User's Manual Part 1

Configuration MeshMAX 5054 Series User Guide
Configuring the Subscriber Module
95
RIP Notes
• Ensure that routers on the same physical network are configured to use the same version of RIP.
• Routing updates occur every 30 seconds. It may take up to 3 minutes for a route that has gone down to timeout in a
routing table.
• RIP is limited to networks with 15 or fewer hops.
NAT (Routing Mode Only)
The NAT (Network Address Translation) feature lets hosts on the Ethernet side of the SU transparently access the public
network through the BSU. All hosts in the private network can have simultaneous access to the public network.
NOTE: The NAT tab is available for SUs in Routing mode only. The SU supports NAPT (Network Address Port
Translation) where all private IP addresses are mapped to a single public IP address, and does not support Basic
NAT (where private IP addresses are mapped to a pool of public IP addresses).
Both dynamic mapping (allowing private hosts to access hosts in the public network) and static mapping (allowing
public hosts to access hosts in the private network) are supported.
• In dynamic mapping, the SU maps the private IP addresses and its transport identifiers to transport identifiers of a
single Public IP address as they originate sessions to the public network. This is used only for outbound access.
• Static mapping is used to provide inbound access. The SU maps a private IP address and its local port to a fixed
public port of the global IP address. This is used to provide inbound access to a local server for hosts in the public
network. Static port mapping allows only one server of a particular type. Up to 1000 ports (500 UDP and 500 TCP) are
supported.