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TA 850 User Manual © 2001, ADTRAN, Inc.
61200375L1-1
TA 850
T1 RCU VoATM UIG/61200376L2-31A
Page 40 of 72
RIP
Use this menu to enable RIP on the LAN interface.
Proxy ARP
This feature allows the network portion of a group of addresses to be shared among several physical
network segments. The ARP protocol provides a way for devices to create a mapping between physical
addresses and logical IP addresses. Proxy ARP makes use of this mapping feature by instructing a
router to answer ARP requests as a "proxy" for the IP addresses behind one of its ports. The device
which sent the ARP request will then correctly assume that it can reach the requested IP address by
sending packets to the physical address that was returned. This technique effectively hides the fact that
a network has been (further) subnetted. If this option is set to Y
ES
, when an ARP request is received on
the Ethernet port the address is looked up in the IP routing table. If the forwarding port is not on the
Ethernet port and the route is not the default route, the 850 will answer the request with its own hard-
ware address.
MAC Address
This is a read-only MAC address programmed at ADTRAN.
M
ODE
Enables or disables RIP.
P
ROTOCOL
Specifies the RIP protocol. Choices are
V1
(def)
(which is RIP version 1) or
V2
(RIP version 2).
M
ETHOD
Specifies the way the RIP protocol sends out its
advertisements. Choices are given below.
N
ONE
All routes in the router table are advertised
with no modification of the metrics.
S
PLIT
H
ORIZON
(def)
Only routes not learned from this circuit are
advertised.
POISON REVERSE
All routes are advertised, but the routes
learned from this portare “poisoned” with an
infinite metric.
DIRECTION
Allows the direction at which RIP advertise-
ments are sent and listened to be specified.
TX AND RX (def)
RIP advertisements are periodically
transmitted and are listened to on this port.
TX ONLY
RIP advertisements are periodically
transmitted but are not listened to on this
port.
RX O
NLY
RIP advertisements are not transmitted on
this port, but are listened.
V2 S
ECRET
Enter the secret used by RIP version 2 here.