Добрый день.
Столкнулся с еще одной проблемой
Имеем 2 DES-6500:

№1
DES-6500:4#show switch
Command: show switch

Device Type : DES-6500 Chassis Ethernet Switch
MAC Address : 00-11-95-B2-88-00
IP Address : 10.0.0.2 (Manual)
VLAN Name : default
Subnet Mask : 255.255.252.0
Default Gateway : 10.0.0.1
Boot PROM Version : Build 2.00-B20
Firmware Version : Build 3.50-B11
Hardware Version : 3A1
System Name : Gate1
System Location :
System Contact :
Spanning Tree : Enabled
GVRP : Enabled
IGMP Snooping : Enabled
802.1x : Disabled
Jumbo Frame : Off
Clipaging : Enabled
Port Mirror : Disabled
SNTP : Enabled
DHCP Relay : Disabled
DNSR Status : Disabled
VRRP : Disabled
DVMRP : Enabled
PIM : Disabled
RIP : Disabled
OSPF : Enabled
TELNET : Disabled
WEB : Disabled
RMON : Disabled
HOL Prevention State : Enabled
Syslog Global State : Disabled

DES-6500:4#show stack_information
Command: show stack_information

Box Prio- Prom Runtime H/W
ID Type Exist rity version version version
--- ----------- ----- ----- -------- -------- --------
1 DES-6509 exist 16 2.00-B20 3.50-B11 3A1
2 DES-6509 exist 16 0.00-B16 3.50-B11 3A1
3 DES-6509 exist 16 0.00-B16 3.50-B11 3A1
4 DES-6509 no
5 DES-6509 exist 16 2.00-B20 3.50-B11 3A1
6 DES-6507 no
7 DES-6507 no
8 DES-6507 exist 16 2.00-B20 3.50-B11 3A1
-----------------------------------------------------------------
Topology :STAR
Current state:MASTER
Box Count :5

№2
DES-6500:4#show switch
Command: show switch

Device Type : DES-6500 Chassis Ethernet Switch
MAC Address : 00-11-95-B2-65-00
IP Address : 10.0.0.3 (Manual)
VLAN Name : default
Subnet Mask : 255.255.252.0
Default Gateway : 0.0.0.0
Boot PROM Version : Build 2.00-B20
Firmware Version : Build 3.50-B11
Hardware Version : 3A1
System Name :
System Location :
System Contact :
Spanning Tree : Enabled
GVRP : Disabled
IGMP Snooping : Enabled
802.1x : Disabled
Jumbo Frame : Off
Clipaging : Enabled
Port Mirror : Disabled
SNTP : Enabled
DHCP Relay : Disabled
DNSR Status : Disabled
VRRP : Disabled
DVMRP : Enabled
PIM : Disabled
RIP : Disabled
OSPF : Enabled
TELNET : Disabled
WEB : Enabled (TCP 80)
RMON : Disabled
HOL Prevention State : Enabled
Syslog Global State : Disabled

DES-6500:4#show stack_information
Command: show stack_information

Box Prio- Prom Runtime H/W
ID Type Exist rity version version version
--- ----------- ----- ----- -------- -------- --------
1 DES-6509 exist 16 0.00-B16 3.50-B11 3A1
2 DES-6509 exist 16 0.00-B16 3.50-B11 3A1
3 DES-6509 exist 16 0.00-B16 3.50-B11 3A1
4 DES-6509 exist 16 0.00-B16 3.50-B11 3A1
5 DES-6507 no
6 DES-6507 no
7 DES-6507 no
8 DES-6507 no
-----------------------------------------------------------------
Topology :STAR
Current state:MASTER
Box Count :4

вырезки из конфига свича №1
# STP

config stp version mstp
config stp maxage 20 maxhops 20 forwarddelay 15 txholdcount 3 fbpdu enable lbd enable lbd_recover_timer 60
config stp priority 4096 instance_id 0
create stp instance_id 1
config stp instance_id 1 add_vlan 1
config stp priority 4096 instance_id 1
config stp mst_config_id name atcom revision_level 1
enable stp
config stp ports 1:1-1:12 hellotime 2
config stp mst_ports 1:1-1:12 instance_id 0 internalCost auto priority 128
config stp ports 1:1-1:12 externalCost auto edge true p2p auto state disable lbd disable
config stp mst_ports 1:1-1:12 instance_id 1 internalCost auto priority 128
config stp ports 2:1-2:12 hellotime 2
config stp mst_ports 2:1-2:12 instance_id 0 internalCost auto priority 128
config stp ports 2:1-2:12 externalCost auto edge true p2p auto state disable lbd disable
config stp mst_ports 2:1-2:12 instance_id 1 internalCost auto priority 128
config stp ports 3:1-3:12 hellotime 2
config stp mst_ports 3:1-3:12 instance_id 0 internalCost auto priority 128
config stp ports 3:1-3:12 externalCost auto edge true p2p auto state disable lbd disable
config stp mst_ports 3:1-3:12 instance_id 1 internalCost auto priority 128
config stp ports 4:1-4:12 hellotime 2
config stp mst_ports 4:1-4:12 instance_id 0 internalCost auto priority 128
config stp ports 4:1-4:12 externalCost auto edge true p2p auto state disable lbd disable
config stp mst_ports 4:1-4:12 instance_id 1 internalCost auto priority 128
config stp ports 5:1,5:3-5:12 externalCost auto edge true p2p auto state disable lbd disable
config stp ports 5:1-5:12 hellotime 2
config stp mst_ports 5:1-5:12 instance_id 0 internalCost auto priority 128
config stp ports 5:2 externalCost auto edge false p2p auto state enable lbd disable
config stp mst_ports 5:1,5:3-5:12 instance_id 1 internalCost auto priority 128
config stp mst_ports 5:2 instance_id 1 internalCost 20000 priority 96
config stp ports 6:1-6:12 externalCost auto edge true p2p auto state disable lbd disable
config stp ports 6:1-6:12 hellotime 2
config stp mst_ports 6:1-6:12 instance_id 0 internalCost auto priority 128
config stp mst_ports 6:1-6:12 instance_id 1 internalCost auto priority 128
config stp ports 7:1-7:12 externalCost auto edge true p2p auto state disable lbd disable
config stp ports 7:1-7:12 hellotime 2
config stp mst_ports 7:1-7:12 instance_id 0 internalCost auto priority 128
config stp mst_ports 7:1-7:12 instance_id 1 internalCost auto priority 128
config stp ports 8:1-8:12 externalCost auto edge true p2p auto state disable lbd disable
config stp ports 8:1-8:12 hellotime 2
config stp mst_ports 8:1-8:12 instance_id 0 internalCost auto priority 128
config stp mst_ports 8:1-8:12 instance_id 1 internalCost auto priority 128


