Netgear GSM7224P GSM5212P/GSM7212P/GSM7212F/GSM7224P CLI Manual - Page 577

ProSafe Managed Switch debug spanning-tree bpdu This command enables tracing of spanning tree BPDUs received and transmitted by the switch. Default Format Mode disabled debug spanning-tree bpdu Privileged EXEC no debug spanning-tree bpdu This command disables tracing of spanning tree BPDUs. Format Mode no debug spanning-tree bpdu Privileged EXEC debug spanning-tree bpdu receive This command enables tracing of spanning tree BPDUs received by the switch. Spanning tree should be enabled on the device and on the interface in order to monitor packets for a particular interface. Default Format Mode disabled debug spanning-tree bpdu receive Privileged EXEC A sample output of the trace message is shown below. JAN 01 01:02:04 192.168.17.29-1 DOT1S[191096896]: dot1s_debug.c(1249) 101 % Pkt RX - Intf: 1/0/9(9), Source_Mac: 00:11:88:4e:c2:10 Version: 3, Root Mac: 00:11:88:4e:c2:00, Root Priority: 0x8000 Path Cost: 0 The following parameters are displayed in the trace message: Parameter RX Intf Source_Mac Version Root_Mac Root_Priority Path_Cost Definition A packet received by the device. The interface that the packet came in on. Format used is unit/port/slot (internal interface number). Unit is always shown as 1 for interfaces on a non-stacking device. Source MAC address of the packet. Spanning tree protocol version (0-3). 0 refers to STP, 2 RSTP and 3 MSTP. MAC address of the CIST root bridge. Priority of the CIST root bridge. The value is between 0 and 61440. It is displayed in hex in multiples of 4096. External root path cost component of the BPDU. Utility Commands 577