ZyXEL Communications Prestige 642R Series - Manual (Page 52)

Prestige 642R Series ADSL Router
Internet Access 3-9
space bar to enable IP Multicasting or select None to disable it.
IP Policies Create policies using SMT Menu 25 (see the IP Policy Routing
chapter in Part 3) and apply them on the Prestige LAN interface
here. You can apply up to four IP Policy sets (from twelve) by
entering their numbers here separated by commas, e.g., 2, 4, 7, 9.
Edit IP Alias The Prestige supports three logical LAN interfaces via its single
physical Ethernet interface with the Prestige itself as the gateway for
each LAN network. Press the [SPACEBAR] to toggle No to Yes,
then press [ENTER] to bring you to menu 3.2.1
Yes
No (default)
When you have completed this menu, press [ENTER] at the prompt [Press ENTER to Confirm…] to save
your configuration, or press [ESC] at any time to cancel.
The following terminology may seem a little overwhelming at first to new users of
broadband technology. Relax! This information should be either pre-configured on your
Prestige or supplied by your ISP or telephone company. Think of them as the equivalent of
“telephone numbers” on traditional dial-up PSTN and ISDN modems and routers.
3.9 VPI & VCI
Be sure to use the correct Virtual Path Identifier (VPI) and Virtual Channel Identifier (VCI) numbers
supplied by the telephone company. The valid range for the VPI is 1 to 255 and for the VCI is 32 to 65535 (1
to 31 is reserved for local management of ATM traffic). Please see the Appendices for more information.
3.10 Multiplexing
There are two conventions to identify what protocols the virtual circuit (VC) is carrying. Be sure to use the
multiplexing method required by your ISP.
3.10.1 VC-based multiplexing
In this case, by prior mutual agreement, each protocol is assigned to a specific virtual circuit, e.g., VC1
carries IP, VC2 carries IPX, etc. VC-based multiplexing may be dominant in environments where dynamic
creation of large numbers of ATM VCs is fast and economical.
3.10.2 LLC-based multiplexing
In this case one VC carries multiple protocols with protocol identifying information being contained in each
packet header. Despite the extra bandwidth and processing overhead, this method may be advantageous if it
is not practical to have a separate VC for each carried protocol, e.g., if charging heavily depends on the
number of simultaneous VCs.
3.11 Encapsulation
Be sure to use the encapsulation method required by your ISP. The Prestige supports the following methods.