ZyXEL Communications P-2812HNU-51c User Manual page 109

Table 11 Broadband Add/Edit: Routing- IPoE (ADSL) (continued)
LABEL
IPv6/IPv4
DualStack
ATM PVC
Configuration
VPI
VCI
DSL Link Type
Encapsulation
Mode
Service Category
Peak Cell Rate
Sustainable Cell
Rate
Maximum Burst
Size
IP Address
P-2812HNU(L)-Fx Series User's Guide
DESCRIPTION
Select Enable to allow the Device to run IPv4 and IPv6 at the same time. If
this function is disabled, the Device only runs IPv4.
VPI (Virtual Path Identifier) and VCI (Virtual Channel Identifier) define a virtual
circuit.
This section is available only when you select ADSL in the Type field to
configure an ATM layer-2 interface.
The valid range for the VPI is 0 to 255. Enter the VPI assigned to you.
The valid range for the VCI is 32 to 65535 (0 to 31 is reserved for local
management of ATM traffic). Enter the VCI assigned to you.
The DSL link type is set to EoA (Ethernet over ATM) to have an Ethernet
header in the packet, so that you can have multiple services/connections over
one PVC. You can set each connection to have its own MAC address or all
connections share one MAC address but use different VLAN IDs for different
services. EoA supports IPoE, PPPoE and RFC1483/2684 bridging encapsulation
methods.
Select the method of multiplexing used by your ISP from the drop-down list.
Choices are:
• LLC/SNAP-BRIDGING In LCC encapsulation, bridged PDUs are
encapsulated by identifying the type of the bridged media in the SNAP
header. This is available only when the DSL Link Type is set to EoA.
• VC/MUX: In VC multiplexing, each protocol is carried on a single ATM
virtual circuit (VC). To transport multiple protocols, the Device needs
separate VCs. There is a binding between a VC and the type of the network
protocol carried on the VC. This reduces payload overhead since there is no
need to carry protocol information in each Protocol Data Unit (PDU)
payload.
Select UBR Without PCR for applications that are non-time sensitive, such as
e-mail.
Select CBR (Constant Bit Rate) to specify fixed (always-on) bandwidth for voice
or data traffic.
Select Non Realtime VBR (non real-time Variable Bit Rate) for connections
that do not require closely controlled delay and delay variation.
Select Realtime VBR (real-time Variable Bit Rate) for applications with bursty
connections that require closely controlled delay and delay variation.
Divide the DSL line rate (bps) by 424 (the size of an ATM cell) to find the Peak
Cell Rate (PCR). This is the maximum rate at which the sender can send cells.
Type the PCR here.
This field is not available when you select UBR Without PCR.
The Sustain Cell Rate (SCR) sets the average cell rate (long-term) that can be
transmitted. Type the SCR, which must be less than the PCR. Note that system
default is 0 cells/sec.
This field is available only when you select Non Realtime VBR or Realtime
VBR.
Maximum Burst Size (MBS) refers to the maximum number of cells that can be
sent at the peak rate. Type the MBS, which is less than 65535.
This field is available only when you select Non Realtime VBR or Realtime
VBR.
This section is available only when you select Routing in the Mode field and
IPoE in the WAN Service Type field.
Chapter 5 Broadband
109