Fibre Channel (SAN)

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New Contributor
Posts: 3
Registered: ‎06-27-2015

Host and Storage Connection Issue

We have 2 SAN Fabrics . Each of them have 3 x Brocade 6510 48 port SAN Switches.

 

From every controllers of storages there are 4 or 6 ports connected to one of these switches (central switch). The other 2 switches connected to this central switch with 6 x 8G Trunk ISL Port. All two fabrics have same design.

 

All hosts have dual HBA and one of the ports connected to Fabric A and the other one is connected to Fabric B.

 

There is a simple soft zoning. Server WWN's are put on "Servers" alias and each storage WWN's are put on it's own alias (In example "EMCVNX5400"). Each zone has "Servers" alias and one storage alias like "EMCVNX5400".

 

All hosts running VMware Esxi 5.5. All switches running FOS v7.0.2c .

 

The problem is some of the hosts can see storage LUNs and some of them can't. I am able to send ping from central switches to each WWN of the host which can't see LUNs. I also tried to restart host but not worked.

 

I couldn't find what the problem is. Any opinions?

 

Valued Contributor
Posts: 536
Registered: ‎03-20-2011

Re: Host and Storage Connection Issue

maybe your storage lun mapping does not match the SAN zoning?

New Contributor
Posts: 3
Registered: ‎06-27-2015

Re: Host and Storage Connection Issue

It matches. I also tried to disable all zoning but it doesn't work. 

 

When I connect a host directly to the central switch it works. I checked fabrics again and I couldn't find any problem. It seems issue happens on hosts connected to cascaded switches.

New Contributor
Posts: 3
Registered: ‎06-27-2015

Re: Host and Storage Connection Issue

 

Also I checked fabric,uroute and lsl seems true. Here is it's output below:

 

FabricA:

 

NSmasterUst:FID128:root> fabricshow 

Switch ID   Worldwide Name           Enet IP Addr    FC IP Addr      Name

-------------------------------------------------------------------------

  1: fffc01 10:00:50:eb:1a:42:6c:c4 10.9.68.21      0.0.0.0        >"NSmasterUst"

  3: fffc03 10:00:50:eb:1a:42:6d:f4 10.9.68.23      0.0.0.0         "NSdort"

  5: fffc05 10:00:50:eb:1a:42:21:d0 10.9.68.25      0.0.0.0         "NSiki"

 

The Fabric has 3 switches

Fabric Name: NS1

 

NSmasterUst:FID128:root> urouteshow 

 

Local Domain ID: 1

 

In Port    Domain    Out Port    Metric    Hops    Flags    Next (Dom, Port)

----------------------------------------------------------------------------

   0          3          1         500       1       D            3,25

              5         45         500       1       D            5,27

 

NSmasterUst:FID128:root> islshow 

  1:  1-> 25 10:00:50:eb:1a:42:6d:f4   3 NSdort          sp:  8.000G bw: 48.000G TRUNK CR_RECOV 

  2: 45-> 27 10:00:50:eb:1a:42:21:d0   5 NSiki           sp:  8.000G bw: 48.000G TRUNK CR_RECOV 

 

 

FabricB:

 

NSmasterAlt:FID128:root> fabricshow 

Switch ID   Worldwide Name           Enet IP Addr    FC IP Addr      Name

-------------------------------------------------------------------------

  2: fffc02 10:00:50:eb:1a:42:7f:24 10.9.68.22      0.0.0.0        >"NSmasterAlt"

  4: fffc04 10:00:50:eb:1a:42:95:10 10.9.68.24      0.0.0.0         "NSuc"

  6: fffc06 10:00:50:eb:1a:42:8c:7c 10.9.68.26      0.0.0.0         "NSbir"

 

The Fabric has 3 switches

Fabric Name: NS1

 

NSmasterAlt:FID128:root> urouteshow 

 

Local Domain ID: 2

 

In Port    Domain    Out Port    Metric    Hops    Flags    Next (Dom, Port)

----------------------------------------------------------------------------

   0          4          1         500       1       D            4,24

              6         46         500       1       D            6,29

NSmasterAlt:FID128:root> islshow 

  1:  1-> 24 10:00:50:eb:1a:42:95:10   4 NSuc            sp:  8.000G bw: 48.000G TRUNK CR_RECOV 

  2: 46-> 29 10:00:50:eb:1a:42:8c:7c   6 NSbir           sp:  8.000G bw: 48.000G TRUNK CR_RECOV 

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