Sun Microsystems 1.0 User Manual
FDDI Network Topologies
81
7
A Ring of Trees in an Ethernet Network
A ring of trees of the type described on page 77 is attached to an Ethernet
network by connecting your system to one of the concentrators in the main
distribution frame, as shown in Figure 7-9.
network by connecting your system to one of the concentrators in the main
distribution frame, as shown in Figure 7-9.
Figure 7-9
Ring of Trees Attached to an Ethernet Network
Routes in Mixed FDDI/Ethernet Networks
The FDDI/Ethernet IP router is recognized by the IP address and host name of
its FDDI interface by the FDDI network; it is recognized by the IP address and
host name of its Ethernet interface by the Ethernet network. Note that an
FDDI/Ethernet router usually has the same
its FDDI interface by the FDDI network; it is recognized by the IP address and
host name of its Ethernet interface by the Ethernet network. Note that an
FDDI/Ethernet router usually has the same
MAC
address on both networks.
In general, stations in an internetwork can be reached via multiple routes. The
standard routing daemon (
standard routing daemon (
routed
) included in the SunOS determines the
optimum route between stations based on relative hop count, and not on the
speed of the interface. Therefore, in cases where the hop count is equal, the use
of the faster FDDI network is not guaranteed.
speed of the interface. Therefore, in cases where the hop count is equal, the use
of the faster FDDI network is not guaranteed.
DAC
DAC
DAC
Ethernet
FDDI/Ethernet
IP router
FDDI
network