It's the same old thing. You gotta turn on portfast.
P.
At 09:15 PM 4/30/01, Jason Roysdon wrote:
>Oh, speaking of AppleTalk. We've got a customer (not mine, but one of the
>engineers working the account bounced this off me): They claim their new
>Macs can't access the network if Spanning Tree is enabled. Supposedly this
>has been verified by Apple and TAC (but we've never had a customer lie to
>us, so that must be gospel, right. Heh, not). I don't know what exactly
>the details are, but basically it just doesn't function. The simple
>solution is to kill spanning-tree on all the switches, but this is at a
>number of public schools, and I can't wait to hear about a kid bringing in
>his Linksys 8 port 10/100 switch and melting their network.
>
>Anyone else hear such rumors?
>
>--
>Jason Roysdon, CCNP+Security/CCDP, MCSE, CNA, Network+, A+
>List email: [EMAIL PROTECTED]
>Homepage: http://jason.artoo.net/
>
>
>
>""Priscilla Oppenheimer"" wrote in message
>[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > At 11:08 AM 4/30/01, Phil Barker wrote:
> > >Strongly in favour,
> > >
> > >A similar problem occurs in an IPX environment.
> > >Make sure all Servers/Clients are 'portfast' and
> > >switch/switch disable 'portfast'.
> >
> > A similar problem happens with AppleTalk too. That's what we get for
> > expecting switches to replace hubs in a topology. ;-) They were designed
>as
> > bridges and to talk to other bridges. Despite switches being the
> > new-fangled thing (well, sort of new), a lot of their functionality is
> > vintage 1980s.
> >
> > Priscilla
> >
> >
> > >Regards,
> > >
> > >Phil.
> > >--- John Gotti wrote: > Hey
> > >all...we are having a problem where workstations
> > > > sporatically will not
> > > > be able to obtain an IP address from our DHCP
> > > > server. After about 4 minutes,
> > > > you can perform a manual renew from WINIPCFG and you
> > > > get your IP address.
> > > > This has baffled me for quite some time and I have
> > > > recently been told it is
> > > > our Cisco 2924 Switch to blame. The story I was told
> > > > is below. I welcome any
> > > > comments for or against this opinion. Thank you for
> > > > your time.
> > > >
> > > >
> > > > "It appears the problem is connected to the
> > > > spanning tree algorithm used
> > > > by the CISCO switches. By default, ports on the
> > > > switch block as they are
> > > > initialised; during this phase the port is in its
> > > > spanning tree algorithm
> > > > learning and listening state - it is not
> > > > forwarding. This is specifically
> > > > aimed at ports that will be used to connect to other
> > > > switches/routers in a
> > > > stack. After a default time (4 mins?) they switch to
> > > > the standard forwarding
> > > > mode and everything seems normal, the problem is
> > > > that you have missed all
> > > > the important DHCP broadcast and acknowledgment from
> > > > client to DHCP server
> > > > during this period.
> > > >
> > > > You can change this default state by changing the
> > > > PORT-FAST setting on
> > > > each port. The port is then immediately in the
> > > > FORWARDING mode as it is
> > > > initialised. By default this setting is DISABLED,
> > > > I have ENABLED all
> > > > ports except the ports doing the linking to other
> > > > switches"
> > > >
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> >
> > ________________________
> >
> > Priscilla Oppenheimer
> > http://www.priscilla.com
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________________________
Priscilla Oppenheimer
http://www.priscilla.com
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