Common Errors

Consider a monitor session with source as Ex 0/1 and destinations as Ex 0/2 and Ex 0/3 with vlan 100.

SEFOS-1# show monitor all
Session     : 1
-------
Source Ports 
Rx              :  None
Tx              :  None
Both            : Ex0/1
Destination Ports : Ex0/2 Ex0/3
VLAN              : 100

The following are the common errors while configuring monitor sessions.

• Configuring a port as a mirror destination.

  SEFOS-1# configure terminal
  SEFOS-1(config)# monitor session 1 source interface extreme-ethernet 0/2
  % Port already configured as Mirror Destination
  SEFOS-1 (config)# end

• Configuring a port as a mirror source.

  SEFOS-1(config)# monitor session 1 source interface extreme-ethernet 0/3
  % Port already configured as Mirror Source
  SEFOS-1 (config)# end

• Configuring a destination port again for the same session.

  SEFOS-1(config)# monitor session 1 destination interface extreme-ethernet 0/5
  % CLI Command Failed
  % Maximum primary destination mirror ports exceeded
  SEFOS-1 (config)# end

• Configuring a mirror destination as a destination or source of the other session.

  SEFOS-1(config)# monitor session 2 destination interface extreme-ethernet 0/1 secondary interface extreme-ethernet 0/2 vlan 1223
  %Command Failed: Invalid use secondary interfaces
  SEFOS-1 (config)# end

• Configuring a mirror with the primary VLAN.

  vlan ID 200 Member Ports Ex0/15, Ex0/16 Untagged Ports None Forbidden Ports None Reflective-Relay Disabled Name Status Other

  SEFOS-1(config)# monitor session 1 destination interface extreme-ethernet 0/1 secondary interface extreme-ethernet 0/10 vlan 200
  %Cannot configure Mirror with Principal VLAN
  SEFOS-1(config)# monitor session 1 destination interface extreme-ethernet 0/1 secondary interface extreme-ethernet 0/10 vlan 500
  SEFOS-1 (config)# end

• Configuring a VLAN being used in the secondary mirror.

  SEFOS-1# show monitor all
  Session     : 1
  ------- 
  Destination Ports : Ex0/1 Ex0/10
  VLAN              : 500
  SEFOS-1# configure terminal
  SEFOS-1(config)# vlan 500
  SEFOS-1(config-vlan)# ports add extreme-ethernet 0/9
  %Cannot configure Vlan 500:Currently being used for Mirroring
  SEFOS-1(config-vlan)# end