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Te 4/1 Desg 128.419 128 20000 FWD 20000 P2P Yes
Te 4/8 Root 128.426 128 20000 FWD 20000 P2P No
Te 4/9 Altr 128.427 128 20000 BLK 20000 P2P No
Dell#
Example (EDS,
LBK)
NOTE: “LBK_INC” (bold) means Loopback BPDU Inconsistency.
Dell#show spanning-tree rstp br
Executing IEEE compatible Spanning Tree Protocol
Root ID Priority 32768, Address 0001.e801.6aa8
Root Bridge hello time 2, max age 20, forward delay 15
Bridge ID Priority 32768, Address 0001.e801.6aa8
We are the root
Configured hello time 2, max age 20, forward delay 15
Interface Designated
Name PortID Prio Cost Sts Cost Bridge ID PortID
- ---- ------- --- ------- -------------------- --------
Te 1/1 128.257 128 20000 EDS 0 32768 0001.e801.6aa8 128.257
Interface
Name Role PortID Prio Cost Sts Cost Link-type Edge
--- ------ -------- ---- ------- --- ------- --------- ----
Te 1/1 ErrDis 128.257 128 20000 EDS 0 P2P No
Dell#show spanning-tree rstp
Root Identifier has priority 32768, Address 0001.e801.6aa8
Root Bridge hello time 2, max age 20, forward delay 15, max
hops 0
Bridge Identifier has priority 32768, Address 0001.e801.6aa8
Configured hello time 2, max age 20, forward delay 15, max
hops 0
We are the root
Current root has priority 32768, Address 0001.e801.6aa8
Number of topology changes 1, last change occurred 00:00:31
ago on Te 1/1
Port 257 (TenGigabitEthernet 1/1) is LBK_INC Discarding
Port path cost 20000, Port priority 128, Port Identifier
128.257
Designated root has priority 32768, address 0001.e801.6aa8
Designated bridge has priority 32768, address 0001.e801.6aa8
Designated port id is 128.257, designated path cost 0
Number of transitions to forwarding state 1
BPDU : sent 27, received 9
The port is not in the Edge port mode
Example
(Guard)
Dell#show spanning-tree rstp guard
Interface
Name Instance Sts Guard type
--------- -------- -------------------
Te 1/1 0 INCON(Root) Rootguard
Te 1/2 0 FWD Loopguard
Te 1/3 0 BLK Bpduguard
1568
Rapid Spanning Tree Protocol (RSTP)