RE: caSnooper output

["Jeff Hill" <johill@lanl.gov>]

The client library, by default, broadcasts using one subnet limited broadcast address destination for each of the network interfaces on the client’s host. One can examine the network interfaces by typing “ifconfig –a” (on Linux) or ipconfig (on windows). The CA Reference Manual discusses how the network interfaces’ netmask and IP address can be used to determine the network interfaces’ subnet limited broadcast address.

 

And, as Andrew mentions, the CA server (IOC) must be listening on one of these subnets, and one can type “casr 2” to find out which one.  Alternatively, one can use the “ifconfig –a” (on Linux), ipconfig (on windows) , or ifShow (on vxWorks) to find out which ones might be used by default. Also, “netstat –a” (windows and linux) or inetstatShow (vxWorks) will show all of the servers, and what address/port they listen on.

 

Finally, one can use environment variables to manually configure the addresses that the client library might send search messages to. The CA Reference Manual has the gruesome details.

 

Jeff
______________________________________________________
Jeffrey O. Hill           Email        johill@lanl.gov
LANL MS H820              Voice        505 665 1831
Los Alamos NM 87545 USA   FAX          505 665 5107

 

Message content: TSPA

 

From: tech-talk-bounces@aps.anl.gov [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Caizhen Liu
Sent: Friday, January 22, 2010 9:43 AM
To: tech-talk@aps.anl.gov
Subject: caSnooper output

 

Hi,

 

When I use camonitor to check a PV, I get the following error message:

 

[dt100@tsdaq1 ~]$ camonitor ACQ196_310_UPTIME

ACQ196_310_UPTIME              *** Not connected (PV not found)

 

I have checked the IOC server is running properly. Then I try to use caSnooper to trouble-shoot. Here is the result:

 

--------------------------------------------------------------------------------

[dt100@tsdaq1 linux-x86]$ ./caSnooper -t30 -p4 -c0

Starting CaSnooper 2.1.2.1 (8-10-2007) at Jan 22 08:27:18

EPICS 3.14.11

Individual Name is CaSnoop.test

Internal PV names are not being published

 

CaSnooper terminating after 30.01 seconds [0.50 minutes]

  Data collected for 30.01 seconds [0.50 minutes]

 

Jan 22 08:27:48:

There were 20 requests to check for PV existence for 2 different PVs.

  Max(Hz):   0.33

  Mean(Hz):  0.33

  StDev(Hz): 0.33

 

PVs with top 2 requests:

   1 192.168.1.1:44539              ACQ196_310_UPTIME                 0.33

   2 tsdaq1.gat.com:44539           ACQ196_310_UPTIME                 0.33

 

Connection status for top 2 PVs after 10.00 sec:

 

 

Questions:

1)      The IP address 192.168.1.1 and tsdaq1.gat.com of the two requests are the address of the client computer. The computer has two Ethernet port. Are the ip addresses all right?

2)      Should there be a valid request with the default port number 5064 instead of the big number 44539?

 

 

Thank you very much for your help in advance.

 

Caizhen