The first method to set up a CLIP with PVCs is to
connect each machine to each other machine in the network via a dedicated PVC. While this
is simple to configure it tends to become impractical for a larger number of machines.
The example supposes that we have four machines in the network, each connected to the
ATM network with an
ATM adapter card.
The first step is the planning of the IP addresses and the ATM connections between the
machines. We use the following:
To build a fully meshed net we need one ATM connection between each pair of
machines:
The VPI and VCI values at each end of the connection may of course differ, but for
simplicity we assume that they are the same. Next we need to configure the ATM interfaces
on each host:
hostA# ifconfig hatm0 192.168.173.1 up
hostB# ifconfig hatm0 192.168.173.2 up
hostC# ifconfig hatm0 192.168.173.3 up
hostD# ifconfig hatm0 192.168.173.4 up
assuming that the ATM interface is hatm0 on all hosts. Now
the PVCs need to be configured on hostA (we assume that they are
already configured on the ATM switches, you need to consult the manual for the switch on
how to do this).
hostA# atmconfig natm add 192.168.173.2 hatm0 0 100 llc/snap ubr
hostA# atmconfig natm add 192.168.173.3 hatm0 0 101 llc/snap ubr
hostA# atmconfig natm add 192.168.173.4 hatm0 0 102 llc/snap ubr
hostB# atmconfig natm add 192.168.173.1 hatm0 0 100 llc/snap ubr
hostB# atmconfig natm add 192.168.173.3 hatm0 0 103 llc/snap ubr
hostB# atmconfig natm add 192.168.173.4 hatm0 0 104 llc/snap ubr
hostC# atmconfig natm add 192.168.173.1 hatm0 0 101 llc/snap ubr
hostC# atmconfig natm add 192.168.173.2 hatm0 0 103 llc/snap ubr
hostC# atmconfig natm add 192.168.173.4 hatm0 0 105 llc/snap ubr
hostD# atmconfig natm add 192.168.173.1 hatm0 0 102 llc/snap ubr
hostD# atmconfig natm add 192.168.173.2 hatm0 0 104 llc/snap ubr
hostD# atmconfig natm add 192.168.173.3 hatm0 0 105 llc/snap ubr
Of course other traffic contracts than UBR can be used given the ATM adapter supports
those. In this case the name of the traffic contract is followed by the parameters of the
traffic. Help for the atmconfig(8) tool can
be obtained with:
# atmconfig help natm add
or in the atmconfig(8) manual
page.
The same configuration can also be done via /etc/rc.conf.
For hostA this would look like:
network_interfaces="lo0 hatm0"
ifconfig_hatm0="inet 192.168.173.1 up"
natm_static_routes="hostB hostC hostD"
route_hostB="192.168.173.2 hatm0 0 100 llc/snap ubr"
route_hostC="192.168.173.3 hatm0 0 101 llc/snap ubr"
route_hostD="192.168.173.4 hatm0 0 102 llc/snap ubr"
The current state of all CLIP routes can be
obtained with:
hostA# atmconfig natm show
