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Dell SmartFabric OS10 User Guide Release 10.5.3

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Media Access Control

All Ethernet switching ports maintain media access control (MAC) address tables. Each physical device in your network contains a MAC address. OS10 devices automatically enter learned MAC addresses as dynamic entries in the MAC address table.

Learned MAC address entries are subject to aging. Set the aging timer to zero (0) to disable MAC aging. For any dynamic entry, if no packet arrives on the device with the MAC address as the source or destination address within the timer period, the address is removed from the table.

  • Enter an aging time (in seconds) in CONFIGURATION mode, from 0 to 1000000, default 1800. 
    mac address-table aging-time seconds
NOTE: On the Dell PowerSwitch S4200-ON series, the default MAC aging time is set as 550 seconds. This is the maximum value that can be configured.

Configure Aging Time 

OS10(config)# mac address-table aging-time 900

Disable Aging Time 

OS10(config)# mac address-table aging-time 0
NOTE: When continuous MAC address movement occurs in a Virtual Link Trunking (VLT) environment, it results in MAC pointing to VLT interconnect on both nodes and it causes traffic loss. This condition gets resolved automatically when the MAC aging time lapses or when MAC is assigned to a single port after the continuous MAC movement stops. To solve this issue manually, use the clear mac address-table command to remove the MAC address entry from the MAC address table. This limitation is applicable to both VLAN and PVLAN.

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