[j-nsp] Immediate aging in EX-3200

[Emil Katzarski]

Hello,

I have a switch EX3200-48T with quite simple L2 config. Once in a
while I can see some MAC addresses learned on the correct interface
and VLAN, but then (less than a second later) the MAC is deleted.
I can also see  the "Immediate aging" counter increasing.

Example:

user at switch> show ethernet-switching statistics aging
Total age messages received: 4610446
  Immediate aging: 3473, MAC address seen: 4336261, MAC address not seen: 270712
Error age messages: 42612
  Invalid VLAN: 1030, No such entry: 41582, Static entry: 0

user at switch> show ethernet-switching mac-learning-log | match 00:19:e0:f8:f1:3b

Wed May 19 18:54:58 2010  vlan_name VLAN5 mac 00:19:e0:f8:f1:3b was
learned on ae1.0
Wed May 19 18:54:58 2010  vlan_name VLAN5 mac 00:19:e0:f8:f1:3b was
deleted on ae1.0
Wed May 19 18:55:01 2010  vlan_name VLAN5 mac 00:19:e0:f8:f1:3b was
learned on ae1.0
Wed May 19 18:55:01 2010  vlan_name VLAN5 mac 00:19:e0:f8:f1:3b was
deleted on ae1.0
Wed May 19 18:55:04 2010  vlan_name VLAN5 mac 00:19:e0:f8:f1:3b was
learned on ae1.0
Wed May 19 18:55:04 2010  vlan_name VLAN5 mac 00:19:e0:f8:f1:3b was
deleted on ae1.0
 ....
....

Does anybody know what does "Immediate aging" or "No such entry" mean?