Appendix; Upgrade Information; Upgrade Bxm To Bxm-E Cards; Summary Of Commands - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Upgrade Information

This appendix provides special upgrade information.

Upgrade BXM to BXM-E Cards

You can now gracefully upgrade your Broadband Switch Module (BXM) card to a BXM-E card without
any service interruption (on yred BXMs).
The enhanced BXM-E card (version DX or EX) supports a higher connection density (32K) than either
the legacy BXM or regular BXM-E cards. Both DX and EX versions have the same connection density,
providing you with the ability to upgrade networks with the high connection density BXM-Es on trunk
side, port side, or a combination of trunks and ports.
Prior to this feature, upgrading a functioning legacy BXM or regular BXM-E card (configured in low
connection density mode), to the DX or EX version of BXM-E (configured in higher connection density
mode) required deleting all existing connections terminating on the active BXM card and reestablishing
the connections on the new card.
After the BXM-E card replaces the BXM card, the switch software programs all channels on the new
active card or on the hot standby card. The performance effect due to programming the channels is
minimal since the process is done only once for each BXM card. If the cards are yred, autoroute traffic
still can be transported through the active card while the standby BXM-E is programmed.
This section contains both automatic and automatic and manual upgrade scenarios. The benefit of
manually upgrading is that the logical database is not automatically upgraded, thus permitting you to
fall back from BXM-E to BXM without mismatch. The concept of mismatch is introduced when BXM
cards are configured as y-redundancy or 1+1 APS. BXM cards with different connection densities are
not declared as mismatch, so long as the physical density of the latest inserted card is greater or equal
to the density of the other card in the y-redundancy pair.
If VSI was configured on the legacy card, the VSI partition is expanded to allow the extra LCNs. The
additional LCNs are alloated to the first port of the first enabled VSI. This provides a convenient way
to fall back to a former VSI configuration.

Summary of Commands

A full description of these commands is located in the WAN Switching SuperUser Command Reference.
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
A P P E N D I X
Cisco BPX 8600 Series Installation and Configuration
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