debug cable-modem bridge

debug cable-modem bridge

Use the debug cable-modem bridge Privileged EXEC command to debug bridge filter processing information on a cable modem. The no form of this command turns debugging messages off.

[no] debug cable-modem bridge

Usage Guidelines

This command first appeared in Cisco IOS Release 11.3 NA.

When the interface is down, all bridge table entries learned on the Ethernet interface are set to discard because traffic is not bridged until the cable interface has completed initialization. After the interface is completely up (the line protocol), bridge table entries learned on the Ethernet interface program the cable’s MAC data filters. The cable MAC hardware filters out any received packets whose addresses, are not in the filters. In this way, the cable interface only receives packets addressed to its own MAC address or an address it has learned on the Ethernet interface.

Sample Display

Figure 5 shows sample display output for the debug cable-modem bridge Privileged EXEC command

Figure 5 Sample Debug Cable-Modem Bridge Output

uBR904# debug cable-modem bridge

%LINEPROTO-5-UPDOWN: Line protocol on Interface cable-modem0, changed state to downshut

cm_tbridge_add_entry(): MAC not initialized, discarding entry: 00e0.fe7a.186fno shut

cm_tbridge_add_entry(): MAC not initialized, discarding entry: 00e0.fe7a.186f

%LINEPROTO-5-UPDOWN: Line protocol on Interface cable-modem0, changed state to up

cm_tbridge_add_entry(): Adding entry 00e0.fe7a.186f to filter 2

Related Commands

debug cable-modem bpkm debug cable-modem error debug cable-modem interrupts debug cable-modem mac debug cable-modem map

Troubleshooting Tips for the Cisco uBR904 Cable Modem 45

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Cisco Systems manual Debug cable-modem bridge, UBR904# debug cable-modem bridge

UBR904 specifications

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In summary, the Cisco UBR904 is a robust, feature-rich broadband access device that combines high performance, advanced technologies, and scalability, making it an excellent choice for operators looking to deliver high-speed internet and data services across diverse environments. Its ease of use and extensive management features further enhance its appeal, positioning it as a key player in the broadband access market.