Troubleshooting guide

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•
Contact the Cisco Technical Assistance Center
If you need additional assistance implementing RFC1483 pure bridging, contact the Cisco Technical
Assistance Center (TAC).
Note: To use the Case Open tool to open a case online, you must be a registered user and you must be logged
in.
Call the TAC
If you do not have a service contract with Cisco and need assistance implementing RFC1483 pure bridging,
direct your web browser to Cisco's Warranty Status Tool.
Cisco DSL Router– RFC1483 Pure Bridging Page
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Cisco DSL Router Configuration and Troubleshooting Guide