CAM table - 2960

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Feb 5th, 2010
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Hi


How do I identify if my CAM Table is full on Cisco 2960

how many mac address entry can 2960 store


If I have /22 network ; how does it impact 2960 box


We noticed performance degraded for end users?

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milan.kulik Fri, 02/05/2010 - 05:25
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Hi,


the datasheet says "up to 8000 MAC addresses".


sh mac address-table count

should show you

Total Mac Address Space Available: xxxx

on the last output line.


This works on 3750s, I hope also on 2960s.


HTH,

Milan

sachinraja Fri, 02/05/2010 - 09:19
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Milan is right.


it supports 8024 to be precise.. Please find the sample output from a 2960 switch:


switch1#show mac-address-table count

Mac Entries for Vlan 10:
---------------------------
Dynamic Address Count  : 5
Static  Address Count  : 0
Total Mac Addresses    : 5

Mac Entries for Vlan 1:
---------------------------
Dynamic Address Count  : 1
Static  Address Count  : 0
Total Mac Addresses    : 1


Total Mac Address Space Available: 8024


how many MACs do you have ? why would you have 8024 entries on one vlan ? 2960 is a layer 2 switch, and i suppose you use it for edge networks.. why would you have a VLAN with /16 subnet ? as per design rules, its good to split this into multiple vlans with lesser subnet masks..


Hope this helps.. all the best


Raj

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