06-22-2009 09:24 PM - edited 03-06-2019 06:23 AM
In catalist switch mac address table aging time = 300 sec (by def, and we dont change it). But on practice, we observe that mac address stay more than 5 min in this table (appr - 9,5 min)!
why this occurs?!
06-23-2009 02:48 AM
if I'm correct, the "timer" is renewed when a packet arrives for the respective source MAC address.
If a link goes down, the MAC address is immediately flushed.
06-23-2009 03:17 AM
Yes, its correct.
We have 2 switch and trunk between them.
Connect PC to switch-1, and it mac address is known on switch-2 on trunk port.Disconnect PC and mac address immediatly flush in switch-1 table,but stay known in switch 2 table on trunk port.
in theories PC mac address from table(switch-2) will disappear through 5 mines,but on practice.....
06-23-2009 11:14 AM
and the output of 'show mac-address-table aging' is probably the default of 300?
06-23-2009 10:36 PM
####>sh mac-address-table aging-time
Global Aging Time: 300
Vlan Aging Time
---- ----------
ALL 300
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