Specifications

8-8
Cisco MGX 8850 (PXM45) and MGX 8950 Software Configuration Guide
Release 3, Part Number 78-14788-01 Rev. C0, January 2004
Chapter 8 Switch Maintenance Procedures
Replacing Cards with the Same Card Type
To rebuild the configuration from a configured hard disk in the switch, do the following tasks:
• Clear the configuration (clrallcnf) on the PXM45 front card. Usea PXM45 hard disk card on which
the configuration can be erased. (Do not use the PXM45 hard disk that hosts the configuration you
want to use.)
• Install the unconfigured PXM45 front card and the configured PXM45 hard disk card in a chassis
without a redundant card set.
The switch will build the PXM45 front card configuration from the configuration on the hard disk.
Replacing AXSM Cards
If an AXSM front or back card fails, remove the old card and insert a new card of the same type in the
same slot. If the card is a standalone AXSM, all communications are interrupted. It the card is part of a
redundant AXSM card set, you can replace the standby AXSM without disrupting traffic through the
active card.
The configuration for AXSM cards is stored on the PXM45. The switch will automatically configure a
replacement card and start it up. If the card is a standalone card, the card will start up as an active card.
If the card is part of a redundant pair, the card will start up in standby mode.
After the replacement AXSM card starts, enter the dspcd or dsprev command to verify that the AXSM
card is using the correct boot software version.
Note The switch automatically selects and loads the correct runtime software for the AXSM based on the
configuration for that slot. The switch does not automatically burn boot code for an AXSM. For
instructions on upgrading boot code, see Appendix A, “Downloading and Installing Software
Upgrades.”
Note To replace one type of AXSM front card with another type, you must delete all connections, partitions, ports
and down lines. If an AXSM card fails, the same type of AXSM card must be installed in its slot.
Replacing RPM Cards
If you have properly initialized an RPM card as described in the “Initializing RPM-PR Cards” section
in Chapter 5, “Preparing RPM-PR Cards for Operation,” the configuration for the RPM card is stored on
the PXM45 hard disk.
To replace a standalone RPM card, remove the old card and insert a new card of the same type in the
same slot. The switch will automatically configure the card and start it up.
Note RPM-PR and RPM-B cards are not interchangeable. When replacing an RPM-PR card, you must replace
it with another RPM-PR card. If you want to change types of cards, you must first decommission the slot
as describe in the “Decommissioning an RPM Slot” section later in this chapter.