At 11:08 AM 3/14/2003 +0000, Amar KHELIFI wrote:
>ur right about the frames ability to use gig0/2 only if the gig0/1 goes
>down, but according to the standard, the link from which bpdu's arrive with
>a higher cost will be put on blocking, but visibely that is not the case.
>some one will surelly respond to this.


Keep in mind that only one side of a point to point LAN link will ever 
block.  One node on every LAN segment must be elected as the designated 
bridge port for the segment.    I posted a pretty long explanation of this 
awhile back but can't find it in my archives :(

Pete



>""John Brandis""  a icrit dans le message de
>news: [EMAIL PROTECTED]
> > Hey All,
> >
> > I am going through my network, which consists of a single 4006 at the
>core,
> > and some 14 2950's connected via gig fibre.
> >
> > Picture this, I have 4 2950's on each floor  (3 floors in my building,
yes
>I
> > know that does not equal 14 switch's) each have a gbic fibre connection
to
> > the 4006 core, whilst the other gig port go's to the next switch on that
> > level. So switch 1 connects int gig 0/2 to switch 2 gig 0/2
> >
> > My issue at the moment, is that when I have a look at the spanning tree
> > states, I see that both gig ports are in a forwarding state. That does
not
> > sound correct to me as I expected to see one blocking (the int gig 0/2)
>and
> > the link to the core in a forwarding state. Here is the output of one of
>my
> > switch's
> >
> > lvl13-sw1#sh spanning-tree blockedports
> >
> > Name                 Blocked Interfaces List
> > -------------------- ------------------------------------
> >
> > Number of blocked ports (segments) in the system : 0
> > ---------------
> > A showing of my active spanning tree ports shows
> > ------------------
> >
> > Interface        Port ID                     Designated
>Port
> > ID
> > Name             Prio.Nbr      Cost Sts      Cost Bridge ID
> > Prio.Nbr
> > ---------------- -------- --------- --- --------- --------------------
> > --------
> > Gi0/1            128.49           4 FWD         0  8192 0009.e87f.ea00
> > 128.75
> > Gi0/2            128.50           4 FWD         4 32769 000a.b7e3.2dc0
> > 128.50
> >
> > * I have noticed that the cost of the port is significantly higher which
> > would indicate to me that data not go over this interface unless the
> > interface gig 0/1 died.
> >
> > Am I right, or do I have an error on my network.
> >
> > Thanks for this guys/girls/etc/squid/
> >
> >
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