Controller Based WLANs

Q:

Does Clear Counters command affect the VRRP State?

Yes, the clear counters command affects the VRRP state. When clear counters command is executed we are clearing all counters, so the state machine starts afresh. These commands are maintenance mode commands and should not be performed without shutting down the VRRP.

Example:

Before the "clear counters command":

On STANDBY:

(Aruba3200-Standby) #show clock

Thu Jan 28 02:06:54 PST 2016

(Aruba3200-Standby) #show vrrp stats  all

Virtual Router 196:

   Admin State UP, VR State BACKUP

   Advertisements:
   Sent:                                0   Received:                      3129
   Zero priority sent:                  0   Zero priority received:           0
   Lower IP address received         3129   Lower Priority received           0
   Tracking priority overflow:          0
   Advertisements received errors:
      Interval mismatch                 0   Invalid TTL                       0
      Invalid packet type               0   Authentication failure            0
      Invalid auth type                 0   Mismatch auth type                0
      Invalid VRRP IP address           0   Invalid packet length             0
   VRRP Up timestamp:                       Wed Jan 27 22:46:42 2016
   Master Up timestamp:                     N/A, not MASTER
   Last advertisement sent timestamp:       Thu Jan 28 00:51:30 2016
   Last advertisement received timestamp:   Thu Jan 28 02:07:22 2016
   Current time:                            Thu Jan 28 02:07:23 2016
   Number times became VRRP Master:         0

After the "clear counters command":

(Aruba3200-Standby) #show clock

Thu Jan 28 02:08:04 PST 2016

(Aruba3200-Standby) #clear counters vrrp 196
(Aruba3200-Standby) #show vrrp stats  all

Virtual Router 196:

   Admin State UP, VR State BACKUP

   Advertisements:
   Sent:                                2   Received:                         6
   Zero priority sent:                  0   Zero priority received:           0
   Lower IP address received            6   Lower Priority received           0
   Tracking priority overflow:          0
   Advertisements received errors:
      Interval mismatch                 0   Invalid TTL                       0
      Invalid packet type               0   Authentication failure            0
      Invalid auth type                 0   Mismatch auth type                0
      Invalid VRRP IP address           0   Invalid packet length             0
   VRRP Up timestamp:                       Wed Jan 27 22:46:42 2016
   Master Up timestamp:                     N/A, not MASTER
   Last advertisement sent timestamp:       Thu Jan 28 02:08:04 PST 2016 =============> The time when the command was executed.
   Last advertisement received timestamp:   Thu Jan 28 02:08:08 2016
   Current time:                            Thu Jan 28 02:08:09 2016
   Number times became VRRP Master:         1

Under System Logs:

(Aruba3200-Standby) #show log system 30

Jan 28 02:08:05 :313331:  <WARN> |fpapps|  VRRP: vrid "196" - Missed 3 Hello Advertisements from VRRP Master 10.17.169.151
Jan 28 02:08:05 :313328:  <WARN> |fpapps|  vrrp: vrid "196" - VRRP state transitioned from BACKUP to MASTER
Jan 28 02:08:05 :399838:  <WARN> |fpapps|   publish_license_vrrp_state : VRRP State change vrrid : 196, cur State : MASTER, licensevrid : 0 , mvrid : 196
Jan 28 02:08:05 :399838:  <WARN> |fpapps|   Sending to licensemgr  vrrid : 196, cur State : MASTER