[e-nsp] EAPS and STP

[Changjie]

Sorry for my ignorance, would it be alright if you were to run just EAPS
entirely?
Or some VLANs resides on Switch A and B but not to the rest?


On Fri, Jan 8, 2010 at 3:48 AM, Jay Nakamura <zeusdadog at gmail.com> wrote:

> I am posting this so if anyone else encounters the same question, they
> can find the answer.
> According to Extreme support folks, indeed, if the two switches are on
> the EAPS ring and you connect ports between the two, you can not avoid
> a L2 loop even if those ports are running STP.  The solution is to
> switch from EAPS to STP.
>
>
>
> On Tue, Jan 5, 2010 at 9:36 PM, Jay Nakamura <zeusdadog at gmail.com> wrote:
> > I have a question about using STP and EAPS.
> >
> > If, for example, I have 4 switches on EAPS ring.  A -> B -> C -> D ->
> back to A
> >
> > A & B is at the same location.  If I enable STP on the protected VLAN
> > for ports not participating in the EAPS ring on switch A and B, and
> > accidentally connect a port from switch A and B together, STP won't
> > see a loop and block the port, would it?  (Since STP on each switch
> > doesn't see each other)
> >
> > Is there a way to avoid a loop in this kind of topology while using
> > EAPS?  Or do I need to go back to RSTP and not use EAPS?
> >
> > Thanks in advance!
> >
> > -Jay
> >
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