Utility Commands
421
M4100 Series ProSAFE Managed Switches
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.
Command example:
(NETGEAR Switch) #debug spanning-tree bpdu receive
<15> JAN 01 01:02:04 192.168.17.29-1 DOT1S[191096896]: dot1s_debug.c(1249) 101 % Pkt RX
- Intf: 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 parameters that are shown in the following table are displayed in the trace message.
no debug spanning-tree bpdu receive
This command disables tracing of received spanning tree BPDUs.
Default disabled
Format debug spanning-tree bpdu receive
Mode Privileged EXEC
Parameter Definition
RX A packet received by the device.
Intf The interface that the packet came in on. Format used is slot/port (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.
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.
Format no debug spanning-tree bpdu receive
Mode Privileged EXEC
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