* round robin dns, multihomed host, nfs mounting issues
@ 2003-07-18 17:31 Jeff Davis
2003-07-19 10:34 ` Neil Brown
0 siblings, 1 reply; 6+ messages in thread
From: Jeff Davis @ 2003-07-18 17:31 UTC (permalink / raw)
To: nfs
I'm testing out a NFS server which has two interfaces on two different
subnets. I'm using a single hostname and round robin dns. Clients are
both RedHat Linux systems.
I can access the primary interface on server via NFS from any system on
my network. I can only access the second interface from hosts on the
same subnet. Unfortunately, round robin dns on systems that are not
local to subnets on either of the server's nics will randomly get one of
the two nics to access nfs fs through.
int 1 - 192.168.19.224
int 2 - 172.25.2.106
# can mount through int 1 from any host\
# can mount thoughh int 2 from same ip subnet as int 2
# cannot mount throught int 2 from remote ip subnets
# on local subnets, mounts work as desired through correct, optimal
interface on nfs server
# on remote subnets, round robin directs ~50% of mount requests
to server through int 2 which fail
why doesn't this work? doesn't even work if try to mount directly
using ip addresses. additionally, have build tcp support in NFS servers
kernel but get different error but scenarios appear to be same.
default gateway through int1, and system's hostname based on int1
-- NFS client on different subnet than either of the servers two nics
:/u/tdhf045> nslookup -sil oac195
Server: 192.168.8.94
Address: 192.168.8.94#53
Name: oac195.ep.hess.com
Address: 192.168.1.21
-- Round Robin DNS for nfs server
:/u/tdhf045> nslookup -sil beo224.ihess.com
Server: 192.168.8.94
Address: 192.168.8.94#53
Name: beo224.ihess.com
Address: 192.168.19.224
Name: beo224.ihess.com
Address: 172.25.2.106
-- Client can access server on both networks on NFS server
oac195:/u/tdhf045> traceroute beo224.ihess.com
traceroute: Warning: beo224.ihess.com has multiple addresses; using
192.168.19.224
traceroute to beo224.ihess.com (192.168.19.224), 30 hops max, 38 byte
packets
1 sw0311 (192.168.1.249) 1.006 ms 0.625 ms 0.559 ms
2 oac21c (192.168.12.253) 0.542 ms 0.537 ms 0.593 ms
3 beo224.ihess.com (192.168.19.224) 0.613 ms 0.625 ms 0.508 ms
oac195:/u/tdhf045> traceroute beo224.ihess.com
traceroute: Warning: beo224.ihess.com has multiple addresses; using
172.25.2.106
traceroute to beo224.ihess.com (172.25.2.106), 30 hops max, 38 byte
packets
1 sw0311 (192.168.1.249) 1.248 ms 0.584 ms 0.566 ms
2 oac21c (192.168.12.253) 0.507 ms 0.675 ms 0.514 ms
3 beo224.ihess.com (172.25.2.106) 0.598 ms 0.541 ms 0.515 ms
-- trying to mount filesystem
:/u/tdhf045> mount 192.168.19.224:/export/rsync /mnt
:/u/tdhf045> umount /mnt
:/u/tdhf045> mount 172.25.2.106:/export/rsync /mnt
mount: RPC: Timed out
:/u/tdhf045> mount -o tcp 172.25.2.106:/export/rsync /mnt
nfs server reported service unavailable: Address already in use
:/u/tdhf045> mount beo224.ihess.com:/export/rsync /mnt
:/u/tdhf045> mount beo224.ihess.com:/export/rsync2 /mnt2
mount: RPC: Timed out
:/u/tdhf045> mount | tail -1
beo224.ihess.com:/export/rsync on /mnt type nfs (rw,addr=192.168.19.224)
:/u/tdhf045> mount -o tcp beo224.ihess.com:/export/rsync2 /mnt2
:/u/tdhf045> mount | tail -2
beo224.ihess.com:/export/rsync on /mnt type nfs (rw,addr=192.168.19.224)
beo224.ihess.com:/export/rsync2 on /mnt2 type nfs
(rw,tcp,addr=192.168.19.224)
:/u/tdhf045> umount /mnt2
:/u/tdhf045> mount -o tcp beo224.ihess.com:/export/rsync2 /mnt2
nfs server reported service unavailable: Address already in use
tcpdump of things on client (hacdsc001 is dns server)
[root@oac195 root]# tcpdump -vvv -r capt
13:05:57.561448 oac195.ep.hess.com.631 > beo224.ihess.com.sunrpc: S [tcp
sum ok] 956382497:956382497(0) win 5840 <mss 1460,sackOK,timestamp
9309729 0,nop,wscale 0> (DF) (ttl 64, id 13056, len 60)
13:05:57.561707 beo224.ihess.com.sunrpc > oac195.ep.hess.com.631: S [tcp
sum ok] 947522422:947522422(0) ack 956382498 win 5792 <mss
1460,sackOK,timestamp 2394356 9309729,nop,wscale 0> (DF) (ttl 62, id 0,
len 60)
13:05:57.561765 oac195.ep.hess.com.631 > beo224.ihess.com.sunrpc: . [tcp
