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24 Using Enterprise Edge Services

Enterprise Edge Networking Operations Guide P0910464 Issue 01

Static Routing

Enterprise Edge users can add static routes to the IP routing table. These static

routes take precedence over those routes chosen by routing protocols, such as RIP.

To add a static route, see Static Route on page 94.

Note: Ensure that users do not add a static route for default route 0.0.0.0 with mask

0.0.0.0. Enterprise Edge’s Net Link Manager automatically creates a default

route and adjusts it according to link status unless router or Net Link

Manager are running.

Routing Information Protocol (RIP)

RIP is a widely-used protocol for managing routing information in a self-contained

network such as a corporate intranet. RIP is classified by the Internet Engineering

Task Force (IETF) as one of several internal gateway protocols (IGPs).

A RIP router sends full updates, which list all the other hosts it knows about, to its

closest neighbor host every 30 seconds. The neighbor host sends the information to

its next neighbor, until all the hosts in the network know the routing paths, a state

known as network convergence. RIP uses a hop count to determine network

distance. Each host with a router in the network uses the routing table information

to determine the next host for the packet, until a specified destination is reached.

Enabling RIP on Network Interfaces

To run RIP on one or more network interfaces, go to the specific interface under

router and enable RIP. After you enable RIP for an interface, you do not have to

reboot the Enterprise Edge server for the changes to take effect.

Packet Filtering

A packet is a unit of data routed between an origin and a destination on the Internet

or on any other packet-switched network. When any file such as an e-mail message,

HTML file, GIF file or URL request, is sent on the Internet, the IP layer divides the

file into packets of an efficient size for routing. Each of these packets is numbered

and includes the Internet address of the destination.

Enterprise Edge supports basic (or stateless) packet filtering for IP. You can

configure the filter to pass only the packets from the routes they list, or to pass

everything except the packets for the routes they list.

Each route in the list can be any combination of the following packet filtering

features. By default, no packet filer is configured.

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Avaya EE Networking Guida Utente Pagina 24