Ethernet Switches & Routers

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Registered: ‎03-07-2012

Identifying I2C Errors

Hi all - I've got a Brocade MLX NetIron 16-slot switch in my environment that had an I2C error a long time ago but due to changes in staff and bad documentation - I have no history on where this I2C issue is coming from so I've been trying to look for some information.

What I do know is that it had something to do with a line card in Slot 4:

S4: NI-MLX-10Gx4 4-port 10GbE Module  CARD_STATE_UP

What I noticed is that although the card state is "up" on "show module", all the interface configurations are missing and the port is down/down:

show int eth 4/1

10GigabitEthernet4/1 is down, line protocol is down

*note that it's down/down not disabled/down

TAC gave me a command to execute from privileged mode and this is the result:

dm i2c show-flags

Global I2C bad access data:

         status: Clear

         severity: Major

         mux tap: 0x0000000f

         dev ID: 0x00000000

         dev address: 0x00000000

Global I2C last good access data:

         mux tap: 0x00000004

         dev ID: 0x00000004

         dev address: 0x00000001

That last bit doesn't look too good to me - coupled with the fact that all ports on line-card 4 appear down I think there's a problem somewhere. Any ideas?

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