-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Jason Pyeron Sent: Friday, May 23, 2008 2:42 PM
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Paul Heinlein Sent: Friday, May 23, 2008 2:35 PM
On Fri, 23 May 2008, Jason Pyeron wrote:
debug3: Normalising mapped IPv4 in IPv6 address debug3: Trying to reverse map address 192.168.1.80.
paused 7 seconds
Here, obviously, is part of the problem. Your name service isn't answering reverse lookups for your LAN addresses -- or it least it isn't answering them in a timely manner. Fixing that, either through DNS or /etc/hosts, will help a bunch.
[root@192.168.1.21 ~]# date && host 192.168.1.80 && date && host host80.1.internal.pdinc.us && date Fri May 23 13:55:52 EDT 2008 80.1.168.192.in-addr.arpa domain name pointer
host80.1.internal.pdinc.us.
Fri May 23 13:55:52 EDT 2008 host80.1.internal.pdinc.us has address 192.168.1.80 Fri May 23
13:55:52
EDT
2008 [root@192.168.1.21 ~]#
Hmmm, does not take 7 seconds.
User-space utilities like /usr/bin/host don't always provide an accurate reflection of the name services inherited by init- or kernel-launched processes -- especially if the network wasn't (for reasons unknown) fully functional at boot time.
Reboot?
No effect.
I'm still inclined to believe that hostname-lookup issues are involved here; an strace with timestamps might provide a better glimpse of the exact system calls that are timing out.
Like wise, but with local DNS and local IPs humming perfectly?
Weird:
[root@192.168.1.21 ~]# for i in `ip addr show | perl -ne 'm/inet (.+)// and print $1,"\n";'`; do echo try $i && time ssh $i true && echo; done try 127.0.0.1
real 0m0.093s user 0m0.007s sys 0m0.001s
try public_ip_1_in_/etc/sysconfig/network-scripts/ifcfg-eth0
real 0m5.799s user 0m0.005s sys 0m0.005s
try 192.168.1.21
real 0m28.484s user 0m0.007s sys 0m0.003s
try public_ip_2
real 0m28.552s user 0m0.007s sys 0m0.001s
try public_ip_3
real 0m28.503s user 0m0.007s sys 0m0.003s
try 192.168.1.39
real 0m28.559s user 0m0.006s sys 0m0.003s
try 192.168.1.52
real 0m28.487s user 0m0.006s sys 0m0.003s
try 192.168.1.58
real 0m28.489s user 0m0.008s sys 0m0.002s
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