Hi All ,
I have got 2 UD switch block ( Multilayer switch 0 , Multilayer switch 1 ) , Access layer switch 2950 24 port switch which is operated for 2 different floor ( Access layer 2950 sw1 at Frist floor & Access layer 2950 Sw2 at 2nd floor ) ,
ML SW 1 to AL SW 1 --> Fa0/1 --> Fa0/1
ML SW 1 to AL SW 2 --> Fa 0/2 --> Fa0/1
ML Sw 2 to AL SW 1 --> Fa0/1-- > Fa0/2
ML SW 2 toAL Sw 2 --> Fa0/2 --> Fa 0/2
My all switch operating r running in VTP transparent mode , My network is operating with 3 vlan
Vlan 10 : support : 30 user
Vlan 20 : development : 18 user
Vlan 30 : Network management
trunking between both Multilayer switch allow only VLAN 30
But my objective is to have both uplink connecting to Multilayer switch from access layer sw should be in forwarding state ,
For eg Vlan 20 has 18 user , so i am keeping AL 2950 Sw2 as root bridge , so my both uplink is in forwarding state
VLAN0020
Spanning tree enabled protocol ieee
Root ID Priority 24596
Address 000D.BD10.A8E9
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 24596 (priority 24576 sys-id-ext 20)
Address 000D.BD10.A8E9
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/1 Desg FWD 19 128.1 P2p
Fa0/2 Desg FWD 19 128.2 P2p
But for Vlan 10 has 30 user , I am keeping al 2950 Sw1 as root bridge , in AL SW 1 both uplink or in forwarding state , but in AL Sw2 port connecting to ML SW1 is in forwarding state , port connecting to ML sw2 is blocking state
alsw2#sh spanning-tree
VLAN0010
Spanning tree enabled protocol ieee
Root ID Priority 24586
Address 0001.636D.8A6A
Cost 19
Port 1(FastEthernet0/1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 24586 (priority 24576 sys-id-ext 10)
Address 000D.BD10.A8E9
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/1 Root FWD 19 128.1 P2p
Fa0/2 Altn BLK 19 128.2 P2p
I have HSRP priority high for VLan 10 on ML Sw2 , and for Van 20 ML sw1 is high , If my access layer switch2 port fa0/2 is in blocking mode , my end user may nt get connected to Ml Sw2 due trunk port is in blocking mode ,
Suggest me good STP design on this scenario ....
Else i want to use my ML SW 1 or SW 2 as root bridge for both VLAN ,
or else trunk port connecting between ML SW 1 & ML SW 2 should permit vlan 10 , 20 along with vlan 30 ..
