Compatible-systems 5.4 Manuel d'utilisateur télécharger pdf (Page 86)

80 Chapter 4 - AppleTalk Routing & Bridging

Once you have created a VPN port, you may access the AppleTalk Routing:

VPN Configuration Dialog Box by clicking AppleTalk Routing under the

VPN port’s icon.

A VPN port is a virtual port which handles tunneled traffic. Tunnels are

virtual point-to-point connections through a public network such as the

Internet. All packets sent through a VPN tunnel are IP-encapsulated packets,

including AppleTalk, IPX and even IP packets. This encapsulation is added

or removed, depending on the direction, by “Tunnel Peer” routers. Once a

packet reaches the remote Tunnel Peer, the TCP/IP encapsulation is stripped

off, leaving the original protocol. The unencapsulated packet is then handled

according to the VPN port’s protocol configuration settings. Networks

connected via a tunnel will communicate as if they were on the same network,

even though they are separated by the Internet.

v Note: Remember that you must set up both ends of every tunnel. Therefore,

you must repeat this setup with the remote router.

> AppleTalk On/Bridging/Off

This set of radio buttons controls how AppleTalk packets are handled for this

interface.

• If set to AppleTalk On, then AppleTalk packets received on this inter-

face are routed to the correct interface on the router.

• If set to AppleTalk Bridging, then any AppleTalk packets received on

this interface are forwarded to the router’s internal bridge. This setting

makes this Ethernet interface a member of the “AppleTalk Phase 2

Bridge Group” for this router.

v Note: The AppleTalk Bridging radio button will be grayed out unless

bridging has been turned on globally for the device using the Main Bridging

Configuration Dialog Box (under Global/Bridging) and locally on this inter-

face using the Bridging: VPN Dialog Box (under VPN/Bridging).

• If it is set to AppleTalk Off, then any AppleTalk packets received on this

interface are discarded.

Network Number

If you have set this interface to be a numbered interface, you must provide a

network number to identify the VPN port. This number creates a

“non-extended” AppleTalk network on the VPN port. Acceptable values vary

from 1 to 65,279.

v Note: Accidental selection of an AppleTalk network number which is

already in use on another network segment may cause hard-to-diagnose

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Compatible-systems 5.4 Manuel d'utilisateur Page 86