>Number:         12279
>Category:       misc
>Synopsis:       netboot client hangs during boot in /etc/rc.d/root
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    misc-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Feb 24 14:13:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Ingolf Steinbach
>Release:        NetBSD-1.5
>Organization:
none
>Environment:
System: NetBSD isdn 1.5 NetBSD 1.5 (ISDN) #0: Fri Feb 23 21:41:15 MET 2001 ingolf@isdn:/usr/obj/sys/arch/i386/compile/ISDN i386


>Description:
	When netbooting, the boot process hangs during execution of
	/etc/rc.d/root. These are the last words:

		root on we1
		nfs_boot: trying RARP (and RPC/bootparam)
		nfs_boot: client_addr=192.168.2.4 (RARP from 192.168.2.1)
		nfs_boot: server_addr=192.168.2.1
		nfs_boot: hostname=isdn.local.net
		nfs_boot: gateway=192.168.2.1
		nfs_boot: my_mask=255.255.255.0
		root on boot:/export/isdn/root
		Automatic boot in progress: starting file system checks.
		mount_nfs: rpcbind on server: RPC: Unable to send

	This happens in the "mount /" line. The "Unable to send" message
	is repeated after a while.

	The machine has already successfully got its network configuration
	via rarp and bootparam. The remote root directory is already
	mounted via nfs at this point (i.e. it is not unmounted by the
	preceeding "umount -a >/dev/null 2>&1").

	In case this is important: both (netboot-) server and client
	run kernels with IPv6 enabled. The client's site local v6-address
	is not yet configured at this point.

	A tcpdump on the server does not show any traffic during the
	"Unable to send" messages.

	After hitting ^C on the client, the boot process continues
	without problems.
>How-To-Repeat:
	Netboot a machine (with IPv6 kernel). Watch it hang during
	/etc/rc.d/root.
>Fix:
	At the moment, I am using the following workaround, but this
	probably is not The Right Thing:

	# echo 'rcvar=root' >> /etc/rc.conf.d/root
	# echo 'root=NO' >> /etc/rc.conf
>Release-Note:
>Audit-Trail:
>Unformatted: