fedora 11 alpha nfs not listening on udp port 2049?

[Robert P. J. Day]

On Wed, 4 Mar 2009, John Summerfield wrote:

... snip ...

> I'm running WBEL4 crossed with CentOS4. NFS works. Nothing's listening to port
> 2049.
>
> I'm also running CentOS4. Same deal.
>
> Likewise on a Debian system at the other end of my VPN.

  ok, here's the situation -- just more adventures in the lab today.
this all started when i couldn't mount an exported directory on an f11
alpha system to an embedded linux system.  so i changed things up
today.

  i now have two f11 alpha systems:

	192.168.1.1 (NFS server)	192.168.1.2 (NFS client)

statically set and connected through a simple switch -- there's no one
else on that 2-node network.  (and, yes, ping works in both
directions.)

  i've exported a simple directory under my home directory,
"showmount -e" on the server verifies it's exported, as it does from
the client as well, so everyone seems to agree that the directory is
NFS-mountable.

  on the client side, i type:

  # mount 192.168.1.1:/home/rpjday/rootfs /mnt

at which point the command hangs for a couple minutes, then returns
with:

  mount.nfs: mount system call failed

hmmmmmm.  on the server side, i decided to drop tcpdump on eth0, and i
got numerous repeats of the following:

tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
09:19:29.746158 IP 192.168.1.2.55077 > 192.168.1.1.sunrpc: S 2110643412:2110643412(0) win 5840 <mss 1460,sackOK,timestamp 689837822 0,nop,wscale 5>
09:19:29.749703 IP 192.168.1.1.sunrpc > 192.168.1.2.55077: S 2140216678:2140216678(0) ack 2110643413 win 5792 <mss 1460,sackOK,timestamp 4661466 689837822,nop,wscale 6>
09:19:29.746547 IP 192.168.1.2.55077 > 192.168.1.1.sunrpc: . ack 1 win 183 <nop,nop,timestamp 689837822 4661466>
09:19:29.746745 IP 192.168.1.2.55077 > 192.168.1.1.sunrpc: P 1:133(132) ack 1 win 183 <nop,nop,timestamp 689837822 4661466>
09:19:29.746821 IP 192.168.1.1.sunrpc > 192.168.1.2.55077: . ack 133 win 108 <nop,nop,timestamp 4661467 689837822>
09:19:29.751467 IP 192.168.1.1.sunrpc > 192.168.1.2.55077: P 1:33(32) ack 133 win 108 <nop,nop,timestamp 4661472 689837822>
09:19:29.751951 IP 192.168.1.2.55077 > 192.168.1.1.sunrpc: . ack 33 win 183 <nop,nop,timestamp 689837828 4661472>
09:19:29.752144 IP 192.168.1.2.55077 > 192.168.1.1.sunrpc: F 133:133(0) ack 33 win 183 <nop,nop,timestamp 689837828 4661472>
09:19:29.752305 IP 192.168.1.1.sunrpc > 192.168.1.2.55077: F 33:33(0) ack 134 win 108 <nop,nop,timestamp 4661473 689837828>
09:19:29.752541 IP 192.168.1.2.kink > 192.168.1.1.60204: S 2110169891:2110169891(0) win 5840 <mss 1460,sackOK,timestamp 689837828 0,nop,wscale 5>
09:19:29.752681 IP 192.168.1.1.60204 > 192.168.1.2.kink: S 2151425405:2151425405(0) ack 2110169892 win 5792 <mss 1460,sackOK,timestamp 4661473 689837828,nop,wscale 6>
09:19:29.752719 IP 192.168.1.2.55077 > 192.168.1.1.sunrpc: . ack 34 win 183 <nop,nop,timestamp 689837828 4661473>
09:19:29.753245 IP 192.168.1.2.kink > 192.168.1.1.60204: . ack 1 win 183 <nop,nop,timestamp 689837829 4661473>
09:19:29.753372 IP 192.168.1.2.kink > 192.168.1.1.60204: P 1:45(44) ack 1 win 183 <nop,nop,timestamp 689837829 4661473>
09:19:29.753440 IP 192.168.1.1.60204 > 192.168.1.2.kink: . ack 45 win 91 <nop,nop,timestamp 4661474 689837829>
09:19:29.754003 IP 192.168.1.1.60204 > 192.168.1.2.kink: P 1:29(28) ack 45 win 91 <nop,nop,timestamp 4661475 689837829>
09:19:29.754407 IP 192.168.1.2.kink > 192.168.1.1.60204: . ack 29 win 183 <nop,nop,timestamp 689837830 4661475>
09:19:29.763226 IP 192.168.1.2.kink > 192.168.1.1.60204: P 45:185(140) ack 29 win 183 <nop,nop,timestamp 689837839 4661475>
09:19:29.803022 IP 192.168.1.1.60204 > 192.168.1.2.kink: . ack 185 win 108 <nop,nop,timestamp 4661524 689837839>
09:19:29.995560 IP 192.168.1.1.60204 > 192.168.1.2.kink: P 29:97(68) ack 185 win 108 <nop,nop,timestamp 4661716 689837839>
09:19:29.996324 IP 192.168.1.2.kink > 192.168.1.1.60204: F 185:185(0) ack 97 win 183 <nop,nop,timestamp 689838072 4661716>
09:19:29.996561 IP 192.168.1.1.60204 > 192.168.1.2.kink: F 97:97(0) ack 186 win 108 <nop,nop,timestamp 4661717 689838072>
09:19:29.997013 IP 192.168.1.2.kink > 192.168.1.1.60204: . ack 98 win 183 <nop,nop,timestamp 689838073 4661717>
09:19:29.997786 IP 192.168.1.2.58109 > 192.168.1.1.sunrpc: S 2108454518:2108454518(0) win 5840 <mss 1460,sackOK,timestamp 689838073 0,nop,wscale 5>
09:19:29.997903 IP 192.168.1.1.sunrpc > 192.168.1.2.58109: S 2143912611:2143912611(0) ack 2108454519 win 5792 <mss 1460,sackOK,timestamp 4661718 689838073,nop,wscale 6>
... etc etc ...

  those similar blocks repeat several times until the mount command
gives up as above.  multiple attempts produce exactly the same result.

  thoughts?

rday
--

========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry:
    Have classroom, will lecture.

http://crashcourse.ca                          Waterloo, Ontario, CANADA
========================================================================