Nortel Networks 450 manual Stack MAC Address, Temporary Base Unit

Using the BayStack 450 10/100/1000 Series Switch

Stack MAC Address

The Stack MAC address is automatically assigned during the stack initialization. The base unit’s MAC address, with a software offset, is used for the Stack MAC address.

For example, if the base unit’s MAC address is:

00-00-82-99-44-00

and the Stack software offset is: 1F

then the Stack MAC address becomes:

00-00-82-99-44-1F

If you designate another unit in the stack as the base unit, the MAC address of the new base unit (with offset) now applies to the stack configuration. The original stack IP address still applies to the new base unit.

Temporary Base Unit

If an assigned base unit fails, the next unit in the stack order automatically becomes the new temporary base unit. This change is indicated by the Base LED on the temporary base unit’s LED display panel turning on (amber). For detailed information about the base LED, see Table 1-1 on page 1-6.

This automatic failover is a temporary safeguard only. If the stack configuration loses power, the temporary base unit will not power up as the base unit when power is restored. For this reason, you should always assign the temporary base unit as the base unit (set the Unit Select switch to Base) until the failed unit is repaired or replaced.

Note: If you do not reassign the temporary base unit as the new base unit, and the temporary base unit fails, the next unit directly downstream from this unit becomes the new temporary base unit. This process can continue until there are only two units left in the stack configuration.

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