Figure 28-1 Menu 11 Remote Node Setup; Encapsulation And Multiplexing Scenarios - ZyXEL Communications Prestige 662HW Series User Manual

Prestige 662HW Series User's Guide
Menu 11 - Remote Node Setup
1. MyISP (ISP, SUA)
2. ________
3. ________
4. ________
5. ________
6. ________
7. ________
8. ________
Enter Node # to Edit:

28.2.2 Encapsulation and Multiplexing Scenarios

For Internet access you should use the encapsulation and multiplexing methods used by your ISP.
Consult your telephone company for information on encapsulation and multiplexing methods for
LAN-to-LAN applications, for example between a branch office and corporate headquarters. There
must be prior agreement on encapsulation and multiplexing methods because they cannot be
automatically determined. What method(s) you use also depends on how many VCs you have and how
many different network protocols you need. The extra overhead that 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.
Scenario 1. One VC, Multiple Protocols
PPPoA (RFC-2364) encapsulation with VC-based multiplexing is the best combination because no
extra protocol identifying headers are needed. The PPP protocol already contains this information.
Scenario 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 PPPoA encapsulation instead of RFC-1483, so you do not need to reconfigure
either computer later.
Scenario 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.
28-2

Figure 28-1 Menu 11 Remote Node Setup

Remote Node Configuration