Brocade 8GB and 16GB "Mod_Inv Speed Mismatch / Incompatible SFP"

Asset ID:	1-72-1426773.1
Update Date:	2013-10-17
Keywords:

Solution Type Problem Resolution Sure

Solution 1426773.1 : Brocade 8GB and 16GB "Mod_Inv Speed Mismatch / Incompatible SFP"

Applies to:

Brocade 300 Switch - Version Not Applicable and later
Information in this document applies to any platform.

Symptoms

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When trying to establish an 8GB link on an Brocade 8GB capable Switch, you might detect the following error message: "Mod_Inv - Speed Mismatch / Incompatible SFP"

From a switchshow:

Index Port Address Media Speed State Proto
==============================================
0 0 010000 id N4 No_Light FC
1 1 010100 id N4 No_Light FC
2 2 010200 id N4 No_Light FC
3 3 010300 id N8 Mod_Inv FC "Speed Mismatch / Incompatible SFP"
4 4 010400 id N8 Mod_Inv FC "Speed Mismatch / Incompatible SFP"
5 5 010500 id N4 No_Light FC
6 6 010600 id N8 Mod_Inv FC "Speed Mismatch / Incompatible SFP"
7 7 010700 id N8 Mod_Inv FC "Speed Mismatch / Incompatible SFP"

We can see the same behavior for 10GB SFPs and valid Brocade SFPs , ie on a 6510 :

42 42   012a00   id    N16   Mod_Inv     FC "Speed Mismatch / Incompatible SFP"

=============
Port 42:
=============
Identifier: 3    SFP
Connector:   7    LC
Transceiver: 8001101200000000 10_Gbps SM lw Long_dist
Encoding:    6    64B66B
Baud Rate:   105 (units 100 megabaud)
Length 9u:   10   (units km)
Length 9u:   100 (units 100 meters)
Length 50u: 0    (units 10 meters)
Length 62.5u:0    (units 10 meters)
Length Cu:   0    (units 1 meter)
Vendor Name: BROCADE
Vendor OUI: 00:05:1e
Vendor PN:   57-1000115-01
Vendor Rev: A
Wavelength: 1310 (units nm)
Options:     001a Loss_of_Sig,Tx_Fault,Tx_Disable
BR Max:      0
BR Min:      0
Serial No:   KDA112284000781
Date Code:   120712
DD Type:     0x68
Enh Options: 0xf0
Status/Ctrl: 0x82
Alarm flags[0,1] = 0x0, 0x40
Warn Flags[0,1] = 0x0, 0x40
                                          Alarm                  Warn
                                   low        high       low         high
Temperature: 50      Centigrade    -5          90         0           85
Current:     0.000   mAmps          10.000     95.000     12.000      80.000
Voltage:     3304.8 mVolts         2970.0      3630.0    3134.9       3465.0
RX Power:    -19.3   dBm (11.8 uW) 14.5   uW 2238.7 uW   36.3   uW 1122.0 uW
TX Power:    -inf    dBm (0.0   uW)60.3   uW   2238.7 uW 151.4 uW   1122.0 uW

Cause

This is caused by the usage of non brocade branded SFP modules. Any NON Brocade branded SFP in an 8GB FC switch will display "Mod_Inv" (Module Invalid) output in switchshow.

On the new 16GB switch 6510, and incorrect replacement or SFP insertion could cause the same error, see doc
SFP Replacement on a Brocade 6510 Fibre Channel (FC) Switch (Doc ID 1516925.1)

Solution

For a Brocade 8GB capable Switch ( for example Brocade 300) you need to install the following SFP: 8G SWL 57-1000012-01 from Brocade.

For the 16GB capable switches, From "Fabric OS Administrator’s Guide 53-1002446-01" page 373,
this is because we need to install first the "10 Gigabit FCIP/Fibre Channel license" :

"10 Gigabit FCIP/Fibre Channel license to
use 10Gb FC ports on FC16-32 blades,
FC16-48 blades, and the Brocade 6510."

Please check for the latest information on the Brocade web, this link does not exist now, a similar one should be available
http://www.brocade.com/downloads/documents/matrices/brocade-compatibility-matrix.pdf

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