Hello...
Attached is some TCPDUMP output - taken while I was trying to run the
'elm' program off of a workstation which mounts /usr/local/bin (where elm
is) using a soft NFS mount, with a default rsize/wsize of 8K.
What happens is I get a 'retry' error and then a core dump when it gives
up. Changing the rsize/wsize to 512 bytes and/or 1K makes the problem go
away, but that obviously isn't a great idea. From a different sniffer
session that myself and our network support department ran, it appears that
a router is munching the return packets (the workstation and server are on 2
different IP segmenets).
In this output from tcpdump (run as : tcpdump -s 200 -m -vv host
jupiter(the nfs server) and udp), I can see several different requests with
the same ID
(1fb3071b), each followed with what appears to be the proper amount of data
replies
(the 'frag' entries from jupiter). the output does show that the client
does finally get what it wants and goes to another sequence id.
I just can't really figure out what's happening here.
I'm assuming that the 'fragments' I'm seeing are pieces of the data, but
is there any way to see if this is BAD data? Is that maybe why it's doing a
retransmit?
Any help would be appreciated...thanks...
-Ken Kleiner
System Manager - Umass Lowell
TCPDUMP output follows :
------------------------
13:45:36.953843 miranda.cs.uml.edu.1bb3071b > jupiter.cs.uml.edu.nfs-v3: 156
call getattr OSF/1 fh 11,133/1.2.874693677/2.874693677 (ttl 30, id 17180)
13:45:36.955795 jupiter.cs.uml.edu.1bb3071b > miranda.cs.uml.edu.nfs-v3: 112
reply getattr
{dir mode 755 nlink 33 uid 0 gid 0 size 1024 used 1024
specdata 0x0/0x3e8 fsid 0xb00085 fileid 2
atime 934393505.356491000 mtime 933340291.660202000
ctime 933340291.660202000} (ttl 29, id 58902)
13:45:36.955795 miranda.cs.uml.edu.1cb3071b > jupiter.cs.uml.edu.nfs-v3: 156
call getattr OSF/1 fh 11,133/1.138259.874694627/2.874693677 (ttl 30, id
17182)
13:45:36.957747 jupiter.cs.uml.edu.1cb3071b > miranda.cs.uml.edu.nfs-v3: 112
reply getattr
{dir mode 755 nlink 2 uid 0 gid 0 size 10752 used 11264
specdata 0x0/0x9cbd8 fsid 0xb00085 fileid 138259
atime 934393531.242945000 mtime 934391420.496809000
ctime 934391420.496809000} (ttl 29, id 58903)
13:45:36.957747 miranda.cs.uml.edu.1db3071b > jupiter.cs.uml.edu.nfs-v3: 156
call getattr OSF/1 fh 11,133/1.138705.874719889/2.874693677 (ttl 30, id
17184)
13:45:36.958723 jupiter.cs.uml.edu.1db3071b > miranda.cs.uml.edu.nfs-v3: 112
reply getattr
{reg mode 755 nlink 1 uid 0 gid 0 size 532480 used 540672
specdata 0x0/0x96fd8 fsid 0xb00085 fileid 138705
atime 934393278.917424000 mtime 824998118.000001000
ctime 898274931.727924000} (ttl 29, id 58904)
13:45:36.958723 miranda.cs.uml.edu.1eb3071b > jupiter.cs.uml.edu.nfs-v3: 156
call getattr OSF/1 fh 11,133/1.138705.874719889/2.874693677 (ttl 30, id
17185)
13:45:36.960675 jupiter.cs.uml.edu.1eb3071b > miranda.cs.uml.edu.nfs-v3: 112
reply getattr
{reg mode 755 nlink 1 uid 0 gid 0 size 532480 used 540672
specdata 0x0/0x96fd8 fsid 0xb00085 fileid 138705
atime 934393278.917424000 mtime 824998118.000001000
ctime 898274931.727924000} (ttl 29, id 58905)
13:45:36.969459 miranda.cs.uml.edu.1fb3071b > jupiter.cs.uml.edu.nfs-v3: 168
call read OSF/1 fh 11,133/1.138705.874719889/2.874693677 offset [|rpc] (ttl
30, id 17186)
13:45:36.970435 jupiter.cs.uml.edu.1fb3071b > miranda.cs.uml.edu.nfs-v3:
1472 reply read
{reg mode 755 nlink 1 uid 0 gid 0 size 532480 used 540672
specdata 0x0/0x96fd8 fsid 0xb00085 fileid 138705
atime 934393536.973335000 mtime 824998118.000001000
ctime 898274931.727924000} count 8192 (frag 58906:1480_at_0+) (ttl 29)
13:45:36.971411 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
58906:1480_at_2960+) (ttl 29)
13:45:36.971411 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
