[c-nsp] DOM redux

[Marian Durkovic]

On Tue, Apr 03, 2007 at 02:37:20PM -0400, Chris Griffin wrote:
> Hi all,
> 	We are thinking about switching to DOM based SFPs and are experimenting 
> with them.  So far we have found them to work ok with:
> 
> 3750 with SEE2 code.
> 3750me with 12.2.35SE2 code (SEG gave bad RX values).
> 6509/7609/Sup720 on the sup SFP ports themselves.
> 
> Haven't yet tried them on 2960s.

Works fine on 2960s and also on 3560s and 2970s - but you must use IOS which
has CSCsd55237 fix included.

> Of course the big hold out seems to be the 6724SFP card.  I have seen a 
> few threads in the past on DOM support here, but never seemed to come to 
> a conclusion.  Is this just a waiting game until the software catches 
> up, or is this a fundamental hardware issue with the 6724. I would 
> think software based on the fact that the SFP can be interrogated for 
> other things such as serial number, etc.

Well, the SFP EEPROM and DOM data are accessible via the same 2-wire serial
interface - the only difference is that EEPROM is at address 0xA0 and 
DOM at address 0xA2. No idea why DOM doesn't work on these linecards...

But we're working with our account team on this for several weeks already,
since DOM is of high importance for our network. We're still waiting
for the final answer, whether this would be fixable by some software
workaround or would require new hardware revision. 
   


	With kind regards,

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----   Marian Durkovic                       network  manager         ----
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----   Slovak Technical University           Tel: +421 2 524 51 301   ----
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