Cata2950_2#sho spanning-tree uplinkfast
UplinkFast is enabled
02:45:18: %SPANTREE_FAST-7-PORT_FWD_UPLINK: VLAN0020 FastEthernet0/11 moved to Forwarding (UplinkFast).
Station update rate set to 150 packets/sec.
UplinkFast statistics
-----------------------
Number of transitions via uplinkFast (all VLANs) : 1
Number of proxy multicast addresses transmitted (all VLANs) : 4
Name Interface List
-------------------- ------------------------------------
VLAN0001 Fa0/24(fwd)
VLAN0010 Fa0/24(fwd)
VLAN0020 Fa0/11(fwd)
VLAN0030 Fa0/24(fwd)
backbonefast
uplinkfastは即座にFWDになり、メッセージも表示されるが、backbonefastはLIS→LRNを経る。だが、本来ならBPDU消失を検知してからこの移行を実施するので、 それを省略することによりより速い切り替えをおこなう。
Cata2950_2#sho spanning-tree backbonefast
BackboneFast is enabled
BackboneFast statistics
-----------------------
Number of transition via backboneFast (all VLANs) : 1
Number of inferior BPDUs received (all VLANs) : 1
Number of RLQ request PDUs received (all VLANs) : 0
Number of RLQ response PDUs received (all VLANs) : 1
Number of RLQ request PDUs sent (all VLANs) : 1
Number of RLQ response PDUs sent (all VLANs) : 0
Cata2950_2#sho sp vl 20
VLAN0020
Spanning tree enabled protocol ieee
Root ID Priority 32788
Address 000b.fdb9.a680
Cost 19
Port 12 (FastEthernet0/12)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32788 (priority 32768 sys-id-ext 20)
Address 0016.9da0.4ec0
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 15
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/10 Altn BLK 19 128.10 P2p
Fa0/12 Root FWD 19 128.12 P2p
Fa0/16 Desg BKN*19 128.16 P2p *LOOP_Inc
Cata2950_2#sho spanning-tree inconsistentports
Name Interface Inconsistency
-------------------- ---------------------- ------------------
VLAN0020 FastEthernet0/16 Loop Inconsistent
loop guard
Cata3550#sho udld gigabitEthernet 0/1
Interface Gi0/1
---
Port enable administrative configuration setting: Follows device default
Port enable operational state: Enabled
Current bidirectional state: Bidirectional
Current operational state: Advertisement - Single neighbor detected
Message interval: 15
Time out interval: 5
Entry 1
---
Expiration time: 41
Device ID: 1
Current neighbor state: Bidirectional
Device name: CAT0732Z28X
Port ID: Gi0/1
Neighbor echo 1 device: CAT0704Z0SX
Neighbor echo 1 port: Gi0/1
Message interval: 5
CDP Device name: SW2