On Sat, 7 Jul 2001, Andrew Fort wrote:
> Some machines (read: ones that can boot quickly) can timeout for dhcp
> requests irrecoverably before the switchport has gone through the listening
> and learning stages in the spanning tree process. portfast assumes that
> these steps are not required -- the port must be connected to an "end
> station".
I thought this was accounted for in the DHCP specs, that you need to wait
at least 30 seconds before deciding that the dhcp server is unavailable. A
lot of network cards do not do "link-up" until the driver initialises the
card and thus you're in the 30 second wait period when you bring up the
link and then starts asking for dhcp servers.
-- Mikael Abrahamsson email: swmike@swm.pp.se
This archive was generated by hypermail 2b29 : Sun Aug 04 2002 - 04:12:44 EDT