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Posted by on May 12, 2008, 8:03 pm
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On 5=D4=C29=C8=D5, =CF=C2=CE=E76=CA=B107=B7=D6, Albert Manfredi <bert22...@h=
otmail.com> wrote:
> On May 9, 8:15 pm, aaabb...@hotmail.com wrote:
>
> > I am trying to understand your "words"
> > For backup port, assume there are multiple ports on the same segement,
> > before topology change, Does the backup port automatically random
> > selected? after the active port down, the backup port immediately
> > become active port.
> > I think it shouls impact whole tree.
>
> They show pictures in Clause 17. A backup port connects to a true
> redundant link between two switches. That's the easiest fix. If the
> two switches are still good, but the link between them goes bad, going
> quickly to the backup link is very simple.
>
> Alternate links do change the spanning tree, but there are tricks you
> can use to prevent loops when going to an alternate link. For
> instance, only choosing an alternate that leads away from the root
> node.
>
> Bert
Thanks Albert.
=46rom all switches power up to stable stage ( assume every switch power
up same time), Do STP and RSTP use same time or RSTP faster than
STP?
I think no difference for this stage. it has to select root first
then ...
RSTP faster than STP only when link failed and then recoved back case.
right?
TIA
st
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