09-19-2012 12:26 PM
Looking for some advise as where to start troubleshooting this issue. This is a new setup.
The Setup. Primary Data Center SAN Connected to a two Brocade 300 switches. One port on the one switch has a Brocade 8GB 10Km Sfp purchased. At the Secondary Data Center we have a Single Brocade 300 switch with a attached SAN which also has a Brocade 8GB <10KM SFP.There is a dark fibre link that connects both of these together. There is no switching in between these at all, with the exception of a couple patch panels. The distance between the two sites is 4Km. When the Ports are set at 8GB(AutoNeg) or Hard Coded, I can move data, but its very very slow. 20MB/Sec. I see alot of CRC errors and invalid Transmited Word and started seeing a Warning on the Destination Brocade switch "Severe latency bottleneck detected at slot 0 port 7". YEs port 7 is the 10Km link. Also, around the same time the SAN links had flapped and had this same "Invalid Transmitted word type". Was suggested I run the following two commands on both sides.
portcfgfillword <PORT> 3
portcfglongdistance <PORT> LE 1
CRC ERORRS went away but still had "Invalid transmitted word type" and the same lack of speed. 20MB/SEC. Had coded one side too 4GB and the other side picked up the 4GB link. Cleared counters. And transfered 1TB of data accross the link. Was super nice. 100MB +/sec moving data. Where too start? Any Ideas?
09-20-2012 01:50 AM
Hi, you could experiment with the other settings on portcfgfillword - at least with end-devices it's not always the same setting.
Do you have 8Gb end-devices too? Perhaps you need to configure proper fill-word there too.
In the CMD reference it says that if you use QoS you should not use vc_init (the 1 in your portcfglondistance command).
09-20-2012 12:01 PM
The end devices are SAN Fibre connections which are 8GB as well. I never did set any setting on those ports as i figured those were suppose to work right out of the box. Maybe I assumed wrong.
04-19-2018 01:47 PM
Did you manage to solve the problem? We are experiencing the same issue with the ISL, but cant figure out why. We changed, the SPFs and the patchcord, but it didnt work.
04-19-2018 11:34 PM
As you mentioned you are receiving "Invalid transmitted word type" which means that you have wrong fill world settings.
Please past ouput of portcfgshow slot/port command.
04-20-2018 12:07 AM
There may be problem with fill world.
Please past oupurt of portcfgshow slot/port for ISL links.
04-20-2018 02:39 AM
It looks like that there is problem with fill world settings.
Could you please past output of portcfgshow slot/port ?
04-20-2018 06:49 AM
Please paste output of porcfgshow slot/port for ISL connections.