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ProCurve 2824 Failover Help
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11-13-2007 04:06 AM
11-13-2007 04:06 AM
ProCurve 2824 Failover Help
ProCurve 2824 Failover Help
I am trying to configure three Procurve 2824s in a failover mesh-like topology but have come unstuck.
Each switch has 3 VLANs set up, one for our SAN (VLAN 2), one for VMWare VMotion traffic (VLAN 3) and the default (VLAN 1). Two of the switches connect to the third using fibre links from each of the SAN and VMotion VLANs. This gives a triangle with no bottom shaped topology.
What I'd like to do is connect the two bottom switches together to provide failover, however, I'd like to keep the traffic physically separate as per the enclosed diagram. This would mean connections between the SAN and VMotion VLANs.
I have tried enabling spanning tree on the switches but this did not work quite as I'd liked - the VMotion network was cut of completely. What do I need to do to give me the failover I want? Any help would be most appreciated.
Chris
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11-13-2007 06:52 PM
11-13-2007 06:52 PM
Re: ProCurve 2824 Failover Help
Re: ProCurve 2824 Failover Help
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11-13-2007 07:58 PM
11-13-2007 07:58 PM
Re: ProCurve 2824 Failover Help
Re: ProCurve 2824 Failover Help
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11-13-2007 08:22 PM
11-13-2007 08:22 PM
Re: ProCurve 2824 Failover Help
Re: ProCurve 2824 Failover Help
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11-13-2007 08:43 PM
11-13-2007 08:43 PM
Re: ProCurve 2824 Failover Help
Re: ProCurve 2824 Failover Help
With 3 VLANs and 3 switches, First tag all VLANs on all switch-to-switch links. (You would do this with RSTP too).
Next create 3 MSTP instances, instance 1 for VLAN 1, instance 2 for VLAN 2, instance 3 for VLAN 3.
Finally, set the instance priorities. For example, switch-1 I would make the root for instance 1, switch-2 root for instance 2 and switch 3 root for instance 3.
This will give you the type of failover you're after, and will also better utilisation of blocked links.
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11-13-2007 08:56 PM
11-13-2007 08:56 PM
Re: ProCurve 2824 Failover Help
Re: ProCurve 2824 Failover Help
I'm afraid that my switch config skills are weak at best - what commands are required to set up MSTP instances and such?
How would you recommend connecting switch 1 and switch 2 - using another 2 gig trunk (HP trunk not Cisco trunk) with the VLAN tagging?
Many thanks.
Chris
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11-13-2007 09:28 PM
11-13-2007 09:28 PM
Re: ProCurve 2824 Failover Help
Re: ProCurve 2824 Failover Help
> OK, so what you're saying is that I can't
> keep the traffic physically separate on the
> switch-to-switch links?
Of course you could. It's just that in normal situations, you don't have the infrastructure (fibres) to do this, and it will not scale when more VLANs are added. However, doing it for some dedicated VLANs will work. Just make the ports at each end untagged in the relevant VLAN and connect them.
In theory, that's it. In practice, you don't have per-VLAN Spanning Tree on ProCurves, so building such structures can have surprising consequences to your STP topology. So I second the proposal to have this set up with MSTP, even though configuring MSTP is a PITA.
HTH,
Andre.
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11-13-2007 09:45 PM
11-13-2007 09:45 PM
Re: ProCurve 2824 Failover Help
Re: ProCurve 2824 Failover Help
How's this?
- Create (HP) trunks between switch 1 and switch 3 plus between switch 2 and switch 3.
- Add VLAN tagging to the trunks.
- Configure the MSTP instances and such (I could do with some pointers on how do so this please).
- Connect switch 1 and switch 2 with an additional (HP) trunk and add the VLAN tagging.
When I say (HP) trunk I mean more than one connection working together like Cisco etherchannel.
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