Table - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Chapter 1 The BPX Switch: Functional Overview
• Priority Bumping
This feature allows connections for both BPX and IGX that are classified as more important (via
COS value) to bump existing connections that are of lesser importance when there are insufficient
resources (such as bandwidth) to route these important connections due to trunk failures in the
network. You turn on priority bumping, change parameters, and view the statistics by using the
command cnfbpparm. This feature cannot be turned on until all nodes are upgraded to 9.3
For procedures on using Priority Bumping, see "Optimizing Traffic Routing and Bandwidth" in the
Cisco WAN Switching Command Reference.
UXM ATM Forum IMA Compliant Ports
•
This feature addresses the need for IMA line support between the IGX and either a router, LS 1010,
or an edge device to complete end-to-end interoperability.You can now bundle multiple physical
lines into a logical line to enlarge the traffic bandwidth to support high speed ATM without
upgrading your access line to higher speed service such as T3/E3 line. By grouping a number of
T1/E1 lines with inverse multiplexing of the data flow (ATM Forum IMA protocols) into the group
of T1/E1 lines, the group of lines can be treated as a logical high-bandwidth line to solve the narrow
bandwidth problem with the advantage of availability and cost-effectiveness.
BXM to BXM-E Upgrades
•
It is now possible to gracefully "hitlessly" upgrade an active legacy BXM configured in 16K mode
to an enhanced BXM-E (DX, EX) configured in 32K mode. You can scale up your networks with
the 32K BXM-E on either the port or trunk or a combination of both without any down time and
without any service interruption. This feature also supports BXM-E on APS.
• Separate Abort Stack
Previously, the BPX and IGX switch software logged both critical and non-critical errors into the
Software Error Table. Due to the limited number of entries in the table (12), critical errors (aborts)
could be overwritten by non-critical errors, making it hard to determine the cause of faults. The
separate Software Abort Table contains only the critical abort faults and retrieved Abort
information for reporting and debugging purposes.After an upgrade, old aborts that are stored in
the Software Error Table will not be migrated to the new Software Abort Table. Only new aborts
will be logged into the Abort table.
• Upgrades Protection
This enhancement provides additional protection against running loadrev/runrev and doing
upgrades during the time that statistics collection is enabled. This enhancement will warn and
automatically disable stats collection if the user says "Yes" to the warning prompt.
VSI MIB Support
•
Enables the BPX software to track specific information about a VSI controller (such as type,
capability, resource usage, and so on). In order for the network amangement system to find out
about them, they need to query the controller directly via SNMP. This enhancement is to provide
via SNMP MIB the capability to query the BPX switch for VSI controllers attached to that switch
and associated information. This allows for easier discovery of BPX-attached VSI controllers by
external SNMP-capable application (including Cisco WAN Manager).
• Support for <50 cps on connections on the BXM and UXM cards.
With policing turned off this will be supported on all interface types. However, with policing on,
the minimum rate will be lowered to 12 to 6 cps only for the T3/E3 and T1/E1 interfaces.
• Enhanced Shaping of the Control Traffic
This feature limits the maximum bandwidth guaranteed by the high priority Qbins so that the
control traffic does not flood the trunk and overtake the bandwidth allocated for user traffic.
Support for 3 VSI Partitions
•
The BXM now supports 3 VSI partitions.
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Cisco BPX 8600 Series Installation and Configuration
New with Release 9.3
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