Troubleshooting guide

Bridge group 1 is executing the ieee compatible Spanning Tree protocol
Bridge Identifier has priority 32768, address 0001.96a4.a8bc
Configured hello time 2, max age 20, forward delay 15
Current root has priority 32768, address 0000.0c25.36f4
Root port is 3 (ATM0), cost of root path is 1562
Topology change flag not set, detected flag not set
Number of topology changes 2 last change occurred 00:00:56 ago from Ethernet0
Times: hold 1, topology change 35, notification 2
hello 2, max age 20, forward delay 15
Timers: hello 0, topology change 0, notification 0, aging 300
Port 2 (Ethernet0) of Bridge group 1 is forwarding
Port path cost 100, Port priority 128, Port Identifier 128.2.
Designated root has priority 32768, address 0000.0c25.36f4
Designated bridge has priority 32768, address 0001.96a4.a8bc
Designated port id is 128.2, designated path cost 1562
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
BPDU: sent 44, received 0
Port 3 (ATM0) of Bridge group 1 is forwarding
Port path cost 1562, Port priority 128, Port Identifier 128.3.
Designated root has priority 32768, address 0000.0c25.36f4
Designated bridge has priority 32768, address 0000.0c25.36f4
Designated port id is 128.17, designated path cost 0
Timers: message age 2, forward delay 0, hold 0
Number of transitions to forwarding state: 1
BPDU: sent 2, received 53
Router#
Is there an entry in the bridge table?
When you are sure that your bridged interface is forwarding, you need to determine if you have the Layer 2
media access control (MAC) address of your ISP's gateway router. Use the show bridge command to check
for the Layer 2 address. This command lists all the Layer 2 entries for a specific bridge group.
In the following example, there are two entries in the bridge table. The first entry is the MAC address of the
PC client in the LAN. The second entry is the MAC address of the ISP's gateway router (default gateway). If
the MAC address of the ISP's gateway router is not in the bridge table, contact your ISP to verify your
network settings.
Router#show bridge
Total of 300 station blocks, 298 free
Codes: P − permanent, S − self
Bridge Group 1:
Address Action Interface Age RX count TX count
0010.a492.e1d2 forward Ethernet0 4 163 4
0010.7bb9.bd1a forward ATM0 0 4 3
Router#
Related Information
Cisco DSL Technology Support Information•
Cisco DSL Product Support Information•
Technical Support − Cisco Systems•
Cisco DSL Router Configuration and Troubleshooting Guide