• How to check the link connectivity between a host and storage on SAN switches.
• How to do a health check on Brocade and Cisco SAN switches.

      In a SAN fabric, a SAN switch is to make the zone members normally communicate with each other, and to provide a stable link at the fibre channel‘s FC-4 layer. To check the link connectivity on SAN switches, you should do the following tasks:

1.     Check the physical links

      Check if the port is online, the port speed is correct, and the device type is FC_SW/FC_AL.

·         Brocade

switchshow

switchshow        :

CURRENT CONTEXT -- 0 , 128

switchName:      SW_xxx

switchType:        62.3

switchState:        Online  

switchMode:      Native

switchRole:         Subordinate

switchDomain:   100

switchId:              fffc64

switchWwn:        10:xx:xx:xx:xx:xx:xx:xx

zoning:                 ON (Zone_xxx)

switchBeacon:   OFF

FC Router:           OFF

Allow XISL Use:  OFF

LS Attributes:      [FID: 128, Base Switch: No, Default Switch: Yes, Address Mode 0]

Index Slot Port Address Media Speed State     Proto

===================================================

  0    1    0   640000   id    N2   Online      FC  F-Port  21:00:00:xx:xx:xx:xx:xx

  1    1    1   640100  id    N2   Online      FC  F-Port  10:00:00:xx:xx:xx:xx:xx

·         Cisco

show interface brief

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

Interface  Vsan   Admin  Admin   Status          SFP    Oper  Oper   Port

                  Mode   Trunk                          Mode  Speed  Channel

                         Mode                                 (Gbps)

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

fc1/1      4      FX     off     up               swl    F       4    --

fc1/2      4      FX     off     up               swl    F       4    --

fc1/3      4      FX     off     up               swl    F       4    --

fc1/4      4      FX     off     up               swl    F       4    --

fc1/5      4      FX     off     up               swl    F       4    --

fc1/6      3      FX     off     up               swl    F       4    --

2.     Check device FLOGI, PLOGI login

      Check if the devices FLOGI/PLOGI login normally and are successfully registered in Name Server.

·         Brocade

nsshow

/fabos/cliexec/nsshow -r

{

Type Pid    COS     PortName                NodeName                 SCR

N    151100;      3;21:00:00:xx:xx:xx:xx:xx;20:00:00:xx:xx:xx:xx:xx; 3

    FC4s: FCP

    NodeSymb: [43] "QEM3572 FW:v5.03.01 DVR:v8.03.01.12.10.3-k4"

    Fabric Port Name: 20:03:00:xx:xx:xx:xx:xx

    Permanent Port Name: 21:00:00:xx:xx:xx:xx:xx

    Port Index: 3

    Share Area: No

    Device Shared in Other AD: No

    Redirect: No

·         Cisco

o   Check FLOGI

show flogi database

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

INTERFACE        VSAN    FCID           PORT NAME               NODE NAME      

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

fc1/1            4     0x0d0104  50:06:04:xx:xx:xx:xx:xx 50:06:04:xx:xx:xx:xx:xx

fc1/2            4     0x0d0100  50:06:04:xx:xx:xx:xx:xx 50:06:04:xx:xx:xx:xx:xx

fc1/3            4     0x0d0101  50:06:04:xx:xx:xx:xx:xx 50:06:04:xx:xx:xx:xx:xx

o   Check PLOGI

show fcns database vsan 1-4093

VSAN 3:

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

FCID        TYPE  PWWN                    (VENDOR)        FC4-TYPE:FEATURE

0x0c0000    N     50:06:04:xx:xx:xx:xx:xx (EMC)           scsi-fcp 253

3.     Check zone settings

      Check host and storage are in the same zone. The zone is activated.

·         Brocade

cfgshow

/fabos/cliexec/cfgshow:

Defined configuration:

. . .

Effective configuration:

cfg:   KH_cfg

zone:  zone_test

                21:00:00:24:xx:xx:xx:xx

                50:06:01:61:xx:xx:xx:xx

·         Cisco

show zoneset active vsan 1-4093

zoneset name Test_CFG vsan 3

  zone name Test_zone vsan 3

     interface fc1/7 swwn 20:00:00:xx:xx:xx:xx:xx

  * fcid 0x0c0000 [interface fc1/6 swwn 20:00:00:xx:xx:xx:xx:xx]

      If the switch passes the above check items, then the link between host and storage is normal.

                                                                                                               Author: Roger

             

iEMC APJ

Please click here for for all contents shared by us.