sum ok] 1:1(0) ack 1 win 5840 <nop,nop,timestamp 9309729 2394356> (DF)
(ttl 64, id 13057, len 52)
13:05:57.562427 oac195.ep.hess.com.631 > beo224.ihess.com.sunrpc: P
1:45(44) ack 1 win 5840 <nop,nop,timestamp 9309729 2394356> (DF) (ttl
64, id 13058, len 96)
13:05:57.562653 beo224.ihess.com.sunrpc > oac195.ep.hess.com.631: . [tcp
sum ok] 1:1(0) ack 45 win 5792 <nop,nop,timestamp 2394357 9309729> (DF)
(ttl 62, id 33666, len 52)
13:05:57.563067 beo224.ihess.com.sunrpc > oac195.ep.hess.com.631: P
1:401(400) ack 45 win 5792 <nop,nop,timestamp 2394357 9309729> (DF) (ttl
62, id 33667, len 452)
13:05:57.563112 oac195.ep.hess.com.631 > beo224.ihess.com.sunrpc: . [tcp
sum ok] 45:45(0) ack 401 win 6432 <nop,nop,timestamp 9309730 2394357>
(DF) (ttl 64, id 13059, len 52)
13:05:57.563370 beo224.ihess.com.sunrpc > oac195.ep.hess.com.631: P
401:517(116) ack 45 win 5792 <nop,nop,timestamp 2394357 9309730> (DF)
(ttl 62, id 33668, len 168)
13:05:57.563397 oac195.ep.hess.com.631 > beo224.ihess.com.sunrpc: . [tcp
sum ok] 45:45(0) ack 517 win 6432 <nop,nop,timestamp 9309730 2394357>
(DF) (ttl 64, id 13060, len 52)
13:05:57.563541 oac195.ep.hess.com.631 > beo224.ihess.com.sunrpc: F [tcp
sum ok] 45:45(0) ack 517 win 6432 <nop,nop,timestamp 9309730 2394357>
(DF) (ttl 64, id 13061, len 52)
13:05:57.563753 beo224.ihess.com.sunrpc > oac195.ep.hess.com.631: F [tcp
sum ok] 517:517(0) ack 46 win 5792 <nop,nop,timestamp 2394357 9309730>
(DF) (ttl 62, id 33669, len 52)
13:05:57.563788 oac195.ep.hess.com.631 > beo224.ihess.com.sunrpc: . [tcp
sum ok] 46:46(0) ack 518 win 6432 <nop,nop,timestamp 9309730 2394357>
(DF) (ttl 64, id 13062, len 52)
13:05:57.564273 oac195.ep.hess.com.632 > beo224.ihess.com.32801: udp
116 (DF) (ttl 64, id 0, len 144)
13:06:00.573228 oac195.ep.hess.com.632 > beo224.ihess.com.32801: udp
116 (DF) (ttl 64, id 0, len 144)
13:06:03.583306 oac195.ep.hess.com.632 > beo224.ihess.com.32801: udp
116 (DF) (ttl 64, id 0, len 144)
13:06:06.593368 oac195.ep.hess.com.632 > beo224.ihess.com.32801: udp
116 (DF) (ttl 64, id 0, len 144)
13:06:09.603466 oac195.ep.hess.com.632 > beo224.ihess.com.32801: udp
116 (DF) (ttl 64, id 0, len 144)
13:06:12.613555 oac195.ep.hess.com.632 > beo224.ihess.com.32801: udp
116 (DF) (ttl 64, id 0, len 144)
13:06:15.623927 oac195.ep.hess.com.632 > beo224.ihess.com.32801: udp
116 (DF) (ttl 64, id 0, len 144)
13:06:21.233245 oac195.ep.hess.com.32828 > hacssdc001.ihess.com.domain:
[udp sum ok] 2497+ PTR? 89.1.25.172.in-addr.arpa. [|domain] (DF) (ttl
64, id 5984, len 70)
13:06:21.234162 hacssdc001.ihess.com.domain > oac195.ep.hess.com.32828:
2497 NXDomain* q: PTR? 89.1.25.172.in-addr.arpa. 0/1/0 ns: 172.in-addr
(120) (ttl 126, id 51967, len 148)
13:06:23.076964 oac195.ep.hess.com.929 > beo224.ihess.com.sunrpc: S [tcp
sum ok] 979826568:979826568(0) win 5840 <mss 1460,sackOK,timestamp
9312281 0,nop,wscale 0> (DF) (ttl 64, id 61329, len 60)
13:06:23.077829 beo224.ihess.com.sunrpc > oac195.ep.hess.com.929: S [tcp
sum ok] 994347360:994347360(0) ack 979826569 win 5792 <mss
1460,sackOK,timestamp 2407423 9312281,nop,wscale 0> (DF) (ttl 62, id 0,
len 60)
13:06:23.077890 oac195.ep.hess.com.929 > beo224.ihess.com.sunrpc: . [tcp
sum ok] 1:1(0) ack 1 win 5840 <nop,nop,timestamp 9312281 2407423> (DF)
(ttl 64, id 61330, len 52)
13:06:23.078094 oac195.ep.hess.com.929 > beo224.ihess.com.sunrpc: P
1:45(44) ack 1 win 5840 <nop,nop,timestamp 9312281 2407423> (DF) (ttl
64, id 61331, len 96)
13:06:23.078407 beo224.ihess.com.sunrpc > oac195.ep.hess.com.929: . [tcp
sum ok] 1:1(0) ack 45 win 5792 <nop,nop,timestamp 2407424 9312281> (DF)
(ttl 62, id 13665, len 52)
13:06:23.078892 beo224.ihess.com.sunrpc > oac195.ep.hess.com.929: P
1:401(400) ack 45 win 5792 <nop,nop,timestamp 2407424 9312281> (DF) (ttl
62, id 13666, len 452)
13:06:23.078928 oac195.ep.hess.com.929 > beo224.ihess.com.sunrpc: . [tcp
sum ok] 45:45(0) ack 401 win 6432 <nop,nop,timestamp 9312281 2407424>
(DF) (ttl 64, id 61332, len 52)
13:06:23.079184 beo224.ihess.com.sunrpc > oac195.ep.hess.com.929: P
401:517(116) ack 45 win 5792 <nop,nop,timestamp 2407424 9312281> (DF)
(ttl 62, id 13667, len 168)
13:06:23.079214 oac195.ep.hess.com.929 > beo224.ihess.com.sunrpc: . [tcp
