User Manual

Utility Commands AT8902M
AT8902M CLI Reference Manual Page 5 - 46
TX A packet transmitted by the device.
Intf The interface that the packet went out on. Format used is
port/slot (internal interface number).
Source_Mac Source MAC address of the packet.
Versi on Spanning tree protocol version (0-3). 0 refers to STP, 2
RSTP and 3 MSTP.
Root_Mac MAC address of the CIST root bridge.
Root_Priority Priority of the CIST root bridge. The value is between 0
and 61440. It is displayed in hex in multiples of 4096.
Path_Cost External root path cost component of the BPDU.
5.11.3.1 no debug spanning-tree bpdu transmit
This command disables tracing of transmitted spanning tree BPDUs.
Format
no debug spanning-tree bpdu transmit
Mode Privileged EXEC
5.11.4 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
disabled
Format debug spanning-tree bpdu receive
Mode Privileged EXEC
A sample output of the trace message is shown below.
<15> 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:
RX
A packet received by the device.
Intf The interface that the packet came in on. Format used is
port/slot (internal interface number).
Source_Mac Source MAC address of the packet.
Versi on Spanning tree protocol version (0-3). 0 refers to STP, 2
RSTP and 3 MSTP.
Root_Mac MAC address of the CIST root bridge.
Root_Priority Priority of the CIST root bridge. The value is between 0
and 61440. It is displayed in hex in multiples of 4096.
Path_Cost External root path cost component of the BPDU.
5.11.4.1 no debug spanning-tree bpdu receive
This command disables tracing of received spanning tree BPDUs.