Fibre Channel (SAN)

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New Contributor
Posts: 4
Registered: ‎12-21-2011

Port Flapping problem

Hello Dear,

I would apppriciate if you could help me,

We have a mixed VSphere 5 and Hyper-V SAN environment with two IBM 2498 (Brocade 300) SAN switches + HDS AMS2100

I think the zoning and LUN masking is correct.

There are problems only with the VShphere hosts in the environment. Hyper-V works well.

VSphere hosts are two IBM machines (with QLA2462 2 ports 4Gb FC cards).

Sometimes there are port flapping between the ESX hosts' ports and the SAN switches' ports, and then we lose the SAN volume. We changed SFPs and FC cables already, but the problem  is same.

Please find below  the output of fabriclog -s command:

The switches fw are 6.1.0c and 6.2.1a.

Do you have any idea?

Thank you in advance,

Peter

07:32:10.263 SCN Port Offline;g=0x1c72                   D2,P0  D2,P0  8     NA   
07:32:10.263 *Removing all nodes from port               D2,P0  D2,P0  8     NA   
07:32:41.796 SCN LR_PORT (0);g=0x1c72                    D2,P0  D2,P0  8     NA   
07:32:41.803 SCN Port Online;g=0x1c72                    D2,P0  D2,P1  8     NA   
07:32:41.803 Port Elp engaged                            D2,P1  D2,P0  8     NA   
07:32:41.803 SCN Port F_PORT                             D2,P1  D2,P0  8     NA   
07:32:41.803 *Removing all nodes from port               D2,P0  D2,P0  8     NA   
07:33:23.049 SCN Port Offline;g=0x1c74                   D2,P0  D2,P0  8     NA   
07:33:23.049 *Removing all nodes from port               D2,P0  D2,P0  8     NA   
07:33:54.843 SCN LR_PORT (0);g=0x1c74                    D2,P0  D2,P0  8     NA   
07:33:54.850 SCN Port Online;g=0x1c74                    D2,P0  D2,P1  8     NA   
07:33:54.850 Port Elp engaged                            D2,P1  D2,P0  8     NA   
07:33:54.850 SCN Port F_PORT                             D2,P1  D2,P0  8     NA   
07:33:54.850 *Removing all nodes from port               D2,P0  D2,P0  8     NA   
07:34:36.081 SCN Port Offline;g=0x1c76                   D2,P0  D2,P0  8     NA   
07:34:36.081 *Removing all nodes from port               D2,P0  D2,P0  8     NA   
07:35:07.907 SCN LR_PORT (0);g=0x1c76                    D2,P0  D2,P0  8     NA   
07:35:07.910 SCN Port Online;g=0x1c76                    D2,P0  D2,P1  8     NA   
07:35:07.910 Port Elp engaged                            D2,P1  D2,P0  8     NA   
07:35:07.910 SCN Port F_PORT                             D2,P1  D2,P0  8     NA   
07:35:07.910 *Removing all nodes from port               D2,P0  D2,P0  8     NA   
07:35:49.129 SCN Port Offline;g=0x1c78                   D2,P0  D2,P0  8     NA   
07:35:49.129 *Removing all nodes from port               D2,P0  D2,P0  8     NA   
07:36:20.978 SCN LR_PORT (0);g=0x1c78                    D2,P0  D2,P0  8     NA   
07:36:20.985 SCN Port Online;g=0x1c78                    D2,P0  D2,P1  8     NA   
07:36:20.985 Port Elp engaged                            D2,P1  D2,P0  8     NA   
07:36:20.985 SCN Port F_PORT                             D2,P1  D2,P0  8     NA   
07:36:20.985 *Removing all nodes from port               D2,P0  D2,P0  8     NA   
07:37:02.190 SCN Port Offline;g=0x1c7a                   D2,P0  D2,P0  8     NA   
07:37:02.190 *Removing all nodes from port               D2,P0  D2,P0  8     NA   
07:37:34.026 SCN LR_PORT (0);g=0x1c7a                    D2,P0  D2,P0  8     NA   
07:37:34.029 SCN Port Online;g=0x1c7a                    D2,P0  D2,P1  8     NA   
07:37:34.029 Port Elp engaged                            D2,P1  D2,P0  8     NA   
07:37:34.029 SCN Port F_PORT                             D2,P1  D2,P0  8     NA   
07:37:34.029 *Removing all nodes from port               D2,P0  D2,P0  8     NA   
07:38:15.288 SCN Port Offline;g=0x1c7c                   D2,P0  D2,P0  8     NA   
07:38:15.288 *Removing all nodes from port               D2,P0  D2,P0  8     NA   
07:38:47.078 SCN LR_PORT (0);g=0x1c7c                    D2,P0  D2,P0  8     NA   
07:38:47.081 SCN Port Online;g=0x1c7c                    D2,P0  D2,P1  8     NA   
07:38:47.081 Port Elp engaged                            D2,P1  D2,P0  8     NA   
07:38:47.081 SCN Port F_PORT                             D2,P1  D2,P0  8     NA   
07:38:47.081 *Removing all nodes from port               D2,P0  D2,P0  8     NA   
07:39:28.306 SCN Port Offline;g=0x1c7e                   D2,P0  D2,P0  8     NA   
07:39:28.306 *Removing all nodes from port               D2,P0  D2,P0  8     NA   
07:40:00.130 SCN LR_PORT (0);g=0x1c7e                    D2,P0  D2,P0  8     NA   
07:40:00.133 SCN Port Online;g=0x1c7e                    D2,P0  D2,P1  8     NA 

Valued Contributor
Posts: 931
Registered: ‎12-30-2009

Re: Port Flapping problem

Things you can try as well

-swapping hba's

-moving hosts to a different port

-fix the speed of the ports if its on AN

New Contributor
Posts: 4
Registered: ‎12-21-2011

Re: Port Flapping problem

Hello dion.v.d.c,

Thank you for you answer,

we have tried all that you recommended,

but the result is the same.

we found a bug DEFECT000308461 which is corrected in 6.4.2 FOS,

In your opinion that bug is the same as our problem?

If it is we should upgrade the firmware, but it has very high risk.

Thank you very much.

Peter

Valued Contributor
Posts: 931
Registered: ‎12-30-2009

Re: Port Flapping problem

we found a bug DEFECT000308461 which is corrected in 6.4.2 FOS,

In your opinion that bug is the same as our problem?

Could well be, but I'm not sure.

If it is we should upgrade the firmware, but it has very high risk.

That's always a good idea, best to keep switches in your fabric on the same level, it currently isn't.

But what do you mean with the high risk, upgrades are non-disruptive.

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