Cabletron Systems MMAC-Plus 9F116-01, User Manual, Page: 217 / 420

Chapter 11
Configuring IP
The IP functions in the Netlink FRX4000, FRX6000, and Frame Relay Module
support routing of IP (internet protocol) traffic among IP devices on LANs and routed
subnetworks, via frame relay or X.25. Routing can be dynamic (RIP versions 1 and 2
are supported), and static routes can be configured.
An FRX/FRM can also be configured to act as a gateway, forwarding IP packets it
receives.
IP functionality also allows support of an SNMP agent in an FRX/FRM. (SNMP con-
figuration is described in Chapter 14.)
IP Addressing
IP devices are identified by IP addresses. An IP address is 32 bits, divided into a
network identifier followed by a host identifier. IP networks are divided into classes,
with this addressing scheme:
●
For Class A networks, bit 0 is
0
, bits 1–7 are the network identifier, and bits 8–
31 are the host identifier.
●
For Class B networks, bits 0–1 are
10
, bits 2–15 are the network identifier, and
bits 16–31 are the host identifier.
●
For Class C networks, bits 0–2 are
110
, bits 3–23 are the network identifier, and
bits 24–31 are the host identifier.
If the host identifier is all zeroes, the overall 32-bit IP address refers specifically to the
network identified by the network identifier. If the host identifier is all ones, the 32-
bit address refers to all hosts attached to the network. (This is the IP broadcast address
for that network.) If the entire 32 bits are ones, the address refers to all hosts on the
local network.
IP addresses are generally shown with each octet represented by a decimal number,
and with octets separated by dots, as in:
130.6.52.245