No route to host

[黄思婷 <siting@sinap.ac.cn>]

Title: No route to host

Hello,

When I'm using "caget" in a PC No.1 to read data in PC No.2,  the following message displayed:
*********************************************************************************
CAC: Unable to connect because "No route to host"
CA.Client.Exception...............................................
    Warning: "Virtual circuit disconnect"
    Context: "10.10.254.124:5064"
    Source File: ../cac.cpp line 1126
    Current Time: Mon Sep 01 2008 11:04:15.122863235
..................................................................
Channel connect timed out: 'SR-BI:ConfCal' not found.

A call to "assert (_pTargetMutex == & mutexToVerify)" failed in ../../../include/epicsGuard.h line 84.
EPICS Release EPICS R3.14.9 $R3-14-9$ $2007/02/05 16:31:45$.
Current time Mon Sep 01 2008 11:04:16.091265952.
Please E-mail this message to Jeff Hill johill@lanl.gov or to tech-talk@aps.anl.gov
Calling epicsThreadSuspendSelf()
*************************************************************************************


If using "caget" in a PC No.3 to read data in PC No.2,  the following message displayed:
*************************************************************************************
CAC: Unable to connect because "No route to host"
CA.Client.Exception...............................................
    Warning: "Virtual circuit disconnect"
    Context: "10.10.254.124:5064"
    Source File: ../cac.cpp line 1142
    Current Time: Mon Sep 01 2008 12:29:01.861896000
..................................................................
Channel connect timed out: 'SR-BI:ConfCal' not found.
***************************************************************************************

Here is the basic information:
PC No.1
linux kernel:   2.6.23.1-42.fc8
epics_base version:  3.14.9

PC No.2
linux kernel:   2.6.9-42.0.3.EL
epics_base version:  3.14.8.2

PC No.3
linux kernel:   2.6.11-1.1369_FC4
epics_base version:  3.14.8.2

I have used "export EPICS_CA_ADDR_LIST" command in both PC No.1 & 3 , and the IOC runs normally in PC No.2.

How can I solve this problem?
Thank you.