User's Manual Part 2

Appendix G: CCU/EUM Data Tables
APCD-LM043-8.0 (DRAFT C) 233
Table 48 Basic Routes
In addition to these standard routes, the system operator may add other routes; for example,
routes to support direct CCU-to-CCU communications, without going back to the NAP router.
Each route in the Routing Table has the following entries:
Table 49 Routing Table Entries
Default Route
Any packet with a destination not listed in the Routing Table is forwarded
to the gateway address defined in the default route. Normally, this is be
the IP address of the NAP router. The CCU or EUM generates the default
route automatically when you enter the gateway IP address.
Radio Subnet
Route
Any packet with a destination in the radio subnet (EUMs, end-user PCs)
is forwarded to the CCU radio port. The CCU or EUM generates this
route automatically, using the CCU radio subnet IP address.
Loopback
Route
The loopback interface exists (among other reasons) so the CCU
operating system can talk to itself without handing the packet to a
hardware driver. This route keeps unneeded traffic off the network. The
CCU or EUM generates this loopback route automatically.
Entry Description
Destination The IP address for the destination network.
Mask The subnet mask for the destination network.
TOS
Type of service, for example:
• 0000 Default
• 0001 Minimize monetary cost
• 0010 Maximize reliability
• 0100 Maximize throughput
• 1000 Minimize delay
RFC1700 and RFC1349 recommend TOS settings for various protocols,
including Telnet, FTP, TFTP, ICMP and SNMP.
Gateway
The IP address of the gateway through which to access the destination
network.
Flags Refer to Table 50.
RefCnt
Number of processes currently referencing the route. If a process requires
a route, it looks it up in the Routing Table. When the route is being
referenced by a process,
refcnt will be incremented by one. When the
process is done with the route,
refcnt will be decremented by one.