sum ok] 45:45(0) ack 517 win 6432 <nop,nop,timestamp 9312281 2407424>
(DF) (ttl 64, id 61333, len 52)
13:06:23.079312 oac195.ep.hess.com.929 > beo224.ihess.com.sunrpc: F [tcp
sum ok] 45:45(0) ack 517 win 6432 <nop,nop,timestamp 9312281 2407424>
(DF) (ttl 64, id 61334, len 52)
13:06:23.079541 beo224.ihess.com.sunrpc > oac195.ep.hess.com.929: F [tcp
sum ok] 517:517(0) ack 46 win 5792 <nop,nop,timestamp 2407424 9312281>
(DF) (ttl 62, id 13668, len 52)
13:06:23.079593 oac195.ep.hess.com.929 > beo224.ihess.com.sunrpc: . [tcp
sum ok] 46:46(0) ack 518 win 6432 <nop,nop,timestamp 9312281 2407424>
(DF) (ttl 64, id 61335, len 52)
13:06:23.079669 oac195.ep.hess.com.930 > beo224.ihess.com.32801: udp
116 (DF) (ttl 64, id 0, len 144)
13:06:23.085816 beo224.ihess.com.32801 > oac195.ep.hess.com.930: udp 56
(DF) (ttl 62, id 0, len 84)
13:06:23.085993 oac195.ep.hess.com.932 > beo224.ihess.com.sunrpc: udp
56 (DF) (ttl 64, id 0, len 84)
13:06:23.086453 beo224.ihess.com.sunrpc > oac195.ep.hess.com.932: [udp
sum ok] udp 28 (DF) (ttl 62, id 0, len 56)
13:06:23.086774 oac195.ep.hess.com.2754784087 > beo224.ihess.com.nfs:
112 getattr [|nfs] (DF) (ttl 64, id 0, len 140)
13:06:23.087083 beo224.ihess.com.nfs > oac195.ep.hess.com.2754784087:
reply ok 112 getattr DIR 40755 ids 0/0 [|nfs] (DF) (ttl 62, id 0, len
140)
13:06:23.087182 oac195.ep.hess.com.2771561303 > beo224.ihess.com.nfs:
112 fsstat [|nfs] (DF) (ttl 64, id 0, len 140)
13:06:23.088137 beo224.ihess.com.nfs > oac195.ep.hess.com.2771561303:
reply ok 84 fsstat POST: [|nfs] (DF) (ttl 62, id 0, len 112)
13:06:23.088211 oac195.ep.hess.com.2788338519 > beo224.ihess.com.nfs:
112 fsinfo [|nfs] (DF) (ttl 64, id 0, len 140)
13:06:23.088838 beo224.ihess.com.nfs > oac195.ep.hess.com.2788338519:
reply ok 80 fsinfo POST: [|nfs] (DF) (ttl 62, id 0, len 108)
13:06:24.778127 oac195.ep.hess.com.2855447383 > beo224.ihess.com.nfs:
144 getattr [|nfs] (DF) (ttl 64, id 0, len 172)
13:06:24.778522 beo224.ihess.com.nfs > oac195.ep.hess.com.2855447383:
reply ok 112 getattr DIR 40755 ids 0/0 [|nfs] (DF) (ttl 62, id 0, len
140)
13:06:29.312363 oac195.ep.hess.com.931 > beo224.ihess.com.sunrpc: udp
56 (DF) (ttl 64, id 0, len 84)
13:06:29.312815 beo224.ihess.com.sunrpc > oac195.ep.hess.com.931: [udp
sum ok] udp 28 (DF) (ttl 62, id 0, len 56)
13:06:29.313040 oac195.ep.hess.com.932 > beo224.ihess.com.32801: udp
116 (DF) (ttl 64, id 0, len 144)
13:06:29.320408 beo224.ihess.com.32801 > oac195.ep.hess.com.932: [udp
sum ok] udp 24 (DF) (ttl 62, id 0, len 52)
tcpdump of things on server (hacssdc001 is dns server)
[root@beo224 nfs]# tcpdump -vvv -r capt
13:05:58.043283 beo224.ihess.com.sunrpc > oac195.ep.hess.com.ipp: S [tcp
sum ok] 947522422:947522422(0) ack 956382498 win 5792 <mss
1460,sackOK,timestamp 2394356 9309729,nop,wscale 0> (DF) (ttl 64, id 0,
len 60)
13:05:58.044239 beo224.ihess.com.sunrpc > oac195.ep.hess.com.ipp: . [tcp
sum ok] 1:1(0) ack 45 win 5792 <nop,nop,timestamp 2394357 9309729> (DF)
(ttl 64, id 33666, len 52)
13:05:58.044502 beo224.ihess.com.sunrpc > oac195.ep.hess.com.ipp: P
1:401(400) ack 45 win 5792 <nop,nop,timestamp 2394357 9309729> (DF) (ttl
64, id 33667, len 452)
13:05:58.044904 beo224.ihess.com.sunrpc > oac195.ep.hess.com.ipp: P
401:517(116) ack 45 win 5792 <nop,nop,timestamp 2394357 9309730> (DF)
(ttl 64, id 33668, len 168)
13:05:58.045343 beo224.ihess.com.sunrpc > oac195.ep.hess.com.ipp: F [tcp
sum ok] 517:517(0) ack 46 win 5792 <nop,nop,timestamp 2394357 9309730>
(DF) (ttl 64, id 33669, len 52)
13:05:58.046899 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47351+ PTR? 21.1.168.192.in-addr.arpa. [|domain] (DF) (ttl
64, id 35062, len 71)
13:05:58.047153 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
47351* q: PTR? 21.1.168.192.in-addr.arpa. 1/0/0
21.1.168.192.in-addr.arpa. (75) (ttl 125, id 48803, len 103)
13:05:58.047842 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47352+ A? oac195.ep.hess.com. [|domain] (DF) (ttl 64, id
35063, len 64)
13:05:58.048068 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
[udp sum ok] 47352* q: A? oac195.ep.hess.com. 1/0/0 oac195.ep.hess.com.
