ZyXEL Communications SBG5500 Series User Manual page 67

Table 14 WAN / Internet > WAN Setup > Add/Edit: Bridge Mode (ADSL over ATM) (continued)
LABEL
Encapsulation
Service
Category
Peak Cell Rate
Sustainable Cell
Rate
Maximum Burst
Size
VLAN
Enable
802.1p
VLAN ID
OK
Cancel
5.3.1.3 IPv6
Click the Add or Edit in the Configuration > WAN / Internet > WAN Setup screen. Click the IPv6 tab to
configure an IPv6 WAN interface connection. This screen is available only when you select IPv6 Only or
IPv4 IPv6 Dualstack in the IPv4 / IPv6 Mode field of the WAN Setup > Add/Edit screen.
Chapter 5 WAN/Internet
DESCRIPTION
Select the method of multiplexing used by your ISP from the drop-down list box. 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 you select
IPoE or PPPoE in the Select DSL Link Type field.
• VC/MUX: In VC multiplexing, each protocol is carried on a single ATM virtual circuit (VC). To
transport multiple protocols, the SBG 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 (Continuous Bit Rate) to specify fixed (always-on) bandwidth for voice or data traffic.
Select VBR-nrt (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 available only when you select CBR, Non Realtime VBR or Realtime VBR.
The Sustainable 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 VBR-nrt 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 ADSL/VDSL over PTM in the Type field.
Select this to add the VLAN Tag (specified below) to the outgoing traffic through this
connection.
IEEE 802.1p defines up to 8 separate traffic types by inserting a tag into a MAC-layer frame that
contains bits to define class of service.
Select the IEEE 802.1p priority level (from 0 to 7) to add to traffic through this connection. The
greater the number, the higher the priority level.
Type the VLAN ID number (from 0 to 4094) for traffic through this connection.
Click OK to save your changes.
Click Cancel to exit this screen without saving.
SBG5500/3310 Series User's Guide
67