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31 Posts
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1467
Removing ISL's between 4800 and DCX's
Hi Guys,
Please see the fabric below
1: fffc01 10:00:00:05:1e:04:c5:c2 10.18.5.27 0.0.0.0 >"PSAN_A"
2: fffc02 50:00:51:e3:93:90:fe:0e 0.0.0.0 0.0.0.0 "fcr_fd_2"
3: fffc03 50:00:51:e3:93:8e:ff:14 0.0.0.0 0.0.0.0 "fcr_xd_3_16"
4: fffc04 50:00:51:e3:9b:b0:af:15 0.0.0.0 0.0.0.0 "fcr_xd_4_10"
5: fffc05 50:00:51:e3:93:8e:ff:10 0.0.0.0 0.0.0.0 "fcr_xd_5_11"
6: fffc06 10:00:00:05:1e:04:ce:8e 10.18.6.80 0.0.0.0 "PSAN_A_1"
7: fffc07 10:00:00:05:1e:09:e2:f2 10.17.224.20 0.0.0.0 "10_TAPE"
10: fffc0a 10:00:00:05:1e:e7:9f:cd 10.18.104.58 0.0.0.0 "P_5300_A"
12: fffc0c 10:00:00:05:1e:a7:4a:e4 10.18.14.60 0.0.0.0 "5300_1_A"
14: fffc0e 10:00:00:05:1e:e5:71:00 10.18.126.163 0.0.0.0 "DCX_1_A"
25: fffc19 10:00:00:05:33:85:c7:00 10.18.15.4 0.0.0.0 "DCX_A_2"
160: fffca0 50:00:51:e3:9b:b2:ae:0e 0.0.0.0 0.0.0.0 "fd_160"
we have migrated all the cables off of PSAN_A & PSAN_A_1. Now want to remove 2 switches off of the fabric.
In such a case if the cables are disconnected which switch would become the principle switch?
Will The fabric be segmented since PSAN_A is the priciple switch which switch will become the principle switch? Will zoning be effected?
The switches DCX_1_A and DCX_1_2 are DCX's and all the cables have been moved to DCX_1_A then will it become a principle switch?
5300_1_A is having ISL to PSAN_A and we are looking to move it to DCX_1_A.
The proposed solution is to lay a new cable from DCX_1_A to 5300_1_A and then go ahead with disconnecting from PSAN_A.
Will this cause the fabric to go segmented? Will 5300_1_A become the principle switch?
-Thanks in Advance
felipon1
96 Posts
0
December 4th, 2012 01:00
Hi,
In response to your questions:
Assuming that the priority is the same for all the fabric members, 10_TAPE has the lowest WWN and will become Principal once PSAN_A_1 and PSAN_A are removed
Theoretically, a Build Fabric process is online fabricwise and zoning should not be affected.
Unless you force it to be principal, it won't.
Traffic should not be segmented and no, 5300_1_A won't become Principal by default.
Once said this, I recommend you to, prior to removing any cable, change the Principal switch. I would make a DCX to be the principal. The procedure is simple (and non-disruptive):
Once you've established a new Principal switch non-disruptively, you should not have any problems removing those switchs.
Rgds,
Felipon
tech511
31 Posts
0
January 7th, 2013 11:00
Thanks a Lot Felipon.
One question ,when enabling principal switch priority should I do this by logging into respective switches and set the priorities individually.
tech511
31 Posts
0
January 7th, 2013 11:00
Also what do you mean by Fabric rebuild and is this disruptive?
felipon1
96 Posts
0
January 9th, 2013 02:00
Build Fabric is the Fibre Channel process defined in the standar that is used to non-disruptively (at least in theory) select the Principal Switch. I recommend you to change the Principal switch in a low activity window.
Rgds
felipon1
96 Posts
0
January 9th, 2013 02:00
Hi,
Yes, you have to connect to the switch you want to make principal, increase its priority and force a Build Fabric. This all is done by running the command:
fabricprincipal --enable -force