Ethernet Switches & Routers

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Contributor
Posts: 29
Registered: ‎12-08-2011

How Fabric Modules Affect The System/BigIron-RX16

Recently I found some strange error message in my box. Some times it will show error from show system fabric-error, but sometimes it disappear.

telnet@CORESW01-Brocade#sh syste fabric-error

==================== SNM SerDes Errors ====================

==================== SNM FIFO Congestion Errors ====================

==================== LP FAP Errors ====================

Slot6/FAP1: QDP Tail Discard Pkt Count = 228

Slot6/FAP3: QDP Tail Discard Pkt Count = 5361

Slot10/FAP1: QDP Tail Discard Pkt Count = 168

Slot10/FAP4: QDP Tail Discard Pkt Count = 14

Slot12/FAP2: QDP Tail Discard Pkt Count = 3

Slot12/FAP3: QDP Tail Discard Pkt Count = 2

Slot12/FAP4: QDP Tail Discard Pkt Count = 331

Slot13/FAP1: QDP Tail Discard Pkt Count = 1

Slot14/FAP1: QDP Tail Discard Pkt Count = 268

Slot14/FAP3: QDP Tail Discard Pkt Count = 44

Slot14/FAP4: QDP Tail Discard Pkt Count = 6

Slot16/FAP1: QDP Tail Discard Pkt Count = 44

Slot16/FAP4: QDP Tail Discard Pkt Count = 13

telnet@CORESW01-Brocade#sh syste fabric-error

==================== SNM SerDes Errors ====================

==================== SNM FIFO Congestion Errors ====================

==================== LP FAP Errors ====================

telnet@CORESW01-Brocade#sh syste fabric-error

==================== SNM SerDes Errors ====================

==================== SNM FIFO Congestion Errors ====================

==================== LP FAP Errors ====================

telnet@CORESW01-Brocade#sh syste fabric-error

==================== SNM SerDes Errors ====================

==================== SNM FIFO Congestion Errors ====================

==================== LP FAP Errors ====================

I dont know how it will affect my system, I am affraid that it will cause further problem if not solve soon. Kindly please share if you havve any thought?

Any response, I will highly appreciate.

Thank you

Chairul Manalu

Super Contributor
Posts: 1,087
Registered: ‎12-13-2009

Re: How Fabric Modules Affect The System/BigIron-RX16

Hi Chairul,

     I believe that QDP Tail Discard counter is letting you know that some packets were dropped due to maxing out the queue depth of QoS queues.

     This is why you do not see the error all the time as the counters will expire. However if you are concerned about these discards then I suggest you log a call with the TAC.

Thanks

Michael.

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