Hi there,
We have a couple of Solaris 10 branded zones in a Solaris 11.1 environment.
I'm experiencing a weird problem whereby occasionally, when we try to open connections on various sockets to other servers (ssh, telnet, ftp, mysql to name a few) we get the following type of error;
--start snip
telnet: Unable to connect to remote host: Cannot assign requested address
--end snip
But if you try again immediately, it will always work ... I have attempted to overcome this with cronjobs calling hosts every 5 minutes for example incase that helped, but it doesn't.. it is just completely random...
This only happens occasionally (for example, if you connect to a host say 100 times a day, maybe 2 of them will have this problem) ... but its causing enough of a problem that we're starting to see an impact on software behaviour (i.e. orders not being sent to other hosts)...
Netstat shows that at most, we're dealing with about 2000 connections at any one point (includes waits, listeners, estabs) ...
Here's some base info:
Global - Sparc T4-1
root@sdc-t41-2:~# more /etc/*release*
Oracle Solaris 11.2 SPARC
Copyright (c) 1983, 2015, Oracle and/or its affiliates. All rights reserved.
Assembled 17 March 2015
Zone:
genesys sphw /home/sphw> uname -a
SunOS genesys 5.10 Generic_Virtual sun4v sparc sun4v
genesys sphw /home/sphw> more /etc/*release*
Oracle Solaris 10 1/13 s10s_u11wos_24a SPARC
Copyright (c) 1983, 2013, Oracle and/or its affiliates. All rights reserved.
Assembled 17 January 2013
genesys sphw /home/sphw>
genesys sphw /home/sphw> ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
inet 127.0.0.1 netmask ff000000
vnicZBI59674299: flags=100001000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4,PHYSRUNNING> mtu 1500 index 2
inet 10.1.1.19 netmask ffff0000 broadcast 10.1.255.255
genesys sphw /home/sphw>
Let me know if you need any more information.... Just looking for any sort of advice on what I could do to either overcome this problem, or to investigate it and find the cause.
Thanks!
Regards
HUgo