Perle 833IS, User Manual

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Chapter 7: Configuring the Protocols
Perle 833IS User Guide 93
In general, it is recommended to define the Internal WAN network distinct from the
LAN network. It is possible to define the Internal WAN network as a subnet of the
LAN network, but there are limitations:
■
Routers on the LAN using RIP V1 cannot discover the Internal WAN network,
and will not be able to route to the dial in clients on the Internal WAN network.
■
DHCP is not supported for dial in clients in this mode.
Defining the Internal WAN network as a subnet can still be useful if:
■
Routers on the LAN use RIP V2. RIP V2 sends subnet information and any
routers on the LAN network using RIP2 will be learned.
■
All WAN traffic uses the configured default gateway.
■
Static routes are defined.
■
The "Enable Proxy ARP" setting is used.
Directed IP traffic from a dial in client will reach another dial in client in the same
833IS. However, IP broadcasts from a dial in client will not reach another dial in
client. Most applications will work, but IP applications that rely on broadcast or
multicast messages (such as NetBEUI over IP) are not supported.
If a router dials in to the WAN, the 833IS can route traffic from the dial in router to
the LAN. This feature is referred to as "LAN-to-LAN". Note that it is not possible
to route from this dial in router to a client or router on the Internal WAN network.
Most organizations have a department or individual responsible for IP address
management. Consult with them to get the correct values.