epics/pcas
0
0
Fork 0
Code Issues Pull Requests Projects Wiki Activity

added addl comments

Browse Source
This commit is contained in:
Jeff Hill
1998-04-10 22:59:37 +00:00
parent 9e10969c81
commit b5f7ea85b4
1 changed files with 33 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
config/CONFIG_ENV
View File

@@ -56,7 +56,7 @@ EPICS_CA_SERVER_PORT=5064
# point to point interfaces) of the corresponding interfaces
# will be accepted by the server. If this parameter is empty
# then TCP/IP connections are accepted from any interface
# (and any search messages addresed to the host are accepted).
# (and any search messages addressed to the host are accepted).
# Beacons are sent only to the broadcast address of each interface
# in this list (or the destination address of point to point
# interfaces) if EPICS_CA_AUTO_ADDR_LIST is YES.
@@ -79,6 +79,38 @@ EPICS_CA_SERVER_PORT=5064
# using the user specified UDP port number, but will be connecting to
# the servers using whatever TCP port has been assigned.
#
# If experiencing trouble getting clients to connect
# --------------------------------------------------
#
# o Make sure that the broadcast addresses are identical on the
# server's host and on the client's host. This can be checked with
# "netstat -i" or "ifconfig -a".
#
# o Make sure that the client and server are using the same UDP
# port. Check the server's port by running "netstat -a | grep nnn"
# where nnn is the port number involved. If you do not set
# EPICS_CA_SERVER_PORT or EPICS_CAS_SERVER_PORT
# then the default port will be 5064.
#
# o Two servers can run on the same host with the same server port number
# if the following restrictions are understood (good luck). If the host has a
# modern IP kernel it is possible to have two servers on the same UDP port.
# It is not possible for two servers to run on the same host using the same
# TCP IP server port. If the CA server library detects that a 2nd server is attempting
# to start on the same port as an existing CA server then both servers will use the
# same UDP port if it is a modern IP kernel, and the 2nd server will
# be allocated a new TCP port. In this situation the clients will still be
# configured to use the same port number for both servers. The clients
# will find the 2nd server via the shared UDP port, and transparently
# connect to the 2nd server's allocated TCP port. Be aware that If there are
# two server's running on the same host on the same UDP port then they will
# both receive all UDP search requests sent as broadcasts, but will unfortunately (due to
# what I consider to be a real weakness of most IP kernel implementations) only one
# of the servers will typically receive UDP search requests sent to unicast addresses (i.e.
# a specific host's ip address).
#
EPICS_CA_BEACON_PERIOD=15.0
EPICS_CAS_INTF_ADDR_LIST=""
EPICS_CAS_BEACON_ADDR_LIST=""