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For example, each host that connects to this node consumes one connection, each peer node that
receives data from this node consumes one connection, and each peer node that sends data to this
node consumes one connection. The total number of all these connections must not exceed the value
entered for this parameter.
Peer alltime(s)
To reduce network traffic during normal peer-to-peer operation across domains, only those peer
variables that changed are sent to nodes in other domains. However, the processor periodically sends
all of its peer variables to the other nodes in other domains. The peer_alltime parameter specifies how
often these “all peer variable” transfers occur (Valid range: 0 to 21474836 in 1 second increments –
Default value: every 60 seconds).
Domain Peer alltime(s)
To reduce network traffic during normal peer-to-peer operation within a domain, only those peer
variables that changed are sent to the other nodes in the domain. However, the processor periodically
sends all of its domain peer variables to the other nodes in the domain. The domain_peer_alltime
parameter specifies
how often these “all domain peer variable” transfers occur (Valid range: 0 to
21474836 in 1 second increments
– Default value: every 3600 seconds).
Ip route
The IP route parameter is required if the node must respond to communications from a
host located on another network. If all the nodes and hosts reside on the same network, this parameter
is not required and should be left at its default value.
The format of an IP route is composed of three elements, each separated by a space as follows:
destination mask gateway
. The format of each of the three elements is
nnn.nnn.nnn.nnn
, where
nnn
is a number from 0 to 255. Up to five IP routes may be entered in this
parameter, each separated from the other by a space. There are three types of IP routes that may be
added in this parameter: host routes, network routes, and a default route. The routes specify networks
(
destination
AND
mask
) that must be different than the one containing the RTP target node as specified
in the
ipaddress
parameter. Be careful not to enter the
ipaddress
into the
ip route
parameter
The default route is the simplest means to access a host on another network. It takes the
form:
0.0.0.0 0.0.0.0 gateway
, where
gateway
is IP address of the gateway computer, or
router, that connects the target node’s network to the network where the host resides.
(The destination and mask must be 0.0.0.0.) Note that only one default route is allowed in the IP route
parameter. Example: 0.0.0.0 0.0.0.0 10.100.100.65 triplet entry in the ip route parameter to reach all
other networks. In this example, the gateway 10.100.100.65 is in the same network as the RTP target
node, as specified in ipaddress parameter (e.g. 10.10.10.64).
A host route defines one specific host on another network. It takes the form:
destination
255.255.255.255 gateway
, where
destination
is the IP address of the host and
gateway
is the IP
address of the gateway computer connecting the two networks. (The mask must be 255.255.255.255.)
A network route specifies a route to a subnet of hosts which is a route that will match multiple IP
addresses. It takes the form:
destination mask gateway
, where
destination
is the IP address of the
host,
mask
is a subnet mask that masks all but the intended range of addresses, and
gateway
is the IP
address of the gateway computer connecting the two networks. For example, the network route
192.200.100.0 255.255.255.0
gateway
would provide valid routes to all hosts with IP addresses
between 192.200.100.1 and 192.200.100.255 on the network connected by the gateway, or router,
defined by gateway.
The
gateway
, or router, must have an IP address (
gateway
) that is within the same network as specified
in the
ipaddress
configuration parameter.
Note
: Do not change the ip_route parameter for communications in Safety Instrumented Systems.
Safety-critical communication messages (e.g. peer-to-peer messages) should not be routed.
