terence 发表于 2018-9-26 14:14
STP的根桥在哪里 - -

这个跟STP 根桥有关系吗？ 怎么看 思科命令不熟啊:L

show spanning-tree
VLAN0999
Spanning tree enabled protocol rstp
Root ID Priority 999
Address 70db.9881.9280
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 999 (priority 0 sys-id-ext 999)
Address 70db.9881.9280
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 480

一看图片就是华为的。。。。。无语

terence 发表于 2018-9-26 14:24
一看图片就是华为的。。。。。无语

用华为的随便画了下 用你哪个命令 有一大排很长 看不懂哪个根桥 ，，，被这个问题搞死了 想不出哪问题

show spanning-tree summary
root-bridge 看看你有哪些vlan的信息

terence 发表于 2018-9-26 14:24
一看图片就是华为的。。。。。无语

VLAN0159
Spanning tree enabled protocol ieee
Root ID Priority 4255
Address e4c7.22a2.2a00
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 4255 (priority 4096 sys-id-ext 159)
Address e4c7.22a2.2a00
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Po1 Desg FWD 3 128.512 P2p
Po2 Desg FWD 3 128.520 P2p
Po3 Desg FWD 3 128.528 P2p
Po4 Desg FWD 3 128.536 P2p
Po5 Desg FWD 3 128.544 P2p
Po6 Desg FWD 3 128.552 P2p
Po7 Desg FWD 3 128.560 P2p
Po8 Desg FWD 3 128.568 P2p
Po9 Desg FWD 3 128.576 P2p
Po10 Desg FWD 3 128.584 P2p
Po20 Desg FWD 3 128.664 P2p
Po22 Desg FWD 3 128.680 P2p
Po24 Desg FWD 3 128.696 P2p
Gi1/1/3 Desg FWD 4 128.27 P2p
找到根桥了 就是核心去防火的那个vlan

LieBenSun0407 发表于 2018-9-26 14:34
show spanning-tree summary
root-bridge 看看你有哪些vlan的信息

CORE3750#show spanning-tree summary
Switch is in pvst mode
Root bridge for: VLAN0159, VLAN0163-VLAN0167, VLAN0200-VLAN0203
EtherChannel misconfig guard is enabled
Extended system ID is enabled
Portfast Default is disabled
PortFast BPDU Guard Default is disabled
Portfast BPDU Filter Default is disabled
Loopguard Default is disabled
UplinkFast is disabled
BackboneFast is disabled
Configured Pathcost method used is short

LieBenSun0407 发表于 2018-9-26 14:34
show spanning-tree summary
root-bridge 看看你有哪些vlan的信息

看是看到了 但不知道跟我上面的问题有关系么？ 我总觉得不是stp协议的问题

如果在出问题时候，二层流量并没中断，估计是有部分流量/VLAN 被环路了。可以在出问题时间段，查一下 CORE3750的 show mac address | in , show spanning-tree detail . 如有问题是有规律的出现、消失，就在每个swich的 show log, 是否有比较规律的接口 up/ down, 或者接口在 STP/VLAN 有规律的 forward-block