>Посмотри отличия по выводу show spanning-tree vlan 14 detail при обоих типах
>подключения 3550 и 3750. Я думаю проблема как раз в промежуточных
>устройствах - про которые ты мало так написал... не лей чай на спину, про железки нет никакой информации
тамошние технари немного рассказали про конфигурашку
мой влан 14 прописан ручками на всех их длинках ( 3526 ), ну и пробрасывается через всю их сеть. стп у них выключен, форвард бпду включен. пообещали что после праздников всё проверят.. типа мало-ли
а вывод такой
на 3750
3750#sh spanning-tree vlan 14 detail
VLAN0014 is executing the ieee compatible Spanning Tree protocol
Bridge Identifier has priority 32768, sysid 14, address 0016.9d94.ec00
Configured hello time 2, max age 20, forward delay 15
Current root has priority 32782, address 0013.19fa.0a80
Root port is 7 (GigabitEthernet1/0/7), cost of root path is 4
Topology change flag not set, detected flag not set
Number of topology changes 84 last change occurred 19:03:44 ago
from GigabitEthernet1/0/10
Times: hold 1, topology change 35, notification 2
hello 2, max age 20, forward delay 15
Timers: hello 0, topology change 0, notification 0, aging 300
Port 7 (GigabitEthernet1/0/7) of VLAN0014 is forwarding
Port path cost 4, Port priority 112, Port Identifier 112.7.
Designated root has priority 32782, address 0013.19fa.0a80
Designated bridge has priority 32782, address 0013.19fa.0a80
Designated port id is 128.1, designated path cost 0
Timers: message age 2, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 956, received 5705960
Port 10 (GigabitEthernet1/0/10) of VLAN0014 is forwarding
Port path cost 19, Port priority 128, Port Identifier 128.10.
Designated root has priority 32782, address 0013.19fa.0a80
Designated bridge has priority 32782, address 0016.9d94.ec00
Designated port id is 128.10, designated path cost 4
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 34326, received 0
3750#
на 3550
molod#sh spanning-tree vlan 14 detail
VLAN0014 is executing the ieee compatible Spanning Tree protocol
Bridge Identifier has priority 32768, sysid 14, address 0013.19fa.0a80
Configured hello time 2, max age 20, forward delay 15
We are the root of the spanning tree
Topology change flag not set, detected flag not set
Number of topology changes 71 last change occurred 00:09:07 ago
from FastEthernet0/3
Times: hold 1, topology change 35, notification 2
hello 2, max age 20, forward delay 15
Timers: hello 1, topology change 0, notification 0, aging 300
Port 1 (FastEthernet0/1) of VLAN0014 is forwarding
Port path cost 19, Port priority 128, Port Identifier 128.1.
Designated root has priority 32782, address 0013.19fa.0a80
Designated bridge has priority 32782, address 0013.19fa.0a80
Designated port id is 128.1, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 8117315, received 296
Port 2 (FastEthernet0/2) of VLAN0014 is forwarding
Port path cost 19, Port priority 128, Port Identifier 128.2.
Designated root has priority 32782, address 0013.19fa.0a80
Designated bridge has priority 32782, address 0013.19fa.0a80
Designated port id is 128.2, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 1071412, received 11
molod#
Вариант для распечатки
Маршрутизаторы CISCO и др. оборудование. (Public)
on 04-Янв-07, 19:05 
