Re: kern/53329: netboot over nfs broken

[Julian Coleman <jdc%coris.org.uk@localhost>]

The following reply was made to PR kern/53329; it has been noted by GNATS.

From: Julian Coleman <jdc%coris.org.uk@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
	netbsd-bugs%netbsd.org@localhost, prlw1%cam.ac.uk@localhost
Subject: Re: kern/53329: netboot over nfs broken
Date: Mon, 4 Jun 2018 15:21:43 +0200

 Hi,
 
 >  - I successfully booted after increasing timeouts in
 >    sys/nfs/nfs_boot.c to
  
 >      7.2... nfs_boot: trying DHCP/BOOTP
 >     25.9... nfs_boot: timeout...
 >     30.9... nfs_boot: timeout...
 >     35.9... nfs_boot: timeout...
 >     40.9... nfs_boot: timeout...
 >  
 >    (old cisco catalyst switch)
 
 Can you configure portfast on the switch?  I'm guessing that the switch does
 not enable forwarding until spanning-tree negotiation has completed.  See:
 
   https://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-series-switches/10553-12.html
 
 for more details.
 
 If this worked previously, but fails now, then I also guess that we drop the
 link now and did not in the past.  (Each time the link comes up, the cisco will
 renegotiate and not enable forwarding for 30s.)
 
 Regards,
 
 Julian