Re: cam timer tuning

All I know is the 4948's suck. Give me a 3750 any day, I have been told
that the 4948's are better becasue they do IPv6 software instead of in
hardward like 3750. But I don't know for sure I would love to see someone
with some documentation on that. but I see all kinds of problems with the
4948's. if you change a intergrated motherboard with NIC on an end device
you have to clear ARP, but not with a 3750. Heard the 4948E are better, but
from the text that was provided it looked like a 4948E because the
"media" command was not provided for for the G1/49. In Fact the whole
topology looks like the same B/S being pushed by my company. if it is you
know me

Rob

On Fri, Dec 28, 2012 at 5:52 PM, Carlos G Mendioroz <tron_at_huapi.ba.ar>wrote:

> Hmm, go back to the first (rather cryptic) message:
>
>
> whenever we bring up a new
>> trunk link between Nexus 7K and 4948 we see unicast flooding caused due to
>> TCN's.
>>
>
> So in this particular case, we (well, he) knows that a TC has happened,
> and that it causes the flooding...
>
> -Carlos
>
> Marko Milivojevic @ 28/12/2012 19:48 -0300 dixit:
>
> TC and event correlation are not cause and effect. The issue is that a
>> host went down and someone was still transmitting to it. And can do so
>> for 4 more hours :-)
>>
>> --
>> Marko Milivojevic - CCIE #18427 (SP R&S)
>> Senior CCIE Instructor - IPexpert
>>
>> On Fri, Dec 28, 2012 at 1:43 PM, Carlos G Mendioroz <tron_at_huapi.ba.ar>
>> wrote:
>>
>>> That won't cut this, because the event happens *when there is a TC*.
>>> No way you will get ARP down to 15 seconds or so.
>>> Nah, identify your silent destinations and ping them from the DG :)
>>>
>>> -Carlos
>>>
>>> Marko Milivojevic @ 28/12/2012 15:38 -0300 dixit:
>>>
>>>>
>>>> On Fri, Dec 28, 2012 at 10:05 AM, Joseph L. Brunner
>>>> <joe_at_affirmedsystems.com> wrote:
>>>>
>>>>>
>>>>> You should unify all timers at 600 seconds.
>>>>>
>>>>> That number is usually good to me.
>>>>>
>>>>
>>>>
>>>> It's hard to change ARp timers in the entire domain. I was thinking
>>>> more along the lines of dramatically increasing the aging timers in
>>>> CAM tables to match the ARP :-)
>>>>
>>>> --
>>>> Marko Milivojevic - CCIE #18427 (SP R&S)
>>>> Senior CCIE Instructor - IPexpert
>>>>
>>>>
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>>>>
>>>>
>>>>
>>>>
>>> --
>>> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
>>>
>>>
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>>>
> --
> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
>
>
> Blogs and organic groups at http://www.ccie.net
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Received on Sat Dec 29 2012 - 00:28:36 ART