan profile 1
Profile 1
Type             ERSPAN
Mirror destination Reachable.
Destination IP   10.1.1.100
Destination MAC  cc4e.0000.0001
Source IP        10.1.1.1
Source MAC       cc4e.0000.0000
Outgoing port    1/2/3
Outgoing VLAN    101
Outgoing VE      101
Ports monitored:
  Input monitoring      : (U1/M1)   1 
  Output monitoring     : (U1/M1)   1 
HW destination id for each device:
stack_id/device:dest_id   1/1:3c000000
Port mirroring is now enabled between the monitor port and the destination that was specified in the ERSPAN profile.

ERSPAN Monitor Port Configuration Example 

device# configure terminal 
device(config)# interface ethernet 1/2/3
device(config-if-e1000-1/2/3)# monitor profile 1 both
device(config-if-e1000-1/2/3)# show erspan profile 1
Parent topic: Encapsulated Remote Switched Port Analyzer (ERSPAN)