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01-29-2013 04:37 PM - last edited on 03-25-2015 01:00 AM by Maiko-I
01-29-2013 04:37 PM - last edited on 03-25-2015 01:00 AM by Maiko-I
Alternate ISL with Continuous Access
Hi,
I have two storage P6500 in sites A and B with two fabrics replicating with Continuous Access. This is the topology:
Fabric 1:
(LE E-Port ) <=====================> (LE E-Port)
Switch 1A Switch 1B
Distance ISL = 8 Km
Fabric 2:
(LE E-Port ) <=====================> (LE E-Port)
Switch 2A Switch 2B
Distance ISL = 8 Km
For high availability, I want to add another ISL in fabric 1, on this manner:
(??? E-Port) <=====================> (??? E-Port)
Switch 1A-2 Switch 1B-2
The desired distance for this ISL is 30 km.
My question is:
1. How I configure the port for supporting the 30 km ? Is there a "load balance" in the switch with two ISL on different distances ?
2. Is there a special consideration with the configuration of switch / port if I'm using Continuous Access ?
Please, provide me any clues according your experience.
Thanks in advance.
P.S. This thread ahs been moved from General to Storage Area Networks (SAN) (Enterprise). - Hp Forum moderator
- Tags:
- long distance ISL
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02-01-2013 06:32 AM
02-01-2013 06:32 AM
Re: Alternate ISL with Continuous Access
To load balance between ISLs you would use trunking, there may however be limitations where this won't work if the difference in length/delay is too much. If you have trunking license and the switch allows the two links to be joined in a trunk, it will join them automatically. Restrictions would be in the Fabric OS Admin Guide too.
2.) In CA you get to choose between different replication protocols. That's if you use port-based/exchange-based routing. Another thing to keep in mind is to dedicate links for CA. HP has a "Continuous Access Implementation Guide" and a SAN Design Reference Guide, these may have more information for you too.
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02-17-2013 06:48 PM
02-17-2013 06:48 PM
Re: Alternate ISL with Continuous Access
Hi,
What type of SAN switches are you using? In the case of Brocades, you have to create an ISL trunk using the addiitonal link. Once the trunk is formed, a cost will be assigned to each member in the trunk. The routing protocol routes the packet using the least cost link. Check the licensing requirements for Brocades.
For CISCOs, you have to create a port channel using both ISLs.
You can route the CA traffic through one channel only if you use VSANs/VFabrics and limit that VSAN to the ISL you want to use.
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