Problem: NFSROOT with netboot and 2.2.x

[Michael Maechtel <Michael.Maechtel@gmx.net>]

whenever i try to boot a 2.2.x kernel with netboot
everything goes all-right until it starts to mount nfs. 

At this point I get on my client:

Looking up port of RPC 100003/2 on 192.168.1.1
portmap: server 192.168.1.1 not responding timed out
Root-NFS: Unable to get nfsd port number from server, using default

Looking up port of RPC 100005/1 on 192.168.1.1
portmap: server 192.168.1.1 not responding timed out
Root-NFS: Unable to get mountd port number from server, using default
mount: server 192.168.1.1 not responding, timed out
ROOT-NFS: Server returned error -5 while mounting xxxxx
VFS: Unable to mount root fs via NFS ....


BUT, from time to time it works (maybe once in 10 times)
Very strange .... 
No problems at all with 2.0.x kernels. 

On my Debian system I use:

Client:
- Debian slink with Kernel 2.2.5
- netboot 0.8.1

Server:
- Debian slink with Kernel 2.2.5
- nfsd (2.2beta37) or knfsd (1.2) , which makes no difference ....

Any ideas?

Regards
Mike