Troubleshooting guide

11-33
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 11 Troubleshooting Layer 3 Network Connections
Troubleshooting IP Layer 3 Connections
Step 1 From the Catalyst 8540-1, use the show epc ip-prefix interface command to display the status of the
CAM table for the ingress interface in question.
C8540CSR-1# show epc ip-prefix interface FastEthernet 1/0/15 all-entries
Default Network Information:
Not configured
Prefix/Masklen Next Hop
0.0.0.0/32 not populated
10.0.0.7/32 20.0.0.1
10.0.1.4/30 20.0.0.1
10.0.1.12/30 20.0.0.1
10.0.1.24/30 20.0.0.1
10.0.1.124/30 20.0.0.1
11.1.1.0/30 20.0.0.1
11.1.2.0/30 20.0.0.1
11.1.3.0/24 20.0.0.1
11.1.9.0/24 20.0.0.1
11.1.10.0/24 20.0.0.1
11.1.40.0/24 20.0.0.1
11.1.100.0/24 20.0.0.1
11.1.120.0/24 20.0.0.1
15.15.15.0/24 20.0.0.1
20.0.0.0/24 SRP
20.0.0.0/32 SRP
20.0.0.1/32 not populated
20.0.0.2/32 SRP
20.0.0.255/32 SRP
20.0.1.0/24 SRP
20.0.1.0/32 SRP
20.0.1.2/32 SRP
20.0.1.255/32 SRP
172.17.110.0/24 20.0.0.1
172.17.110.96/27 20.0.0.1
224.0.0.0/4 not populated
224.0.0.0/24 SRP
255.255.255.255/32 not populated
Total IP Prefix Entries in CAM:25
Missing IP Prefix Entries in CAM:0
CEF entries not populated:4
C8540CSR-1#
The Prefix/Masklen indicates the IP addresses and subnet masks of connections in the interface CAM
table.
The Not configured field indicates no default route is known. If you added IP route 0.0.0.0 20.0.0.1 to
that configuration, the display would change to include the following:
Default Network Information:
Nexthop 1:
IP addr:20.0.0.1 GigabitEthernet2/0/1 (58)
Mac Addr:0090.2141.bd47
Load Balancing:Off
Note Since there is only one route, the Load Balancing field is Off.
The next hop column contains the following descriptions:
• Not populated—Indicates this is an entry for either an end station or a next hop router interface. To
display entries in the CAM for these connections, use the show epc ip-address interface command
with the all-entries parameter.
• IP address—Indicates the next hop in the CAM is to this IP address from this source prefix.