вырезки из конфига свича №2

# STP

config stp version mstp
config stp maxage 20 maxhops 20 forwarddelay 15 txholdcount 3 fbpdu enable lbd enable lbd_recover_timer 60
config stp priority 32768 instance_id 0
create stp instance_id 1
config stp instance_id 1 add_vlan 1
config stp priority 32768 instance_id 1
config stp mst_config_id name atcom revision_level 1
enable stp
config stp ports 1:1 externalCost auto edge false p2p auto state enable lbd disable
config stp ports 1:1-1:12 hellotime 2
config stp mst_ports 1:1-1:12 instance_id 0 internalCost auto priority 128
config stp ports 1:2-1:12 externalCost auto edge true p2p auto state disable lbd disable
config stp mst_ports 1:1-1:12 instance_id 1 internalCost auto priority 128
config stp ports 2:1-2:12 hellotime 2
config stp mst_ports 2:1-2:12 instance_id 0 internalCost auto priority 128
config stp ports 2:1-2:12 externalCost auto edge true p2p auto state disable lbd disable
config stp mst_ports 2:1-2:12 instance_id 1 internalCost auto priority 128
config stp ports 3:1-3:12 hellotime 2
config stp mst_ports 3:1-3:12 instance_id 0 internalCost auto priority 128
config stp ports 3:1-3:12 externalCost auto edge true p2p auto state disable lbd disable
config stp mst_ports 3:1-3:12 instance_id 1 internalCost auto priority 128
config stp ports 4:1-4:12 hellotime 2
config stp mst_ports 4:1-4:12 instance_id 0 internalCost auto priority 128
config stp ports 4:1-4:12 externalCost auto edge true p2p auto state disable lbd disable
config stp mst_ports 4:1-4:12 instance_id 1 internalCost auto priority 128
config stp ports 5:1-5:12 hellotime 2
config stp mst_ports 5:1-5:12 instance_id 0 internalCost auto priority 128
config stp ports 5:1-5:12 externalCost auto edge true p2p auto state disable lbd disable
config stp mst_ports 5:1-5:12 instance_id 1 internalCost auto priority 128
config stp ports 6:1-6:12 hellotime 2
config stp mst_ports 6:1-6:12 instance_id 0 internalCost auto priority 128
config stp ports 6:1-6:12 externalCost auto edge true p2p auto state disable lbd disable
config stp mst_ports 6:1-6:12 instance_id 1 internalCost auto priority 128
config stp ports 7:1-7:12 hellotime 2
config stp mst_ports 7:1-7:12 instance_id 0 internalCost auto priority 128
config stp ports 7:1-7:12 externalCost auto edge true p2p auto state disable lbd disable
config stp mst_ports 7:1-7:12 instance_id 1 internalCost auto priority 128
config stp ports 8:1-8:12 hellotime 2
config stp mst_ports 8:1-8:12 instance_id 0 internalCost auto priority 128
config stp ports 8:1-8:12 externalCost auto edge true p2p auto state disable lbd disable
config stp mst_ports 8:1-8:12 instance_id 1 internalCost auto priority 128



порт 5:2 первого коммутатора воткнут в порт 1:1 второго коммутатора

в итоге получаем
с коммутатора №1
#show stp instance_id 1
Command: show stp instance_id 1

STP Instance Settings
---------------------------
Instance Type : MSTI(1)
Instance Status : Enabled
Instance Priority : 4097 (bridge priority : 4096 , sys ID ext : 1 )

STP Instance Operational Status
--------------------------------
Regional Root Bridge : 4097 /00-11-95-B2-88-00
Internal Root Cost : 0
Designated Bridge : 4097 /00-11-95-B2-88-00
Root Port : None
Remaining Hops : 20
Last Topology Change : 4559
Topology Changes Count : 35

с коммутатора №2
#show stp instance_id 1
Command: show stp instance_id 1

STP Instance Settings
---------------------------
Instance Type : MSTI(1)
Instance Status : Enabled
Instance Priority : 32769(bridge priority : 32768, sys ID ext : 1 )

STP Instance Operational Status
--------------------------------
Regional Root Bridge : 32769/00-11-95-B2-65-00
Internal Root Cost : 0
Designated Bridge : 32769/00-11-95-B2-65-00
Root Port : None
Remaining Hops : 20
Last Topology Change : 4552
Topology Changes Count : 32

т.е. каждый коммутатор считает спебя корневым
при включении второго линка получаем кольцо со всеми вытекающими...

собственно вопрос: что я делаю не так?
Пните в нужном направлении...

Эту ситуацию разбирает Руслан Бигаров.

Рекомендации помогли?

_________________
С уважением,
Бигаров Руслан.