A oac195.ep.hess.com (52) (ttl 125, id 48804, len 80)
13:06:01.056635 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47353+ PTR? 21.1.168.192.in-addr.arpa. [|domain] (DF) (ttl
64, id 36603, len 71)
13:06:01.057847 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
47353* q: PTR? 21.1.168.192.in-addr.arpa. 1/0/0
21.1.168.192.in-addr.arpa. (75) (ttl 125, id 49305, len 103)
13:06:01.058538 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47354+ A? oac195.ep.hess.com. [|domain] (DF) (ttl 64, id
36604, len 64)
13:06:01.059201 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
[udp sum ok] 47354* q: A? oac195.ep.hess.com. 1/0/0 oac195.ep.hess.com.
A oac195.ep.hess.com (52) (ttl 125, id 49307, len 80)
13:06:04.066909 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47355+ PTR? 21.1.168.192.in-addr.arpa. [|domain] (DF) (ttl
64, id 38145, len 71)
13:06:04.067164 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
47355* q: PTR? 21.1.168.192.in-addr.arpa. 1/0/0
21.1.168.192.in-addr.arpa. (75) (ttl 125, id 50033, len 103)
13:06:04.067793 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47356+ A? oac195.ep.hess.com. [|domain] (DF) (ttl 64, id
38145, len 64)
13:06:04.068032 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
[udp sum ok] 47356* q: A? oac195.ep.hess.com. 1/0/0 oac195.ep.hess.com.
A oac195.ep.hess.com (52) (ttl 125, id 50034, len 80)
13:06:07.077610 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47357+ PTR? 21.1.168.192.in-addr.arpa. [|domain] (DF) (ttl
64, id 39686, len 71)
13:06:07.078048 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
47357* q: PTR? 21.1.168.192.in-addr.arpa. 1/0/0
21.1.168.192.in-addr.arpa. (75) (ttl 125, id 50381, len 103)
13:06:07.078786 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47358+ A? oac195.ep.hess.com. [|domain] (DF) (ttl 64, id
39687, len 64)
13:06:07.079025 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
[udp sum ok] 47358* q: A? oac195.ep.hess.com. 1/0/0 oac195.ep.hess.com.
A oac195.ep.hess.com (52) (ttl 125, id 50382, len 80)
13:06:10.087895 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47359+ PTR? 21.1.168.192.in-addr.arpa. [|domain] (DF) (ttl
64, id 41228, len 71)
13:06:10.088319 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
47359* q: PTR? 21.1.168.192.in-addr.arpa. 1/0/0
21.1.168.192.in-addr.arpa. (75) (ttl 125, id 50720, len 103)
13:06:10.088973 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47360+ A? oac195.ep.hess.com. [|domain] (DF) (ttl 64, id
41228, len 64)
13:06:10.089212 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
[udp sum ok] 47360* q: A? oac195.ep.hess.com. 1/0/0 oac195.ep.hess.com.
A oac195.ep.hess.com (52) (ttl 125, id 50721, len 80)
13:06:13.098586 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47361+ PTR? 21.1.168.192.in-addr.arpa. [|domain] (DF) (ttl
64, id 42769, len 71)
13:06:13.099110 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
47361* q: PTR? 21.1.168.192.in-addr.arpa. 1/0/0
21.1.168.192.in-addr.arpa. (75) (ttl 125, id 50994, len 103)
13:06:13.099788 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47362+ A? oac195.ep.hess.com. [|domain] (DF) (ttl 64, id
42770, len 64)
13:06:13.100026 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
[udp sum ok] 47362* q: A? oac195.ep.hess.com. 1/0/0 oac195.ep.hess.com.
A oac195.ep.hess.com (52) (ttl 125, id 50995, len 80)
13:06:16.109364 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47363+ PTR? 21.1.168.192.in-addr.arpa. [|domain] (DF) (ttl
64, id 44311, len 71)
13:06:16.109690 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
47363* q: PTR? 21.1.168.192.in-addr.arpa. 1/0/0
21.1.168.192.in-addr.arpa. (75) (ttl 125, id 51280, len 103)
13:06:16.110378 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47364+ A? oac195.ep.hess.com. [|domain] (DF) (ttl 64, id
44311, len 64)
13:06:16.110654 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
[udp sum ok] 47364* q: A? oac195.ep.hess.com. 1/0/0 oac195.ep.hess.com.
