Re: Nexus network Design - Switching LOOP

A nice thread and question, good stuff people; I love to learn from you
all.

As a side note, and you all probably already know but ... Shortest Path
Bridging (SPB) is the IEEE replacement for STP. Things will get a lot
easier when SPB is the default on all shipping switches. Given technology
today, why should we ever have to worry about loops? A lot of this basic
stuff should just work ...

Some vendors (Cisco and Juni for example) have not fully embraced SPB and
want to take customers down a proprietary / single vendor path (claim its
based on standards though ...). From a sales perspective, I really can't
blame them, they need to protect their install base ...

For this forum, I would suggest to request SPB in all the products you
deploy ... it solves these problems and also allows interop and multi
vendors. NANOG had some good intro and videos on SPB if anyone wanted to
learn more...

HTH,

Andrew Lissitz, CCIE 31840

On Tue, Mar 13, 2012 at 9:20 AM, jack daniels <jckdaniels12_at_gmail.com>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
> >>>>>
> >>>>>
> >>>>> Blogs and organic groups at http://www.ccie.net
> >>>>>
> >>>>>
> _______________________________________________________________________
> >>>>> Subscription information may be found at:
> >>>>> http://www.groupstudy.com/list/CCIELab.html
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>
> >>>> --
> >>>> 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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>
>
>
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>
>

-- 
Andrew Lee Lissitz
all.from.nj_at_gmail.com
Blogs and organic groups at http://www.ccie.net