Compatible Systems 5.4 Manuale Utente
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.
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.
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.
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.
interface.
•
If set to AppleTalk On, then AppleTalk packets received on this inter-
face are routed to the correct interface on the router.
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.
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).
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.
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.
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
already in use on another network segment may cause hard-to-diagnose