This would mean that every time you connected a new device to a switch
that all the other ports would shut down for 30 seconds or so, which
would wreak havoc on the network. It's only necessary to block the
newly connected port. If a switch has been connected to the port, STP
may change its mind about which ports to block but this won't happen to
all ports, just the ones specifically affected by topology changes.
At least that's how I think it works. ;-)
John
>>> "Michael L. Williams" 7/10/01 4:18:22 PM >>>
STP (by default) should take up to 50 secs, but I thought *all* ports
should
go into blocking mode first thing before the STP recalc starts....
otherwise
you could have a switching loop (broadcast storm) for up to 50 secs....
not
good....
Mike W.
"Peter Slow" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> nope. not if hes connecting to his root bridge. all of the interfaces
on
the
> root bridge will be in forwarding state, so he should see the
blocked
> interface on the 3548 switch.
>
> something is wrong.
>
> just remember that you dont plug things in and ~*BLIP*~ things start
> blocking.
> convergence takes like 50 seconds on a network set up with defaults.
>
> wait a few minutes bofore looking and see what you come up with.
> \
> -Peter Slow
>
>
> -----Original Message-----
> From: Gareth Hinton [mailto:[EMAIL PROTECTED]]
> Sent: Monday, July 09, 2001 9:34 PM
> To: [EMAIL PROTECTED]
> Subject: Re: Spanning tree cost for redundant connection. [7:11623]
>
>
> Only one end of the link will show as blocking, the other will stay
as
> forwarding even though no traffic can pass over the link.
> Check the other end to see if that is blocking.
>
> Regards,
>
> Gaz
>
> ""Ryan Ngai Hon Kong"" wrote in message
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > Hi,
> >
> > I have about 18 C3548 switches with UTP cross-over as a redundant
link
to
> > the core C6009 switches (1 unit) and the production link of LX &
SX
GBIC.
> > When the production link is in operation, all the GBIC ports is in
> > forwarding
> > state. However when I attach the redundant UTP cable at 1 C3548 to
the
> > another
> > C3548 (cascade), I wonder why they are still in forwarding state.
Here's
a
> > basic
> > layout.
> >
> > C3548 \ / C3548
> > (utp) | \ / | (utp)
> > C3548 ---- C6009 ----- C3548
> > (utp) | / \ | (utp)
> > C3548 / \ C3548
> >
> > How do I set the cascading port (as a redundant link) into
blocking
state?
> >
> > Regards,
> > Ryan
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=11834&t=11623
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