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Contributor
Posts: 39
Registered: ‎12-08-2011

hba connected to 2 FC switches - one is shows 8, another show 4

I got a esxi host that has an dual port hab connected to 2 FC switches

 

on one of the FC switches, it shows 8Gbps 

 

on another it shows 4Gbps

 

Is it the difference in modules used?

Valued Contributor
Posts: 761
Registered: ‎06-11-2010

Re: hba connected to 2 FC switches - one is shows 8, another show 4

Hi,

 

How is the speed configured? Autoneg or fixed speed?

Do both switchs support 8G? and its SFPs?

 

rgds,

Felipon

Contributor
Posts: 26
Registered: ‎09-11-2012

Re: hba connected to 2 FC switches - one is shows 8, another show 4

[ Edited ]

sfpshow -all | grep Trans

 

 

(Substitute -all for the slot/port (or just port) in question)

 

Run the above from both switches.

 

On one, I would suspect a return of 200,400,800_MB/s. (the connection showing 8).

 

Does the other also show this? If not, the SFP is suspect. (It's either a 4G SFP, or, its a faulty 8G SFP)

 

This assumes both switches are identical...

bs
Occasional Contributor
Posts: 10
Registered: ‎10-26-2011

Re: hba connected to 2 FC switches - one is shows 8, another show 4

you can try to configure a fixed 8Gbps speed with the command

 

portcfgspeed <portnumber> 8

 

or view port settings with portcfgshow <portnumber>

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