Troubleshooting guide

11-35
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 11 Troubleshooting Layer 3 Network Connections
Troubleshooting IP Layer 3 Connections
LSIPC requested: Total: 214759866 Mlet: 214759866
Sent:Total: 214759866 Mlet: 214759866 No-resp: 214757881 Resp-required: 1985
Broadcast IPCs:Requested: 119 Sent: 119
Queued: 119 Current qsize: 0 Max qsize-reached: 20
Received:Total: 246923174 Unsolicited: 214753326 Response: 1985
Recv Q size: 0
LSIPC Failures:
Toobig: 0 Memory Fail: 0 Packet fail: 0 Invalid VC: 0
Invalid resp: 0 Retries: 0 Timeouts: 0 Ack timeouts: 0
Bcast: Failed: 0 Pkt failed: 0 enq failed: 0 discard: 0
Unicast: Enq failed: 0
C540CSR-1#
Check the Bcast fields for any failures. If messages are getting dropped, that could cause inconsistencies
in the routing table transfers between the route processor and Ethernet processor interfaces and Gigabit
processor interfaces. For example, the IPC communications could have failed.
Step 5 From the Catalyst 8540-1, use the show epc ifmapping command to display the status of the interface
mapping of the egress interface.
C8540CSR-1# show epc ifmapping 4
GigabitEthernet0/0/0 (IF number: 4)
The IF number field, in this example “(4)”, indicates the interface index number is mapping correctly.
Step 6 From the Catalyst 8540-1, use the show epc patricia interface command with the ipucast detail
parameters on the ingress interface to display the status of the Host Entry CAM location for the
connection to Host B.
C8540CSR-1# show epc patricia interface FastEthernet 1/0/15 ipucast detail
.
(Information Deleted)
.
22#HOST Entry CAM location: 0x102D
IP addr:10.85.66.5 Host IF Number:4 Entry:Valid
Mac Addr:0090.21dd.dddd
.
(Information Deleted)
.
C8540CSR-1#
The Mac Addr field in the command display indicates the correct MAC address for IP address
10.85.66.5, the next hop, is at the CAM entry location with hexadecimal address 0x102D.
Step 7 From the Catalyst 8540-1, use the show epc cam interface command with the CAM location
hexadecimal address 0x102D and the CAM word 2 parameters to display the status of the MAC rewrite
for this interface.
C8540CSR-1# show epc cam interface FastEthernet 1/0/15 0x102D 2
GigabitEthernet0/0/0 Addr:0x102D Word:2 Data[0]:0x009021DD Data[1]:0xDDDD0045
Figure 11-19 describes the CAM encoding information shown in the show epc cam interface command,
using the CAM location hexadecimal address 0x102D and the CAM word 2 parameters.