A oac195.ep.hess.com (52) (ttl 125, id 51282, len 80)
13:06:23.562731 oac195.ep.hess.com.929 > beo224.ihess.com.sunrpc: S [tcp
sum ok] 979826568:979826568(0) win 5840 <mss 1460,sackOK,timestamp
9312281 0,nop,wscale 0> (DF) (ttl 62, id 61329, len 60)
13:06:23.562807 beo224.ihess.com.sunrpc > oac195.ep.hess.com.929: S [tcp
sum ok] 994347360:994347360(0) ack 979826569 win 5792 <mss
1460,sackOK,timestamp 2407423 9312281,nop,wscale 0> (DF) (ttl 64, id 0,
len 60)
13:06:23.563629 oac195.ep.hess.com.929 > beo224.ihess.com.sunrpc: . [tcp
sum ok] 1:1(0) ack 1 win 5840 <nop,nop,timestamp 9312281 2407423> (DF)
(ttl 62, id 61330, len 52)
13:06:23.563898 oac195.ep.hess.com.929 > beo224.ihess.com.sunrpc: P
1:45(44) ack 1 win 5840 <nop,nop,timestamp 9312281 2407423> (DF) (ttl
62, id 61331, len 96)
13:06:23.563924 beo224.ihess.com.sunrpc > oac195.ep.hess.com.929: . [tcp
sum ok] 1:1(0) ack 45 win 5792 <nop,nop,timestamp 2407424 9312281> (DF)
(ttl 64, id 13665, len 52)
13:06:23.564163 beo224.ihess.com.sunrpc > oac195.ep.hess.com.929: P
1:401(400) ack 45 win 5792 <nop,nop,timestamp 2407424 9312281> (DF) (ttl
64, id 13666, len 452)
13:06:23.564642 oac195.ep.hess.com.929 > beo224.ihess.com.sunrpc: . [tcp
sum ok] 45:45(0) ack 401 win 6432 <nop,nop,timestamp 9312281 2407424>
(DF) (ttl 62, id 61332, len 52)
13:06:23.564660 beo224.ihess.com.sunrpc > oac195.ep.hess.com.929: P
401:517(116) ack 45 win 5792 <nop,nop,timestamp 2407424 9312281> (DF)
(ttl 64, id 13667, len 168)
13:06:23.564910 oac195.ep.hess.com.929 > beo224.ihess.com.sunrpc: . [tcp
sum ok] 45:45(0) ack 517 win 6432 <nop,nop,timestamp 9312281 2407424>
(DF) (ttl 62, id 61333, len 52)
13:06:23.565012 oac195.ep.hess.com.929 > beo224.ihess.com.sunrpc: F [tcp
sum ok] 45:45(0) ack 517 win 6432 <nop,nop,timestamp 9312281 2407424>
(DF) (ttl 62, id 61334, len 52)
13:06:23.565054 beo224.ihess.com.sunrpc > oac195.ep.hess.com.929: F [tcp
sum ok] 517:517(0) ack 46 win 5792 <nop,nop,timestamp 2407424 9312281>
(DF) (ttl 64, id 13668, len 52)
13:06:23.565284 oac195.ep.hess.com.929 > beo224.ihess.com.sunrpc: . [tcp
sum ok] 46:46(0) ack 518 win 6432 <nop,nop,timestamp 9312281 2407424>
(DF) (ttl 62, id 61335, len 52)
13:06:23.565392 oac195.ep.hess.com.930 > beo224.ihess.com.32801: udp
116 (DF) (ttl 62, id 0, len 144)
13:06:23.566243 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47365+ PTR? 21.1.168.192.in-addr.arpa. [|domain] (DF) (ttl
64, id 48129, len 71)
13:06:23.566703 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
47365* q: PTR? 21.1.168.192.in-addr.arpa. 1/0/0
21.1.168.192.in-addr.arpa. (75) (ttl 125, id 52118, len 103)
13:06:23.567432 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47366+ A? oac195.ep.hess.com. [|domain] (DF) (ttl 64, id
48130, len 64)
13:06:23.567695 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
[udp sum ok] 47366* q: A? oac195.ep.hess.com. 1/0/0 oac195.ep.hess.com.
A oac195.ep.hess.com (52) (ttl 125, id 52119, len 80)
13:06:23.571317 beo224.ihess.com.32801 > oac195.ep.hess.com.930: udp 56
(DF) (ttl 64, id 0, len 84)
13:06:23.571704 oac195.ep.hess.com.932 > beo224.ihess.com.sunrpc: udp
56 (DF) (ttl 62, id 0, len 84)
13:06:23.571965 beo224.ihess.com.sunrpc > oac195.ep.hess.com.932: [udp
sum ok] udp 28 (DF) (ttl 64, id 0, len 56)
13:06:23.572500 oac195.ep.hess.com.2754784087 > beo224.ihess.com.nfs:
112 getattr [|nfs] (DF) (ttl 62, id 0, len 140)
13:06:23.572563 beo224.ihess.com.nfs > oac195.ep.hess.com.2754784087:
reply ok 112 getattr DIR 40755 ids 0/0 [|nfs] (DF) (ttl 64, id 0, len
140)
13:06:23.573032 oac195.ep.hess.com.2771561303 > beo224.ihess.com.nfs:
112 fsstat [|nfs] (DF) (ttl 62, id 0, len 140)
13:06:23.573623 beo224.ihess.com.nfs > oac195.ep.hess.com.2771561303:
reply ok 84 fsstat POST: [|nfs] (DF) (ttl 64, id 0, len 112)
13:06:23.574057 oac195.ep.hess.com.2788338519 > beo224.ihess.com.nfs:
112 fsinfo [|nfs] (DF) (ttl 62, id 0, len 140)
13:06:23.574079 beo224.ihess.com.nfs > oac195.ep.hess.com.2788338519:
reply ok 80 fsinfo POST: (DF) (ttl 64, id 0, len 108)
13:06:25.264215 oac195.ep.hess.com.2855447383 > beo224.ihess.com.nfs:
144 getattr [|nfs] (DF) (ttl 62, id 0, len 172)
13:06:25.264244 beo224.ihess.com.nfs > oac195.ep.hess.com.2855447383:
reply ok 112 getattr DIR 40755 ids 0/0 [|nfs] (DF) (ttl 64, id 0, len
140)
13:06:29.799039 oac195.ep.hess.com.931 > beo224.ihess.com.sunrpc: udp
56 (DF) (ttl 62, id 0, len 84)
13:06:29.799283 beo224.ihess.com.sunrpc > oac195.ep.hess.com.931: [udp
sum ok] udp 28 (DF) (ttl 64, id 0, len 56)
13:06:29.799730 oac195.ep.hess.com.932 > beo224.ihess.com.32801: udp
116 (DF) (ttl 62, id 0, len 144)
13:06:29.800530 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47367+ PTR? 21.1.168.192.in-addr.arpa. [|domain] (DF) (ttl
64, id 51321, len 71)
13:06:29.800938 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
47367* q: PTR? 21.1.168.192.in-addr.arpa. 1/0/0
21.1.168.192.in-addr.arpa. (75) (ttl 125, id 54088, len 103)
13:06:29.801586 beo224.ihess.com.32807 > hacssdc001.ihess.com.domain:
[udp sum ok] 47368+ A? oac195.ep.hess.com. [|domain] (DF) (ttl 64, id
51322, len 64)
13:06:29.801866 hacssdc001.ihess.com.domain > beo224.ihess.com.32807:
[udp sum ok] 47368* q: A? oac195.ep.hess.com. 1/0/0 oac195.ep.hess.com.
