Specifications

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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
Upgrading Cards
To replace an RPM card that is configured for redundancy, first switch control to the standby card, then
replace the card while it is operating in standby mode. If the card you are replacing has failed, there is
no reason to switch cards, as the failure should have triggered a switch to the standby card. If you need
to switch cards, enter the softswitch command as described in the “Switching Between Redundant
RPM-PR Cards” section in Chapter 7, “Switch Operating Procedures.”
Note After you replace a card that is configured for redundancy, it starts up in standby mode. If the active card
is configured to operate as a standby card for multiple RPM cards, enter a softswitch command so that
the active card returns to its normal standby state.
Upgrading Cards
When you upgrade a card, you are replacing an existing card with a newer version of that card. The
following sections describe how to,
• Replace PXM45 cards with PXM45/B cards
• Replace AXSM cards with AXSM/B cards
Note If you plan to upgrade PXM45 cards and AXSM cards, upgrade the PXM45 cards first. Wait until the
PXM45/B cards are operating in active and standby modes with the correct software before upgrading
AXSM cards. The software version used by the PXM45/B cards should be equal to or later than the
version used on the AXSM, AXSM/B, and AXSME cards.
Replacing PXM45 Cards with PXM45/B Cards
PXM45 front cards can be replaced with PXM45/B cards while the switch is operating. If a PXM45 is
operating in standalone mode, all calls are interrupted until the PXM45 is replaced and the PXM45/B
card is operating correctly. If the switch is using redundant PXM45s, enter the switchcc command, if
necessary, to ensure that the card you want to replace is operating in standby mode. For redundant
PXM45 cards, you are ready to replace the standby card as soon as the other card becomes active. You
do not need to wait for the standby card to reach standby mode.
After you replace the PXM45 card, enter the dspcd or dsprev command to view the boot software
version. If the boot software version is not correct for your switch, upgrade it as described in
Appendix A, “Downloading and Installing Software Upgrades.”
Note When replacing PXM45 cards with PXM45/B cards, the switch performs the same nativity check
described earlier in this chapter.
Replacing AXSM Cards with AXSM/B Cards
You can replace AXSM cards with AXSM/B cards of the same type. For example, you can replace an
AXSM-4-622 with and AXSM-4-622/B. 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.