ZyXEL Communications P-660RU-Tx User Manual
Chapter 7 Internet Setup
P-660RU-Tx User’s Guide
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VC-based Multiplexing
In this case, by prior mutual agreement, each protocol is assigned to a specific
virtual circuit; for example, VC1 carries IP, etc. VC-based multiplexing may be
dominant in environments where dynamic creation of large numbers of ATM VCs is
fast and economical.
virtual circuit; for example, VC1 carries IP, etc. VC-based multiplexing may be
dominant in environments where dynamic creation of large numbers of ATM VCs is
fast and economical.
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.
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.
7.3.3 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.
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.
7.3.4 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. However the encapsulation method
assigned influences your choices for IP address.
assigns you a different one each time. However the encapsulation method
assigned influences your choices for IP address.
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.
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.
7.3.5 Always-On Connection (PPP)
An always-on connection is a dial-up line where the connection is always up
regardless of traffic demand. The P-660RU-Tx does two things when you specify
an always-on connection. The first is that idle timeout is disabled. The second is
that the P-660RU-Tx will try to bring up the connection when turned on and
regardless of traffic demand. The P-660RU-Tx does two things when you specify
an always-on connection. The first is that idle timeout is disabled. The second is
that the P-660RU-Tx will try to bring up the connection when turned on and