User's Manual

Chapter 6 WAN Setup

P-660H-T1v3s User’s Guide

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, for example, if charging heavily

depends on the number of simultaneous VCs.

6.4.3 VPI and VCI

Be sure to use the correct Virtual Path Identifier (VPI) and Virtual Channel

Identifier (VCI) numbers assigned to you. The valid range for the VPI is 0 to 255

and for the VCI is 32 to 65535 (0 to 31 is reserved for local management of ATM

traffic). Please see the appendix for more information.

6.4.4 IP Address Assignment

A static IP is a fixed IP that your ISP gives you. A dynamic IP is not fixed; the ISP

assigns you a different one each time. The Single User Account feature can be

enabled or disabled if you have either a dynamic or static IP. However the

encapsulation method assigned influences your choices for IP address and ENET

ENCAP gateway.

IP Assignment with PPPoA or PPPoE Encapsulation

If you have a dynamic IP, then the IP Address and Gateway IP Address fields

are not applicable (N/A). If you have a static IP, then you only need to fill in the IP

Address field and not the Gateway IP Address field.

IP Assignment with RFC 1483 Encapsulation

In this case the IP address assignment must be static.

IP Assignment with ENET ENCAP Encapsulation

In this case you can have either a static or dynamic IP. For a static IP you must fill

in all the IP Address and Gateway IP Address fields as supplied by your ISP.

However for a dynamic IP, the P-660H-T1v3s acts as a DHCP client on the WAN

port and so the IP Address and Gateway IP Address fields are not applicable

(N/A) as the DHCP server assigns them to the P-660H-T1v3s.

6.4.5 Keep Alive/Nailed-Up Connection (PPP)

A nailed-up connection is a dial-up line where the connection is always up

regardless of traffic demand. The P-660H-T1v3s does two things when you specify