Re: Nexus network Design - Switching LOOP

Jack,
     I think you are missing the bigger picture. You can transport all
the VLANs you want. But with your design (regardless of the port density
issue that is forcing the N2Ks to be added) you have an STP issue. You
need to reconsider the use of VPCs. Read this and rethink your solution.
This is NX-OS. Not IOS. And the additional feature set is the way to go
for this solution.

Datacenter Design with 5Ks, 2Ks, and VPC
http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps9670/C07-572829-01_Design_N5K_N2K_vPC_DG.pdf

-Hammer-

"I was a normal American nerd"
-Jack Herer

On 3/13/2012 8:20 AM, jack daniels wrote:
> Hi,
>
> but the ports will be transporting multple vlans.
>
> Regards
>
>
> On Tue, Mar 13, 2012 at 6:47 PM, Radioactive Frog<pbhatkoti_at_gmail.com> wrote:
>> Totally agreed - no need of STP.
>> VPC is thw way to go
>> Have not touched Nexus for the last 9 months - is TRILL supported on the
>> latest codes yet?
>> on edge where you have 2k connected to 3750 - put that port in edge mode.
>>
>>
>> On Tue, Mar 13, 2012 at 11:55 PM, Carlos G Mendioroz<tron_at_huapi.ba.ar>
>> wrote:
>>> Yes, so what ?
>>> As I said, STP is a bad word. You don't have to have STP in your design!
>>> -Carlos
>>>
>>> jack daniels @ 13/03/2012 09:49 -0300 dixit:
>>>
>>>> Hi Carlos,
>>>>
>>>> There is 2K in between which doesn't support STP.
>>>>
>>>> Regards
>>>>
>>>>
>>>> On Tue, Mar 13, 2012 at 5:45 PM, Carlos G Mendioroz<tron_at_huapi.ba.ar>
>>>> wrote:
>>>>> STP is a bad word in Nexus :)
>>>>> So you should take a look at VPC!
>>>>>
>>>>> Short story: make the two N5Ks behave as one entity to the 3750,
>>>>> and make a LAG (etherchannel) between them.
>>>>>
>>>>> -Carlos
>>>>>
>>>>>
>>>>> http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps9670/configuration_guide_c07-543563.html
>>>>>
>>>>> jack daniels @ 13/03/2012 08:53 -0300 dixit:
>>>>>>
>>>>>> Hi Guys,
>>>>>>
>>>>>> I have a scenario for which I'm scratching my head since long - please
>>>>>> help
>>>>>>
>>>>>>
>>>>>> Nexus 5K-1---------Nexus5K-2
>>>>>> | |
>>>>>> | |
>>>>>> Nexus2K-1 Nexus2K-2
>>>>>> | | Port eth 1/1
>>>>>> | |
>>>>>> Cisco 3750-----------------------
>>>>>>
>>>>>>
>>>>>> In this scenario Switching LOOP is getting formed. Only way I'm able
>>>>>> to get rid is shutdown Port eth1/1 on Nexus2K-2. Please help in this
>>>>>> case.
>>>>>>
>>>>>> Thanks in anticipation in adavance.
>>>>>>
>>>>>> Regards
>>>>>> Jack
>>>>>>
>>>>>>
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>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>> --
>>>>> Carlos G Mendioroz<tron_at_huapi.ba.ar> LW7 EQI Argentina
>>>
>>> --
>>> Carlos G Mendioroz<tron_at_huapi.ba.ar> LW7 EQI Argentina
>>>
>>>
>>> Blogs and organic groups at http://www.ccie.net
>>>
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>
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Received on Tue Mar 13 2012 - 08:32:22 ART