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December 14th, 2015 11:00

A tale of two switches


At our DR site we have not purchased a Director Class switch for our environment. Instead, we have purchased two pairs(4) of MDS 9148s for our arrays, servers, data domain, etc.

The configuration would be two fabrics, 1 pair for VSAN 100 fabric A, the other pair for VSAN 200 fabric B.

I have DCNM installed and I can see the see pair, 1a, 1b as the fabric(s) defined.

1a, 1b have redundant paths for the VNX, Recover Point and Data domain ports. I would like the 2a/2b side to host the servers that I can zone to the storage array.

My question is can I make the first switch 1a, the principal, and the 2nd (2a) edge the subordinate by creating an ISL link between the two. I would like both switches in the same vsan(1a, 2a, vsan100), 1b,2b(vsan 200).

I have only done this using the core-edge topology so I wasn't sure if I an do this with edge-edge.

Thank you in advance


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20.4K Posts

December 14th, 2015 13:00

copy and paste from the Cisco forum ..or did you post here first ?


why do you care about principal role, if one of the switches fails, that role will be assumed by the other switch in the fabric.

614 Posts

December 15th, 2015 12:00

Thank you Dynamox! I can't remember where I posted this first, but yes, I did a cut and paste!


614 Posts

December 16th, 2015 08:00

So a couple of strange things happened. I created the ISL between the two switches. It came up, however, the new switch thinks it the principal. This looks odd in fabric manager since I downloaded dcnm and made the seed switch the first of each pair since those were the original switches with the zoneset(1a, 1b). Even though I said to enable the full zoneset, and it sees it in the running config when I do a show zoneset, nothing shows up. I see a clear zoneset issued with the running config which is odd. This is also how it looks in DCNM. strange.PNG.png

zoneset distribute full vsan 2

!Active Zone Database Section for vsan 2

zone name RPZONE1 vsan 2

    member pwwn 50:06:01:60:08:60:20:bb

!               [VNX5700DRSPAP0]

    member pwwn 50:01:24:81:00:6c:71:f7

!               [RPA2C1P3]

    member pwwn 50:01:24:81:00:6c:7c:2b

!               [RPA1C1P3]

zone name RPZONE2 vsan 2

    member pwwn 50:06:01:6b:08:60:20:bb

!               [VNX5700DRSPBP3]

    member pwwn 50:01:24:81:00:6c:71:f7

!               [RPA2C1P3]

    member pwwn 50:01:24:81:00:6c:7c:2b

!               [RPA1C1P3]

zone name RPZONE3 vsan 2

    member pwwn 50:06:01:61:08:60:20:bb

!               [VNX5700DRSPAP1]

    member pwwn 50:01:24:81:00:6c:7c:2a

!               [RPA1C1P2]

    member pwwn 50:01:24:81:00:6c:71:f6

!               [RPA2C1P2]

zone name RPZONE4 vsan 2

    member pwwn 50:06:01:6a:08:60:20:bb

!               [VNX5700DRSPBP2]

    member pwwn 50:01:24:81:00:6c:7c:2a

!               [RPA1C1P2]

    member pwwn 50:01:24:81:00:6c:71:f6

!               [RPA2C1P2]

zoneset name DRZONESVSAN2 vsan 2

    member RPZONE1

    member RPZONE2

    member RPZONE3

    member RPZONE4

zoneset activate name DRZONESVSAN2 vsan 2

do clear zone database vsan 2

614 Posts

December 16th, 2015 11:00

Reset the priority so now the right switch is the principal, however, I am still seeing that error in DCNM and the zoneset did not distribute.

614 Posts

December 16th, 2015 11:00

I think I know the issue, the passwords/id is not the same for the two pairs of switches.

Will change it.

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