Frame Relay Ip Routing - Alcatel Omni Switch/Router User Manual

Frame Relay IP Routing

Frame Relay routing is different than standard
addresses are used as source and destination addresses. In Frame Relay IP Routing, no
addresses are included in a routed frame. In fact, the only address in a routed Frame Relay
frame is the , or virtual circuit identifier. The
DLCI
destination addresses.
Because Frame Relay uses 10-bit
frames require less overhead than
However, due to the nature of
version of the IP protocol. The
sides of a Frame Relay connection. That's why Frame Relay uses the Inverse Address Resolu-
tion Protocol (InARP) to resolve
remote routers.
The InARP protocol ensures that before any data passes between two Frame Relay routers,
those routers notify each other of their IP addresses and associated
communication over a routed Frame Relay network is normally initiated by InARP.
Routing. In normal
LAN IP
is the main indentifier for source and
DLCI
as the main addressing units, routed Frame Relay
DLCIs
frames, which use
LAN IP
on a , Frame Relay routing requires a special
DLCIs WAN
for a single VC may or may not be different on both
DLCI
issues and to automatically learn the IP addresses of
DLCI
–
sends Router a message inform-
WSX
ing of its IP address and
111.22.33.44 on
Frame Relay InARP Protocol
Frame Relay IP Routing
Routing
LAN IP
standard 48-bit addresses.
LAN
. So, the first
DLCIs
("IP
DLCI
24").
DLCI
—
Router returns a message to
with its IP address and
DLCI
222.33.44.55 on 32").
DLCI
Page 29-15
MAC
MAC
WSX
("IP