58906:1480_at_4440+) (ttl 29)
13:45:36.972387 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
58906:1480_at_5920+) (ttl 29)
13:45:36.972387 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag 58906:928_at_740
0) (ttl 29)
13:45:37.843006 miranda.cs.uml.edu.1fb3071b > jupiter.cs.uml.edu.nfs-v3: 168
call read OSF/1 fh 11,133/1.138705.874719889/2.874693677 offset [|rpc] (ttl
30, id 17187)
13:45:37.843982 jupiter.cs.uml.edu.1fb3071b > miranda.cs.uml.edu.nfs-v3:
1472 reply read
{reg mode 755 nlink 1 uid 0 gid 0 size 532480 used 540672
specdata 0x0/0x96fd8 fsid 0xb00085 fileid 138705
atime 934393537.845960000 mtime 824998118.000001000
ctime 898274931.727924000} count 8192 (frag 59005:1480_at_0+) (ttl 29)
13:45:37.844958 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
59005:1480_at_2960+) (ttl 29)
13:45:37.844958 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
59005:1480_at_4440+) (ttl 29)
13:45:37.844958 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
59005:1480_at_5920+) (ttl 29)
13:45:37.844958 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
59005:928_at_7400) (ttl 29)
13:45:39.591803 miranda.cs.uml.edu.1fb3071b > jupiter.cs.uml.edu.nfs-v3: 168
call read OSF/1 fh 11,133/1.138705.874719889/2.874693677 offset [|rpc] (ttl
30, id 17189)
13:45:39.592778 jupiter.cs.uml.edu.1fb3071b > miranda.cs.uml.edu.nfs-v3:
1472 reply read
{reg mode 755 nlink 1 uid 0 gid 0 size 532480 used 540672
specdata 0x0/0x96fd8 fsid 0xb00085 fileid 138705
atime 934393539.593129000 mtime 824998118.000001000
ctime 898274931.727924000} count 8192 (frag 59086:1480_at_0+) (ttl 29)
13:45:39.592778 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
59086:1480_at_2960+) (ttl 29)
13:45:39.592778 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
59086:1480_at_4440+) (ttl 29)
13:45:39.593753 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
59086:1480_at_5920+) (ttl 29)
13:45:39.593753 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
59086:928_at_7400) (ttl 29)
13:45:43.088613 miranda.cs.uml.edu.1fb3071b > jupiter.cs.uml.edu.nfs-v3: 168
call read OSF/1 fh 11,133/1.138705.874719889/2.874693677 offset [|rpc] (ttl
30, id 17190)
13:45:43.089590 jupiter.cs.uml.edu.1fb3071b > miranda.cs.uml.edu.nfs-v3:
1472 reply read
{reg mode 755 nlink 1 uid 0 gid 0 size 532480 used 540672
specdata 0x0/0x96fd8 fsid 0xb00085 fileid 138705
atime 934393543.090679000 mtime 824998118.000001000
ctime 898274931.727924000} count 8192 (frag 59249:1480_at_0+) (ttl 29)
13:45:43.089590 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
59249:1480_at_2960+) (ttl 29)
13:45:43.089590 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
59249:1480_at_4440+) (ttl 29)
13:45:43.090567 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
59249:1480_at_5920+) (ttl 29)
13:45:43.090567 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
59249:928_at_7400) (ttl 29)
13:45:50.165002 miranda.cs.uml.edu.3ab3071b > jupiter.cs.uml.edu.nfs-v3: 168
call read OSF/1 fh 11,133/1.138705.874719889/2.874693677 offset [|rpc] (ttl
30, id 17219)
13:45:50.167933 jupiter.cs.uml.edu.3ab3071b > miranda.cs.uml.edu.nfs-v3:
1472 reply read
{reg mode 755 nlink 1 uid 0 gid 0 size 532480 used 540672
specdata 0x0/0x96fd8 fsid 0xb00085 fileid 138705
atime 934393550.167944000 mtime 824998118.000001000
ctime 898274931.727924000} count 8192 (frag 59569:1480_at_0+) (ttl 29)
13:45:50.167933 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
59569:1480_at_2960+) (ttl 29)
13:45:50.167933 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
59569:1480_at_4440+) (ttl 29)
13:45:50.167933 jupiter.cs.uml.edu > miranda.cs.uml.edu: (frag
59569:928_at_7400) (ttl 29)
37 packets
Received on Wed Aug 11 1999 - 18:26:38 NZST