switch MAC address table Query
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06-15-2021 12:22 AM - edited 06-18-2021 08:40 AM
If on L3 core switch of LAN network,I am learning MAC by static method and there is no dynamic learned MAC then what is the meaning of that?
Can we confirm that there is no Vlan configured on any port of switch?
#sh mac address-table vlan 2
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
All xxxx.xxxx.xxxx STATIC CPU
till 20 MAC
All XXXX.XXXX.XXXX STATIC CPU
Total Mac Addresses for this criterion: 20
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LAN Switching
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06-15-2021 01:59 AM
These are used for traffic that is destined for the switch itself as opposed to transient traffic.
static MAC addresses can be assigned as multicast addresses.
static MAC address can be manually assigned
You might be using port security as well.
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06-15-2021 02:17 AM
If I am not learning any MAC dynamically means Vlan is not used at access layer right?
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06-15-2021 03:28 AM
Hello @knaik99 ,
if you are using port security the MAC addresses are stored in a separate table and considered STATIC as noted by @Mohsin Alam .
20 STATIC MAC addresses in a VLAN are unlike you should see just one STATIC CPU for the SVI. In your case it is likely that port security is applied.
Hope to help
Giuseppe