A oac195.ep.hess.com (52) (ttl 125, id 54089, len 80)
13:06:29.806875 beo224.ihess.com.32801 > oac195.ep.hess.com.932: [udp
sum ok] udp 24 (DF) (ttl 64, id 0, len 52)
on server
[root@beo224 root]# rpcinfo -p
program vers proto port
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper
100021 1 udp 32769 nlockmgr
100021 3 udp 32769 nlockmgr
100021 4 udp 32769 nlockmgr
100021 1 tcp 32769 nlockmgr
100021 3 tcp 32769 nlockmgr
100021 4 tcp 32769 nlockmgr
100007 2 udp 911 ypbind
100007 1 udp 911 ypbind
100007 2 tcp 915 ypbind
100007 1 tcp 915 ypbind
391002 2 tcp 32770 sgi_fam
100011 1 udp 991 rquotad
100011 2 udp 991 rquotad
100011 1 tcp 994 rquotad
100011 2 tcp 994 rquotad
100003 2 udp 2049 nfs
100003 3 udp 2049 nfs
100003 2 tcp 2049 nfs
100003 3 tcp 2049 nfs
100005 1 udp 32770 mountd
100005 1 tcp 32771 mountd
100005 2 udp 32770 mountd
100005 2 tcp 32771 mountd
100005 3 udp 32770 mountd
100005 3 tcp 32771 mountd
server is running latest nfs-utils rpm for redhat 8.0
193453 Jul 09 12:50 nfs-utils-1.0.1-2.80.i386.rpm
ill be glad to provide any additional info
thanks
--
Jeff Davis
Amerada Hess Corporation
Global IT Technical Computing Infrastructure
Houston, Texas
jdavis@hess.com
Office: 713-609-5436
Mobile: 281-467-9448
http://www.jrdavis.net/
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: round robin dns, multihomed host, nfs mounting issues
2003-07-18 17:31 round robin dns, multihomed host, nfs mounting issues Jeff Davis
@ 2003-07-19 10:34 ` Neil Brown
0 siblings, 0 replies; 6+ messages in thread
From: Neil Brown @ 2003-07-19 10:34 UTC (permalink / raw)
To: Jeff Davis; +Cc: nfs
On July 18, jdavis@hess.com wrote:
> I'm testing out a NFS server which has two interfaces on two different
> subnets. I'm using a single hostname and round robin dns. Clients are
> both RedHat Linux systems.
>
> I can access the primary interface on server via NFS from any system on
> my network. I can only access the second interface from hosts on the
> same subnet. Unfortunately, round robin dns on systems that are not
> local to subnets on either of the server's nics will randomly get one of
> the two nics to access nfs fs through.
>
> int 1 - 192.168.19.224
> int 2 - 172.25.2.106
>
> # can mount through int 1 from any host\
> # can mount thoughh int 2 from same ip subnet as int 2
> # cannot mount throught int 2 from remote ip subnets
> # on local subnets, mounts work as desired through correct, optimal
> interface on nfs server
>
> # on remote subnets, round robin directs ~50% of mount requests
> to server through int 2 which fail
>
> why doesn't this work?
Looks like you've hit a glibc bug that was only fixed relatively
recently (27th Feb 2003. glibc version 2.3.2 or 2.3.3 I think).
When mountd is sending it's reply, it uses sendmsg and insists that the
reply goes out the same interface that the request came in on. If
that interface doesn't have a route to the client, you lose.
I worked around it by putting a default route on all my interfaces.
> upgrading to nfs-utils 1.05 seems to have helped
I doubt that it really did, but if it works now, great.
NeilBrown
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: round robin dns, multihomed host, nfs mounting issues
@ 2003-09-22 19:50 Jeff Davis
0 siblings, 0 replies; 6+ messages in thread
From: Jeff Davis @ 2003-09-22 19:50 UTC (permalink / raw)
To: nfs
Client ip - 172.25.1.108
Server eth0 - 172.25.2.120 (default gateway 172.25.2.119)
Server eth1 - 192.168.19.221
No firewall
OOT:beo408:/root# ps -ef | grep ipchain
root 15474 13106 0 13:53 pts/0 00:00:00 grep ipchain
ROOT:beo408:/root# ps -ef | grep iptable
root 15476 13106 0 13:54 pts/0 00:00:00 grep iptable
ROOT:beo408:/root# lsmod | grep ip
ROOT:beo408:/root#
No /etc/hosts.allow or /etc/hosts.deny entries on server
rpcinfo -p localhost (on server)
