Editing The Routing Table - R&S M3SR 4100 Series Operating Manual

M3SR Series 4100
5.3.3.10

Editing the Routing Table

Unicast Routing Basics
The entries in the routing table define where to forward incoming IP data to. Basically, a rout-
ing entry consists of a network (specified by IP address and netmask) and a gateway. When
the destination IP address of an incoming packet matches the network of a routing entry, it
is forwarded to the specified gateway. The radio chooses automatically the proper outgoing
IP interface, i.e. if the gateway is in the range of the air IP network, the air IP interface is used
as output IP interface.
Therefore, the IP address of the gateway must be reachable directly by the radio and thus
should reside in the range of the Ethernet, air or PPP (point-to-point protocol) IP interface.
Radio1
Routing Table
Radio2
Routing Table
• Radio1 needs a route to forward packets destined to PC2 (192.168.150.2). The gateway
for this route is Radio2 (192.168.200.2) which is reachable by Radio1 over the air IP in-
terface.
• Radio2 needs a route to forward packets destined to PC1 (192.168.140.2). The gateway
for this route is Radio1 (192.168.200.1) which is reachable by radio Radio2 over its air
IP interface.
• There are no explicit routes necessary to route packets from one IP interface to another,
e.g. Radio2 can forward packets for PC2 automatically from the Air IP interface to the
Ethernet IP interface.
The necessary routing configuration of PC1 and PC2 is omitted.
Operating Manual 6175.4760.02 – 01
Air IP: 192.168.200.1
IP Address
192.168.150.2
Air IP: 192.168.200.2
IP Address
192.168.140.2
Editing the Routing Table
Netmask
255.255.255.0
Netmask
255.255.255.0
Gateway
192.168.200.2
Gateway
192.168.200.1
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