Receiving: 4B436A3D 0313233216 T H fscsi0 LINK ERROR Post: 302968896

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Operating Systems AIX Receiving: 4B436A3D 0313233216 T H fscsi0 LINK ERROR Post 302968896 by hicksd8 on Tuesday 15th of March 2016 04:24:47 PM

03-15-2016

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I see this thread has been open for over a day without resolution so, although I'm not qualified to answer the specifics, I thought I'd chip in anyway.

Firstly, my disclaimer. I'm not an AIX expert by any means and I have no knowledge of the LP11002. However, I do know the QL2464 very well and I was the technical director of a storage distributor many years ago and we shipped loads of fibre channel kit. So all I can do is tell you where I'd be looking in the first instance. I could well be completely wrong but here goes...........

The symptoms you describe indicate that everything is fine until the link gets really busy, then it screws up. Normal FC payload is 2112 giving a MTU of 2148 bytes total allowing for headers, etc. Some FC adapters support "jumbo" packets with a payload up to 9000 giving a MTU of 9036 bytes with headers. If the adapter supports jumbos, whether jumbo packets are enabled or not is a setting in the adapter BIOS. So if one adapter is set for jumbo and the other doesn't support jumbo then everything will work find with low traffic but when things really get going one of the adapters suddenly sends a jumbo packet that the other adapter cannot understand. So if I was fighting this issue I would look at both adapters and set the max payload to 2112 or the max MTU to 2148 or set the "support jumbo packets=no". Then test to see if the problem has gone away.

Needless to say, should you get to a known good working situation only change one thing at a time afterwards and fully test that it hasn't screwed up again.

I have no clue whether this will help you or not.

Good luck anyway.

Last edited by hicksd8; 03-15-2016 at 05:35 PM..

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LEARN ABOUT REDHAT

drop_operator

DROP 
OPERATOR(7)						   SQL Commands 						  DROP OPERATOR(7)

NAME

       DROP OPERATOR - remove a user-defined operator

SYNOPSIS

       DROP OPERATOR id ( lefttype | NONE , righttype | NONE ) [ CASCADE | RESTRICT ]

   INPUTS
       id     The identifier (optionally schema-qualified) of an existing operator.

       lefttype
	      The type of the operator's left argument; write NONE if the operator has no left argument.

       righttype
	      The type of the operator's right argument; write NONE if the operator has no right argument.

       CASCADE
	      Automatically drop objects that depend on the operator.

       RESTRICT
	      Refuse to drop the operator if there are any dependent objects.  This is the default.

   OUTPUTS
       DROP OPERATOR
	      The message returned if the command is successful.

       ERROR: RemoveOperator: binary operator 'oper' taking 'lefttype' and 'righttype' does not exist
	      This message occurs if the specified binary operator does not exist.

       ERROR: RemoveOperator: left unary operator 'oper' taking 'lefttype' does not exist
	      This message occurs if the left unary operator specified does not exist.

       ERROR: RemoveOperator: right unary operator 'oper' taking 'righttype' does not exist
	      This message occurs if the right unary operator specified does not exist.

DESCRIPTION

       DROP OPERATOR drops an existing operator from the database.  To execute this command you must be the owner of the operator.

       The left or right type of a left or right unary operator, respectively, must be specified as NONE.

   NOTES
       The DROP OPERATOR statement is a PostgreSQL language extension.

       Refer to CREATE OPERATOR [create_operator(7)] for information on how to create operators.

USAGE

       Remove power operator a^n for int4:

       DROP OPERATOR ^ (int4, int4);

       Remove left unary negation operator (! b) for boolean:

       DROP OPERATOR ! (none, bool);

       Remove right unary factorial operator (i !) for int4:

       DROP OPERATOR ! (int4, none);

COMPATIBILITY

   SQL92
       There is no DROP OPERATOR in SQL92.

SQL - Language Statements					    2002-11-22							  DROP OPERATOR(7)