program vers proto port
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper
100021 1 udp 32768 nlockmgr
100021 3 udp 32768 nlockmgr
100021 4 udp 32768 nlockmgr
100007 2 udp 630 ypbind
100007 1 udp 630 ypbind
100007 2 tcp 633 ypbind
100007 1 tcp 633 ypbind
100024 1 udp 836 status
100024 1 tcp 843 status
100001 3 udp 850 rstatd
100001 2 udp 850 rstatd
100001 1 udp 850 rstatd
100011 1 udp 748 rquotad
100011 2 udp 748 rquotad
100011 1 tcp 751 rquotad
100011 2 tcp 751 rquotad
100003 2 udp 2049 nfs
100003 3 udp 2049 nfs
100005 1 udp 833 mountd
100005 1 tcp 849 mountd
100005 2 udp 833 mountd
100005 2 tcp 849 mountd
100005 3 udp 833 mountd
100005 3 tcp 849 mountd
ROOT:beo408:/root# cat /etc/hosts.deny
#
# hosts.deny This file describes the names of the hosts which are
# *not* allowed to use the local INET services, as decided
# by the '/usr/sbin/tcpd' server.
#
# The portmap line is redundant, but it is left to remind you that
# the new secure portmap uses hosts.deny and hosts.allow. In particular
# you should know that NFS uses portmap!
ROOT:beo408:/root# cat /etc/hosts.allow
#
# hosts.allow This file describes the names of the hosts which are
# allowed to use the local INET services, as decided
# by the '/usr/sbin/tcpd' server.
#
Non-local subnet client trying to talk to server eth1 interface
ROOT:beo408:/root# rpcinfo -u 192.168.19.221 mountd 3
rpcinfo: RPC: Port mapper failure - RPC: Timed out
program 100005 version 3 is not available
ROOT:beo408:/root# rpcinfo -u 192.168.19.221 mountd 3
rpcinfo: RPC: Port mapper failure - RPC: Timed out
program 100005 version 3 is not available
ROOT:beo408:/root# host beo408
beo408.ep.hess.com has address 172.25.1.108
ROOT:beo408:/root# rpcinfo -u 172.25.2.120 mountd 3
program 100005 version 3 ready and waiting
ROOT:beo408:/root# host 172.25.2.120
120.2.25.172.in-addr.arpa domain name pointer lfscluster01.ep.hess.com.
ROOT:beo408:/root# host 192.168.19.221
221.19.168.192.in-addr.arpa domain name pointer
lfscluster01.ep.hess.com.
ROOT:beo408:/root# rpcinfo -u 192.168.19.221 mountd 3
rpcinfo: RPC: Port mapper failure - RPC: Timed out
program 100005 version 3 is not available
Local subnet client trying to talk to server eth1 interface
Client ip - 192.168.19.1
Server eth0 - 172.25.2.120 (default gateway 172.25.2.119)
Server eth1 - 192.168.19.221
eo001> host beo001
beo001.ep.hess.com has address 192.168.19.1
beo001> rpcinfo -u 192.168.19.221 mountd 3
program 100005 version 3 ready and waiting
beo001> rpcinfo -u 192.168.19.221 mountd 3
program 100005 version 3 ready and waiting
let's try 172.25.2.120 interface from 192.168.19 subnet
beo001> rpcinfo -u 172.25.2.120 mountd 3
program 100005 version 3 ready and waiting
this works, is it because this is the default gateway?
also, neil mentioned putting default route on each interface?
is this ok?
thanks
previous messages follow
On Saturday July 19, jdavis@hess.com wrote:
>
> Given Neil's comments about possible glibc bug and nfs 1.05, and my
sense that it is working, is it reasonable for me to think its working?
>
> I.e should it work?
Maybe.
It is entirely possible that I mis-diagnosed your problem. If your
NFS server is the only route between the two subnets, I probably did.
However I cannot think of any recent change in nfs-utils that would
affect anything like your problem, but then my memory isn't perfect.
I suggest you test your configuration and if it works, be happy.
When I had the problem I mentioned, I used rpcinfo for testing:
rpcinfo -u $HOSTNAME mountd 3
If run this on a representative sample of clients, using a
representative sample of server IP address, and it always works, then
I guess your problem has gone away
NeilBrown
On July 18, jdavis@hess.com wrote:
> I'm testing out a NFS server which has two interfaces on two different
> subnets. I'm using a single hostname and round robin dns. Clients are
> both RedHat Linux systems.
>
> I can access the primary interface on server via NFS from any system
on
> my network. I can only access the second interface from hosts on the
> same subnet. Unfortunately, round robin dns on systems that are not
> local to subnets on either of the server's nics will randomly get one
of
> the two nics to access nfs fs through.
>
> int 1 - 192.168.19.224
> int 2 - 172.25.2.106
>
> # can mount through int 1 from any host\
> # can mount thoughh int 2 from same ip subnet as int 2
> # cannot mount throught int 2 from remote ip subnets
> # on local subnets, mounts work as desired through correct, optimal
> interface on nfs server
>
> # on remote subnets, round robin directs ~50% of mount requests
> to server through int 2 which fail
>
> why doesn't this work?
Looks like you've hit a glibc bug that was only fixed relatively
recently (27th Feb 2003. glibc version 2.3.2 or 2.3.3 I think).
When mountd is sending it's reply, it uses sendmsg and insists that the
reply goes out the same interface that the request came in on. If
that interface doesn't have a route to the client, you lose.
I worked around it by putting a default route on all my interfaces.
> upgrading to nfs-utils 1.05 seems to have helped
I doubt that it really did, but if it works now, great.
NeilBrown
--
Jeff Davis
Amerada Hess Corporation
Global IT Technical Computing Infrastructure
Houston, Texas
jdavis@hess.com
Office: 713-609-5436
Mobile: 281-467-9448
http://www.jrdavis.net/
-------------------------------------------------------
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Welcome to geek heaven.
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_______________________________________________
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https://lists.sourceforge.net/lists/listinfo/nfs
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: round robin dns, multihomed host, nfs mounting issues
@ 2003-07-20 23:41 Davis, Jeff (Houston)
0 siblings, 0 replies; 6+ messages in thread
From: Davis, Jeff (Houston) @ 2003-07-20 23:41 UTC (permalink / raw)
To: neilb; +Cc: nfs
Nfs server does not provide routing
It default routes through interface 1. Request was getting to server but =
not back to client
the system seems to be working as I hoped once I upgraded rh80 to nfs =
utils 1.05
Thanks for the help
--------------------------
Jeff Davis
Amerada Hess
Global IT Infrastructure
Technical Computing
Houston, Texas
jdavis@hess.com
713-609-5436 (work)
281-467-9448 (cell)
Sent by BlackBerry Wireless Email
-----Original Message-----
From: Neil Brown <neilb@cse.unsw.edu.au>
To: Davis, Jeff (Houston) <jdavis@hess.com>
CC: nfs@lists.sourceforge.net <nfs@lists.sourceforge.net>
Sent: Sun Jul 20 18:32:19 2003
Subject: Re: [NFS] round robin dns, multihomed host, nfs mounting issues
On Saturday July 19, jdavis@hess.com wrote:
>=20
> Given Neil's comments about possible glibc bug and nfs 1.05, and my =
sense that it is working, is it reasonable for me to think its working?
