Administrator Guide

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 0/0 128.257 128 20000 EDS 0 32768 0001.e801.6aa8 128.257
Interface
Name Role PortID Prio Cost Sts Cost Link-type Edge
--- ------ -------- ---- ------- --- ------- --------- ----
Te 0/0 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 0/0
Port 257 (TenGigabitEthernet 0/0) 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 0/1 0 INCON(Root) Rootguard
Te 0/2 0 FWD Loopguard
Te 0/3 0 BLK Bpduguard
spanning-tree rstp
Configure an RSTP interface with one of these settings: port cost, edge port with optional bridge port data unit (BPDU) guard, port
priority, loop guard, or root guard.
C9000 Series
Syntax
spanning-tree rstp {cost port-cost | edge-port [bpduguard [shutdown-on-
violation]] | priority priority | {loopguard | rootguard}}
Parameters
cost port-cost Enter the keyword cost then the port cost value. The range is from 1 to 200000. The
defaults are:
• 10-Gigabit Ethernet interface = 2000
• Port Channel interface with one 10-Gigabit Ethernet = 2000
• Port Channel with two 10 Gigabit Ethernet = 1800
edge-port Enter the keywords edge-port to configure the interface as a rapid spanning tree edge
port.
1354 Rapid Spanning Tree Protocol (RSTP)