[c-nsp] X6708-10G-3C compatible with 7604 chassis?

[Lobo]

Hmm, that's an interesting thought.  Not the first time that a certain 
hardware version has had issues vs another version.  We're attempting to 
RMA one of the fan modules and see if this resolves the problem.

Jose

On 3/21/2014 11:54 AM, Chris Welti wrote:
> When you insert a card that needs more than 75cfm, the fan will be 
> switched from restricted-power to full-power by the IOS software.
> I'm starting to believe there are different FAN-MOD-4HS out there, and 
> some of them only support 75cfm per slot
> (300cfm in total) vs. those that also support 94cfm per slot in full 
> power mode (which you need for the X6708-10G-3CXL).
> Might be worth trying a newer hardware revision of the FAN-MOD-4HS.
>
> Chris
>
> Am 21.03.14 11:31, schrieb Lobo:
>> Wow I never knew about that switch. Ours had the variable and full 
>> options and we moved it over to full. The fan is definitely running 
>> at the higher speeds but I think there's a problem with the 
>> reporting. The router still can't get the proper information from the 
>> fan module so it still thinks it's operating at 75 cfm. Reboots don't 
>> help it at all and so the 6708 still thinks it doesn't have enough 
>> cooling capacity to start it up.
>>
>> My colleague made an interesting observation and that is that prior 
>> to inserting the X6708-10G-3C card the fan was operating correctly 
>> and reporting everything like this:
>>
>> fan-tray 1:
>> fan-tray 1 type: FAN-MOD-4HS
>> fan-tray 1 mode: Restricted-power
>> fan-tray 1 fan-fail: OK
>> chassis per slot cooling capacity: 75 cfm
>>
>> Once the 6708 card is inserted, the fan module almost seems like it 
>> loses it's ROM information or something because it then reports like 
>> this:
>>
>> fan-tray 1:
>> fan-tray 1 type:
>> fan-tray 1 fan-fail: OK
>> chassis per slot cooling capacity: 70 cfm
>>
>> This has happened twice now (once in the field and once in our lab). 
>> I'm wondering if the insertion is somehow affecting the fan module?
>>
>> Jose
>>
>> On 3/21/2014 10:40 AM, Tim Durack wrote:
>>> This might help you:
>>>
>>> In the Cisco 6504 E, on the FAN-MOD-4HS fan-tray there is a switch 
>>> at the rear. This switch should be in the "A" position. See Figure 
>>> 2.1.1.
>>> This allows the fan to run in high-power mode. In this mode it 
>>> generates an airflow of 100 ft3/min per slot.
>>>
>>> When the switch is in the "M" position it operates in the 
>>> restricted-power mode and generates only 75 ft3/min per slot. The 
>>> WS-X6716-10GE line card has a cooling requirement of 84 ft3/min. In 
>>> this case it could prevent the line card from powering up.
>>>
>>> Note: on another FAN-MOD-4HS fan-tray the positions of the switch 
>>> are labeled "VARIABLE" and "FULL". The switch should be put in the 
>>> "VARIABLE" position.
>>>
>>>
>>> On Fri, Mar 21, 2014 at 9:49 AM, Lobo <lobotiger at gmail.com 
>>> <mailto:lobotiger at gmail.com>> wrote:
>>>
>>> Agreed. But even after a reboot, the chassis is still not
>>> allowing this 6708 card to come up because it complains about
>>> insufficient cooling.
>>>
>>> This is pretty annoying as their documentation shows that the 7604
>>> is compatible with this card but now we're starting to wonder if
>>> that's truly the case.
>>>
>>> Jose
>>>
>>>
>>> On 3/21/2014 9:42 AM, Phil Mayers wrote:
>>>
>>> On 21/03/14 12:15, Lobo wrote:
>>>
>>> Even though the cards are not completely compatible for
>>> totals # of
>>> routes (3C vs 3CXL) the system should default to the
>>> lowest card but I
>>> would think that it would still power up the card and let
>>> it function
>>> normally.
>>>
>>>
>>> No; the PFC/DFCs must all match. The other PFC/DFC need to be
>>> *downgraded* to non-XL mode, and that need a chassis reboot.
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>>>
>>> -- 
>>> Tim:>
>>
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