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Utility Commands
615
ProSafe Managed Switch
no debug spanning-tree bpdu receive
This command disables tracing of received spanning tree BPDUs.
Format no debug spanning-tree bpdu receive
Mode
debug spanning-tree bpdu transmit
This command enables tracing of spanning tree BPDUs transmitted by the switch. Spanning
tree should be enabled on the device and on the interface in order to monitor packets on a
particular interface.
Default
Format debug spanning-tree bpdu transmit
Mode
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 TX
- Intf: 1/0/7(7), Source_Mac: 00:11:88:4e:c2:00 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:
Source_Mac
Source MAC address of the packet.
Version
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.
Privileged EXEC
disabled
Privileged EXEC
Parameter Definition
TX
A packet transmitted by the device.
Intf
The interface that the packet went out 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
Source MAC address of the packet.
Version
Spanning tree protocol version (0-3). 0 refers to STP, 2 RSTP and 3 MSTP.
Root_Mac
MAC address of the CIST root bridge.
Parameter Definition