Strongly in favour,
A similar problem occurs in an IPX environment.
Make sure all Servers/Clients are 'portfast' and
switch/switch disable 'portfast'.
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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