Multi-Tech Systems MTASR1-100 - Manual (Page 48)

MTASR1-100 Owner’s Manual
48
IP Port Remote Address = [dotted decimal IP address]
Defines the IP address for the destination end of a point to point link. This parameter is only necessary if the
specified WAN port has been enabled for operation under point to point mode. This field has no meaning
when the Ethernet port is selected. The Ethernet port is not a point-to-point link. See IP Port Point-to-Point
Link.
IP Port Support Proxy ARP = [enabled | disabled]
Enables Proxy ARP services that are provided to the specified port.
Some nodes (like routers) in an IP network can usually behave as proxies for distant (reachable only through
routers or bridges) nodes replying to ARP requests on behalf of the distant nodes. The RouteFinder can
behave in this manner and provide a Proxy ARP service. The idea is to reduce link traffic on slow links
through which the distant node can be reached.
This field is turned off for WAN ports.
IP Port Support ICMP Redirect = [enabled | disabled]
Defines if the specified port is permitted to issue an ICMP Redirect message to the source IP address.
Internet Control Message Protocol (ICMP) is used in IP networks as an internal protocol for nodes to exchange
control and diagnostic information. Applications normally will not use ICMP for any purpose.
The most prominent cause of this message is the delivery of a datagram to a router not on the forwarding path
to the destination address. This is often due to a wrong configuration of the IP client sending the datagram.
The packet causing the ICMP Redirect message to be transmitted is forwarded to the appropriate router.
Recommended value: enabled
IP Port Support RIP = [enabled | disabled]
Enables IP RIP based routing on the specified port. RIP based routing should normally be enabled. This can
be disabled in case you are using WAN links in Dial-On-Demand mode. In these links, disabling RIP will
reduce traffic on the link as this will also disable periodic RIP broadcasts. RIP routing on the port will be
automatically turned off when Dial-On-Demand is enabled in PPP port setup.
IP Routing Information Protocol (RIP) is a protocol used among routers to exchange routing table information.
RIP is the most common protocol used in both IP and IPX networks. RIP is also used internally by client
workstations in IPX networks to obtain routes (shortest or otherwise) to any distant network.
Routing Tables are tables maintained in each IP or IPX router that maintains information on how to reach
known networks and the cost (or hop) of reaching the network. In other words, the routing table has
information that tells which outgoing port a packet should be put on to reach the destination network
addressed in the packet. Routers use some protocol (usually RIP) to broadcast their routing tables on the
internetwork. Routers receiving such broadcasts, update their tables to build up a full picture of all networks
on the internetwork of LANs.
The RouteFinder can be instructed to hangup a WAN connection if there is no data going across the network.
Later, ON Demand, the link can be brought up automatically when data is available for the network.
When Dial-On-Demand is enabled, the RouteFinder will automatically:
1. Enable SPX spoofing
2. Enable IPX watchdog spoofing
3. Enable Novell Serialization packet filtering
4. Disable the IPX RIP table aging (sets the RIP age timer to zero)
5. Disables the IPX SAP table aging (sets the SAP age timer to zero)
6. Disables RIP based routing in IP. Now static routing or default routing will have to be used to route IP
packets
7. Disables Spanning Tree Bridging
Disabling Dial-On-Demand resets the RIP and SAP aging timers to their default values. However, all other
parameters are left as is. The user will have to specifically change them if desired. In other words, enabling
and disabling Dial-On-Demand is not quite reversible.