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Prestige P645 ADSL Internet Access Router
4.1.2 Encapsulation & Multiplexing Scenarios
For Internet Access you should use the encapsulation and multiplexing methods used by your ISP. For a
LAN-to-LAN application, e.g., branch office and corporate headquarters, prior mutual agreement on
methods used is necessary because there is no mechanism to automatically determine
encapsulation/multiplexing. Selection of which encapsulation and multiplexing methods to use depends on
how many VCs you have and how many different network protocols you need. The extra overhead that
PPPoE and ENET ENCAP encapsulation entails makes it a poor choice in a LAN-to-LAN application.
Here are some examples of more suitable combinations in such an application.
Scene 1. One VC, Multiple Protocols
PPP (RFC 2364) encapsulation with VC-based multiplexing is the best combination because the extra
protocol identifying headers that LLC-based multiplexing uses are unneeded. The PPP protocol already
contains this information.
Scene 2. One VC, One Protocol (IP)
Selecting RFC-1483 encapsulation with VC-based multiplexing requires the least amount of overhead (0
octets). However, if there is a potential need for multiple protocol support in the future, it may be safer to
select PPP encapsulation instead of RFC-1483, so you don't need to reconfigure when the time comes.
Scene 3. Multiple VCs
If you have an equal number (or more) of VCs than the number of protocols, then select RFC-1483
encapsulation and VC-based multiplexing.
Rem Node Name= ChangeMe
Active= Yes
Encapsulation= PPP
Multiplexing= VC-based
Incoming:
Rem Login=
Rem Password=********
Outgoing:
My Login= oscar
My Password= ********
Authen= CHAP/PAP
Press ENTER to CONFIRM or ESC to CANCEL:
4-2
Menu 11.1 - Remote Node Profile
Route= IP
Bridge= No
Edit PPP Options= No
Rem IP Addr= 0.0.0.0
Edit IP/IPX/Bridge= No
Session Options:
Edit Filter Sets= No
PPPoE Idle Timeout (sec)= N/A
PPPoE Service Name= N/A
Schedule Sets= N/A
Figure 4-2 Menu 11.1 Remote Node Profile
Table 4-1 Remote Node Profile Menu Fields
Enter a unique
name, up to eight
characters, for the
remote node.
Use 0.0.0.0 to
connect to your
ISP or enter the IP
address of the
remote gateway
here.
Remote Node Configuration
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