Vpi & Vci; Multiplexing; Vc-Based Multiplexing; Llc-Based Multiplexing - ZyXEL Communications Prestige 641 User Manual

Prestige 641 ADSL Internet Access Router
Follow the instructions in the following table to configure TCP/IP parameters for the Ethernet port.
Field
TCP/IP Setup
IP
Address
IP Subnet Mask Your Prestige will automatically calculate the subnet mask based
RIP
Direction
Version Press the space bar to select the RIP version from RIP-1/RIP-
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.
3.6 VPI & VCI
Be sure to use the correct Virtual Path Identifier (VPI) and Virtual Channel Identifier (VCI) numbers
supplied by the Telephone Company. Please see VPI & VCI in Appendix B for more information.
3.7

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.
3.7.1

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.
3.7.2

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
3-6

Table 3-2 TCP/IP Ethernet Setup Menu Fields

Description
Enter the (LAN) IP address of your Prestige in dotted decimal
notation
on the IP address that you assign. Unless you are implementing
subnetting, use the subnet mask computed by the Prestige
Press the space bar to select the RIP direction from Both/In
Only/Out Only or None.
2B/RIP-2M.
Example
192.168.1.1
(default)
255.255.255.0
Both
(default)
RIP-1
(default)
Internet Access