Cisco Cisco MGX 8880 Media Gateway Release Notes
8
Release Notes for Cisco MGX Route Processor Module (RPM-XF) for PXM45-based Switches Release 5.4.00
OL-11808-01
New Features
SAR Cumulative Queue Size Counters
The SAR cumulative queue size counters display the sum of all queue size configurations of the VCs
belonging to a traffic class. These counters, in conjunction with the buffer pool usage counters, provide
information about over-subscription, if any.
belonging to a traffic class. These counters, in conjunction with the buffer pool usage counters, provide
information about over-subscription, if any.
To display the cumulative queue size configuration for each class and detect potential oversubscription
of buffer classes, enter the show controllers switch 1 command. (CSCei21134)
of buffer classes, enter the show controllers switch 1 command. (CSCei21134)
RPM-XF_SF#show controllers switch 1 sar
Interface Switch1 is up
...
Data Seg SAR cumulative queue size per buffer class:
Data Seg SAR Class 1 cumulative queue size : 0x000003C0
Data Seg SAR Class 2 cumulative queue size : 0x00007C80
Data Seg SAR Class 3 cumulative queue size : 0x00000000
Data Seg SAR Total cumulative queue size : 0x00008040
...
RPM-XF_SF#
SAR CoS Queue and Weight Allocation
This release improves the CoS weight calculation to overcome the deficit counter wrap issue. The weight
of a cosq controls the average number of cells a cosq services at each turn. The deficit counter keeps
track of the actual number of cells serviced at each turn. If a wrap-around of the deficit counter occurs,
it can cause inconsistencies in bandwidth distribution between classes of a service policy. Release 5.3.00
resolves this problem.
of a cosq controls the average number of cells a cosq services at each turn. The deficit counter keeps
track of the actual number of cells serviced at each turn. If a wrap-around of the deficit counter occurs,
it can cause inconsistencies in bandwidth distribution between classes of a service policy. Release 5.3.00
resolves this problem.
SAR 1.4 Upgrade
This release integrates the new GA version of SAR ucode from Mindspeed, which has backward support
for version 1.3. This new version has critical bug fixes.
for version 1.3. This new version has critical bug fixes.
Control Plane Policing
Control Plane Policing (CoPP) increases router security by protecting the route processor from
unnecessary and potentially malicious traffic. The route processor handles important and time critical
packets, such as layer 2 and layer 3 keep alive messages, routing protocol updates, control protocol,
network management, and other process level tasks related to control plane operation. Without CoPP, the
control and management planes can be vulnerable to high rates of undesirable traffic that can interfere
with routing stability, reachability, and packet delivery.
unnecessary and potentially malicious traffic. The route processor handles important and time critical
packets, such as layer 2 and layer 3 keep alive messages, routing protocol updates, control protocol,
network management, and other process level tasks related to control plane operation. Without CoPP, the
control and management planes can be vulnerable to high rates of undesirable traffic that can interfere
with routing stability, reachability, and packet delivery.
Note
The RPM-XF does not support control plane protection options host, cef-exception, or transit.