>=20
> I.e should it work?
Maybe.
It is entirely possible that I mis-diagnosed your problem. If your
NFS server is the only route between the two subnets, I probably did. =20
However I cannot think of any recent change in nfs-utils that would
affect anything like your problem, but then my memory isn't perfect.
I suggest you test your configuration and if it works, be happy.
When I had the problem I mentioned, I used rpcinfo for testing:
rpcinfo -u $HOSTNAME mountd 3
If run this on a representative sample of clients, using a
representative sample of server IP address, and it always works, then
I guess your problem has gone away
NeilBrown
-------------------------------------------------------
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With VMware you can run multiple operating systems on a single machine.
WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines at the
same time. Free trial click here: http://www.vmware.com/wl/offer/345/0
_______________________________________________
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https://lists.sourceforge.net/lists/listinfo/nfs
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: round robin dns, multihomed host, nfs mounting issues
2003-07-19 13:07 Davis, Jeff (Houston)
@ 2003-07-20 23:32 ` Neil Brown
0 siblings, 0 replies; 6+ messages in thread
From: Neil Brown @ 2003-07-20 23:32 UTC (permalink / raw)
To: Davis, Jeff (Houston); +Cc: nfs
On Saturday July 19, jdavis@hess.com wrote:
>
> Given Neil's comments about possible glibc bug and nfs 1.05, and my sense that it is working, is it reasonable for me to think its working?
>
> I.e should it work?
Maybe.
It is entirely possible that I mis-diagnosed your problem. If your
NFS server is the only route between the two subnets, I probably did.
However I cannot think of any recent change in nfs-utils that would
affect anything like your problem, but then my memory isn't perfect.
I suggest you test your configuration and if it works, be happy.
When I had the problem I mentioned, I used rpcinfo for testing:
rpcinfo -u $HOSTNAME mountd 3
If run this on a representative sample of clients, using a
representative sample of server IP address, and it always works, then
I guess your problem has gone away
NeilBrown
-------------------------------------------------------
This SF.net email is sponsored by: VM Ware
With VMware you can run multiple operating systems on a single machine.
WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines at the
same time. Free trial click here: http://www.vmware.com/wl/offer/345/0
_______________________________________________
NFS maillist - NFS@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nfs
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: round robin dns, multihomed host, nfs mounting issues
@ 2003-07-19 13:07 Davis, Jeff (Houston)
2003-07-20 23:32 ` Neil Brown
0 siblings, 1 reply; 6+ messages in thread
From: Davis, Jeff (Houston) @ 2003-07-19 13:07 UTC (permalink / raw)
To: neilb; +Cc: nfs
Given Neil's comments about possible glibc bug and nfs 1.05, and my =
sense that it is working, is it reasonable for me to think its working?
I.e should it work?
Thx...jeff
--------------------------
Jeff Davis
Amerada Hess
Global IT Infrastructure
Technical Computing
Houston, Texas
jdavis@hess.com
713-609-5436 (work)
281-467-9448 (cell)
Sent by BlackBerry Wireless Email
-----Original Message-----
From: Neil Brown <neilb@cse.unsw.edu.au>
To: Davis, Jeff (Houston) <jdavis@hess.com>
CC: nfs@lists.sourceforge.net <nfs@lists.sourceforge.net>
Sent: Sat Jul 19 05:34:21 2003
Subject: Re: [NFS] round robin dns, multihomed host, nfs mounting issues
On July 18, jdavis@hess.com wrote:
> I'm testing out a NFS server which has two interfaces on two different
> subnets. I'm using a single hostname and round robin dns. Clients are
> both RedHat Linux systems.
>=20
> I can access the primary interface on server via NFS from any system =
on
> my network. I can only access the second interface from hosts on the
> same subnet. Unfortunately, round robin dns on systems that are not
> local to subnets on either of the server's nics will randomly get one =
of
> the two nics to access nfs fs through.=20
>=20
> int 1 - 192.168.19.224
> int 2 - 172.25.2.106
>=20
> # can mount through int 1 from any host\
> # can mount thoughh int 2 from same ip subnet as int 2
> # cannot mount throught int 2 from remote ip subnets
> # on local subnets, mounts work as desired through correct, optimal
> interface on nfs server
>=20
> # on remote subnets, round robin directs ~50% of mount requests
> to server through int 2 which fail
>=20
> why doesn't this work?
Looks like you've hit a glibc bug that was only fixed relatively
recently (27th Feb 2003. glibc version 2.3.2 or 2.3.3 I think).
When mountd is sending it's reply, it uses sendmsg and insists that the
reply goes out the same interface that the request came in on. If
that interface doesn't have a route to the client, you lose.
I worked around it by putting a default route on all my interfaces.
> upgrading to nfs-utils 1.05 seems to have helped
I doubt that it really did, but if it works now, great.
NeilBrown
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^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2003-09-22 19:50 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2003-07-18 17:31 round robin dns, multihomed host, nfs mounting issues Jeff Davis
2003-07-19 10:34 ` Neil Brown
2003-07-19 13:07 Davis, Jeff (Houston)
2003-07-20 23:32 ` Neil Brown
2003-07-20 23:41 Davis, Jeff (Houston)
2003-09-22 19:50 Jeff Davis
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