Troubleshooting guide

11-51
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 11 Troubleshooting Layer 3 Network Connections
Troubleshooting Route Processor Route Table and Utilization Problems
Follow these steps to troubleshoot IPX load balancing:
Step 1 Use the show epc ipx-prefix interface command with the source network number (8512), netmask, and
interface parameters to display the status of the CAM table on the egress interface, to check the load
balancing configuration.
C8540CSR-1# show epc ipx-prefix 8512 00 GigabitEthernet 11/0/1
IPX Prefix Entries in CAM, Interface GigabitEthernet11/0/1
-----------------------------------------------------------------
Codes: C - Connected network, R - Remote network
V - valid entry, N - Network entry
L - load balancing enabled, D - default network
E - EIGRP enabled, I - Internal network
B - BVI network, M - My Mac Address
VC - VCI
GigabitEthernet11/0/1 net 8512 cptr 101D nhop1 101B nhop2 0 encap1 8 encap2 0 flags 9
Step 2 Confirm that the load balancing enabled “L” code appears in the output.
Troubleshooting Route Processor Route Table and
Utilization Problems
The following list describes common symptoms of high route processor utilization. If you notice any of
these symptoms, follow the troubleshooting steps in this section to fix the problem.
• High percentages in the show processes cpu command output
• Input queue drops
• Slow performance
• Services on the switch router fail to respond, for instance:
– Slow response in Telnet or unable to Telnet to the switch router
– Slow response on the console
– Slow or no response to ping
– Switch router does not send routing updates
For additional information about troubleshooting route processor problems, see the IOS document
Troubleshooting High CPU Utilization on Cisco Routers.