Cabletron Systems FRM User Manual - Chapter 13
Chapter 13
Configuring IP
Introduction
The IP functions in the FRM support dynamic routing of IP (internet protocol) traffic
among IP devices on LANs and routed subnetworks, via frame relay or X.25. An FRM
can also be configured to act as a gateway, forwarding IP packets it receives.
IP support includes:
●
RIP versions 1 & 2 (as well as a V1-compatible V2)
●
ICMP
●
ARP, Inverse ARP, Proxy ARP
●
Standard NDIS interfaces for Ethernet, Token Ring, and 802.3 LANs
●
RFC 1490 frame relay and RFC 1356 X.25 interfaces for WANs
●
Ping
●
Configuration of fixed routes
IP Addressing
IP devices are identified by IP addresses. An IP address is 32 bits, divided into a
network identifier followed by a node (host) identifier. This allows the Internet Pro-
tocol to identify each physical network and each node on each physical network. IP
addresses are generally shown in dotted decimal notation, which means that each octet
is represented by a decimal number, and octets are separated by dots, as
in:
130.6.52.245
.
IP networks are divided into classes, with this addressing scheme:
●
Class A allows up to 127 network numbers and several million node numbers:
Bit 0 is
0
, bits 1–7 are the network identifier, and bits 8–31 are the node iden-
tifier. In dotted decimal notation, the range of Class A addresses is
1.0.0.0–
127.255.255.255
.
The valid range in FRM configuration is
1.0.0.0–126.255.255.255
.
Network
Node