Nortel 5500 series, Руководство по установке

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Nortel Ethernet Routing Switch 5500 Series Stack Configuration 55
Initial installation
During the initial installation of the stack, the software automatically
determines the physical order of all units in the stack according to the
position of the base unit within the stack. Thereafter, the individual units
maintain their original unit numbering, even if the position of one or more
units in the stack is changed.
For example, when the stack is initially powered, the base unit becomes unit
1 and the unit that the base unit connects to (via the Cascade Down cable)
becomes unit 2 (and the next unit is unit 3 and so on), until the maximum
stack configuration (up to 8 units) is reached. If the base unit is changed to
another unit in the stack, the new base unit keeps its original unit number
in the stack.
Stack MAC address
When a switch participates in a stack configuration, a stack MAC address is
automatically assigned during stack initialization. The stack MAC address is
the base unit MAC address plus 1. If another unit in the stack is assigned
as the base unit, the new stack MAC address is the MAC address of the
new base unit plus 1. 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 LED display panel moving to a steady
amber state.
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. Also, if the original unit rejoins the
stack, it will not resume base unit status. For this reason, always assign
the temporary base unit as the base unit until the failed unit is repaired
or replaced.
Note: If the temporary base unit is not assigned as the new base
unit, and the temporary base unit fails, the next unit in the stack order
becomes the temporary base unit. This process will continue after
successive failures until only two units are left in the stack.
Removing a stack unit
If a unit is removed from the stack (therefore operating in standalone mode),
the following switch configuration settings revert to those configured before
the unit became a member of the stack:
• IP address
Nortel Ethernet Routing Switch 5500 Series
Installation
NN47200-300 2.00 Standard
5.0 7 July 2006
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