Removing A Stack Unit; Stacking Configurations - Nortel 4500 Series Installation Manual

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If the base unit is being replaced, remember that the stack has elected
a temporary base unit and the new unit does not automatically assume
the base unit status. Configure the new unit as the base unit, using the
Unit Select switch, and reset the Unit Select switches of the other stack
members to non-base units.

Removing a stack unit

If you remove a unit from the stack (to operate in stand-alone mode), the
following switch configuration settings revert to those configured before the
unit became a member of the stack:
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Stacking configurations
Because stack parameters are associated with the base unit, the physical
stack order depends on the base unit position and whether you configure
the stack cascade up (stack up) or cascade down (stack down). This
designation depends on the stack cabling arrangement. Nortel recommends
that you use Cascade Down configuration. (see
Copyright © 2007, Nortel Networks
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match the software running on the stack. In addition, when a like-for-like
replacement of a failed unit occurs, any port-specific configuration is
restored .
Action
Remove the failed switch from the stack.
Obtain a like-for-like replacement switch.
With the new unit powered off, physically insert the new unit in the
stack and reconnect the stack cables.
Turn on the new unit.
Depending on the software load on the replacement switch, it may
automatically reboot one or two times before joining the stack as a
fully operational member.
Check the log file on the stack to ensure that the replacement unit
correctly joined the stack. The log file displays AUR information
messages.
IP address
Web, Telnet, and SNMP passwords
SNMP community strings
Nortel Ethernet Routing Switch 4500 Series
Installation Guide
NN47205-300 02.01 Standard
5.0 23 February 2007
Stacking configurations 49
—End—
"Cascade down" (page 50)
Nortel Networks Confidential