Troubleshooting guide

12-15
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 12 Troubleshooting Layer 2 Interfaces
Troubleshooting Integrated Routing and Bridging
Follow these steps to troubleshoot the status of an IRB configuration:
Step 1 Use the show interface bvi number command to check the configuration and status of the BVI.
Switch# show interface bvi 1
BVI1 is up, line protocol is up
Hardware is BVI, address is 0000.0ccb.292c (bia 0000.0000.0000)
Internet address is 172.20.52.123/29
MTU 1500 bytes, BW 10000 Kbit, DLY 5000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
ARP type: ARPA, ARP Timeout 04:00:00
Queueing strategy: fifo
Output queue 0/0, 0 drops; input queue 0/75, 0 drops
Switch#
Step 2 Check the BVI field. It should indicate up.
Step 3 Check the Internet address field. It should include a valid address for routing.
Step 4 Use the show interface irb command to check the configuration and status of the IRB connections.
Switch# show interface irb
ATM0/0/0
.
(Information Deleted)
.
FastEthernet3/0/5
Routed protocols on FastEthernet3/0/5:
ip
Bridged protocols on FastEthernet3/0/5:
appletalk clns ip ipx
Software MAC address filter on FastEthernet3/0/5
Hash Len Address Matches Act Type
0x00: 0 ffff.ffff.ffff 0 RCV Physical broadcast
0x1D: 0 0090.2156.d83c 0 RCV Interface MAC address
0x20: 0 0000.0ccb.292c 0 RCV Bridge-group Virtual Interface
0x2A: 0 0900.2b01.0001 0 RCV DEC spanning tree
0xC0: 0 0100.0ccc.cccc 1185 RCV CDP
0xC1: 0 0100.0ccc.cccd 0 RCV SSTP MAC address
0xC2: 0 0180.c200.0000 0 RCV IEEE spanning tree
0xC2: 1 0180.c200.0000 0 RCV IBM spanning tree
0xC2: 2 0100.0ccd.cdce 0 RCV VLAN Bridge STP
FastEthernet3/0/6
.
(Information Deleted)
.
BVI1
Routed protocols on BVI1:
ip
Tunnel0
Switch#