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тАО11-05-2010 04:24 AM
тАО11-05-2010 04:24 AM
Hi,
i've got a Problem get MSTP to work like i want.
My Situation:
I've two 2810-24G Switches. And between this switches 2 microwave radio relay links. And there are 2 Vlans that should be transfered over the microwave radio relay. Each Vlan over an own Link
2 Links
Link1 Vlan1 & Backup for Vlan 2
2810============================= 2810
Link2 Vlan2 & Backup for Vlan1
Now my Problem:
I've configured on both Switches 2 vlans ID: 1,2. On both switches i set 2 Ports to "Tagged" ( 13 + 15 ) and connect the two Ports.
i also configured the MSTP:
on Switch 1
spanning-tree config-name RiFu
spanning-tree config-revision 1
spanning-tree instance 1 vlan 1
spanning-tree instance 2 vlan 2
(enabling spanning-tree)
spanning-tree instance 1 priority 1
spanning-tree instance 2 priority 0
spanning-tree priority 1
on Switch 2
spanning-tree config-name RiFu
spanning-tree config-revision 1
spanning-tree instance 1 vlan 1
spanning-tree instance 2 vlan 2
(enabling spanning-tree)
spanning-tree instance 1 priority 0
spanning-tree instance 2 priority 1
spanning-tree priority 0
When i Connect the 2 Links (Ports 13+15) the MSTP begin to Act and enabling the connection between the Switches. And after a few seconds the Link becomes active and I can Ping the other Side.
But both Vlans connecting over the same Link (Link 1 Port 13), what I want is that each Vlan connect over another Link.
Vlan 1 over port 13 Link 1
Vlan 2 over port 15 Link 2
How can I tell the Instance 1 to use Port 13 and Instance 2 to use Port 15 ?
Now this Forum is my last chance. I try to get the two Switches to work since 2 days now.
Thanks a lot.
B.Bechtold
i've got a Problem get MSTP to work like i want.
My Situation:
I've two 2810-24G Switches. And between this switches 2 microwave radio relay links. And there are 2 Vlans that should be transfered over the microwave radio relay. Each Vlan over an own Link
2 Links
Link1 Vlan1 & Backup for Vlan 2
2810============================= 2810
Link2 Vlan2 & Backup for Vlan1
Now my Problem:
I've configured on both Switches 2 vlans ID: 1,2. On both switches i set 2 Ports to "Tagged" ( 13 + 15 ) and connect the two Ports.
i also configured the MSTP:
on Switch 1
spanning-tree config-name RiFu
spanning-tree config-revision 1
spanning-tree instance 1 vlan 1
spanning-tree instance 2 vlan 2
(enabling spanning-tree)
spanning-tree instance 1 priority 1
spanning-tree instance 2 priority 0
spanning-tree priority 1
on Switch 2
spanning-tree config-name RiFu
spanning-tree config-revision 1
spanning-tree instance 1 vlan 1
spanning-tree instance 2 vlan 2
(enabling spanning-tree)
spanning-tree instance 1 priority 0
spanning-tree instance 2 priority 1
spanning-tree priority 0
When i Connect the 2 Links (Ports 13+15) the MSTP begin to Act and enabling the connection between the Switches. And after a few seconds the Link becomes active and I can Ping the other Side.
But both Vlans connecting over the same Link (Link 1 Port 13), what I want is that each Vlan connect over another Link.
Vlan 1 over port 13 Link 1
Vlan 2 over port 15 Link 2
How can I tell the Instance 1 to use Port 13 and Instance 2 to use Port 15 ?
Now this Forum is my last chance. I try to get the two Switches to work since 2 days now.
Thanks a lot.
B.Bechtold
Solved! Go to Solution.
3 REPLIES 3
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тАО11-05-2010 05:21 AM
тАО11-05-2010 05:21 AM
Solution
Hello Bj├Г┬╢rn,
basically you have the following options:
1) Assign different cost values for each instance. i.e. try to make the redundant path worse than the primary:
if the normal path cost is 20000 (for a gigabit link), then assign let's say 21000 to the second link:
spanning-tree instance 1 13 path-cost 21000
spanning-tree instance 2 15 path-cost 21000
2) Set up a LACP Trunk between the two switches by aggregating port 13 and 15 to a logical trunk interface. Then the trunking process will take about load balancing.
On both ends you need the following config:
trunk trk1 13,15 LACP
vlan 1
tagged trk1
vlan 2
tagged trk2
Cheers,
Michael
basically you have the following options:
1) Assign different cost values for each instance. i.e. try to make the redundant path worse than the primary:
if the normal path cost is 20000 (for a gigabit link), then assign let's say 21000 to the second link:
spanning-tree instance 1 13 path-cost 21000
spanning-tree instance 2 15 path-cost 21000
2) Set up a LACP Trunk between the two switches by aggregating port 13 and 15 to a logical trunk interface. Then the trunking process will take about load balancing.
On both ends you need the following config:
trunk trk1 13,15 LACP
vlan 1
tagged trk1
vlan 2
tagged trk2
Cheers,
Michael
Ingentive Networks GmbH
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тАО11-05-2010 05:54 AM
тАО11-05-2010 05:54 AM
Re: MSTP - 2 Links between 2 2810
Hi Michael,
Thank you for your quick answer.
I Will test your first option with the Path costs
sadly your second Option is not acceptable because the two links / Vlans belongs to two different Companys which would have both their dedicated Link.
This was also my first idea. But when i simply trunk the two links no Company has ists "own" link.
I will test ...
Thanks
Bjoern
Thank you for your quick answer.
I Will test your first option with the Path costs
sadly your second Option is not acceptable because the two links / Vlans belongs to two different Companys which would have both their dedicated Link.
This was also my first idea. But when i simply trunk the two links no Company has ists "own" link.
I will test ...
Thanks
Bjoern
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тАО11-05-2010 07:56 AM
тАО11-05-2010 07:56 AM
Re: MSTP - 2 Links between 2 2810
Hi Michael,
Thank You very much for your Help.
The Option to set the Path Cost was the solution.
on Switch 1
spanning-tree instance 1 13 path-cost 21000
On Switch 2
spanning-tree instance 2 15 path-cost 21000
Now the 2 MSTP-Links are on 2 physical Ports 13 & 15.
The Failover Function is already working. When one Link crashes down MSTP is switching over to the active Link.
Thanks
Bj├Г┬╢rn
Thank You very much for your Help.
The Option to set the Path Cost was the solution.
on Switch 1
spanning-tree instance 1 13 path-cost 21000
On Switch 2
spanning-tree instance 2 15 path-cost 21000
Now the 2 MSTP-Links are on 2 physical Ports 13 & 15.
The Failover Function is already working. When one Link crashes down MSTP is switching over to the active Link.
Thanks
Bj├Г┬╢rn
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