HP Comware 5 Debug Manual Vol 3

Field
Description
Port PortID(PortName) VLAN
VLANID Rcvd Type
Packet(Length:Number)
Port PortID(PortName) received a BPDU of type Type on VLAN VLANID and
at length Number (in bytes).
The possible values of the Type argument are:
• Stp.
• Rstp.
• Mstp-dot1s.
• Mstp-legacy.
ProtocolVersionID Protocol version ID.
BPDUType BPDU type.
CIST Root ID CIST root bridge ID.
External RPC External root path cost.
Reg Root ID Regional root bridge ID.
Internal RPC Internal root path cost.
(Instance)Flags:
(InstanceID)Port-Role[Flag]
Information about the BPDU:
• InstanceID—MSTI ID.
• Port-Role—The role of the port that sent or received the BPDU on the
named MSTI. The possible port roles are:
 Mast—Master port.
 Altn—Alternate or backup port.
 Root—Root port.
 Desi—Designated port.
• Flag—BPDU type or port state:
 BPDU types include Ta (TCA BPDU), P (proposal BPDU), A (agreement
BPDU), and Tc (TC BPDU).
 Port states include F (forwarding) and L (learning). If no port state is
displayed, the port is in discarding state.
PKT
Packet debugging information, including:
• Port number.
• Port name.
• Packet direction (inbound/outbound).
• Packet type.
• Packet length.
• Entire packet content displayed in hexadecimal format.
Examples
# In MSTP mode, enable debugging for received STP BPDUs on all ports.
<Sysname> debugging stp packet receive
*Mar 18 14:28:41:781 2010 Sysname MSTP/7/PKT:
Port386(Ethernet1/1) Rcvd Mstp-legacy Packet(Length: 103)
ProtocolVersionID: 03
BPDUType : 02
CIST Root ID : 32768.000f-e200-3700
External RPC : 0
Reg Root ID : 32768.000f-e200-3700
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