Pxf Troubleshooting Information - Cisco 7401ASR Installation And Configuration Manual

PXF Troubleshooting Information

PXF Troubleshooting Information
Note The VPN Acceleration Module (VAM) is not compatible with the PXF processor.
Cisco IOS Statistics Not Supported by PXF
Some standard Cisco IOS statistics are not supported in the PXF path, including:
•
•
•
Features Not Supported by PXF
Features that are not supported by PXF are punted to the Route Processor (RP), which can cause high
RP CPU usage.
High PXF CPU Usage
Enter the show pxf accounting summary command to display information about PXF CPU usage:
Router# show pxf accounting summary
.
.
.
10 second averages: PXF complex busy: 1% PXF read pipeline full: 0%
The PXF has 16 processors, only one of which is in use at a time when there is a low traffic rate. Even
though only one of the processors is working, all of the PXF processors are slightly slowed. At higher
traffic rates, many of the PXF processors are working at the same time, but there is no additional slow
down.
High Route Processor CPU Usage
High RP CPU usage may result from punting of packets from the PXF processors to the RP. Enter the
show pxf accounting summary command to view the number and cause of punts.
Router# show pxf accounting summary
Pkts
Cisco 7401ASR Installation and Configuration Guide
5-8
Subinterface counters
ATM VC counters
Class-match statistics on classes with neither policing nor class-based weighted fair queueing
(CBWFQ)
Dropped RP Processed
Total
PXF Statistic:
Packets RP -> PXF:
switch ip:
switch raw:
qos fastsend:
qos enqueue:
Total:
Packets PXF -> RP:
qos pkts:
fast pkts:
drops:total
punts:total
" not IP
" CEF no adjacency
Total:
Ignored
0 48360
0
30048360
0
1938
30050298
1938
30000000
0
48360
: 40572
: 7788
30050298
Chapter 5 Troubleshooting
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OL-5419-01 B0