Chapter 5 WAN Setup
P-870HN-5xb User’s Guide
78
Figure 32 DSL PTM Interface Configuration
The following table describes the fields in this screen.
Table 12 DSL PTM Interface Configuration
LABEL DESCRIPTION
ATM PVC
Configuration
VPI (Virtual Path Identifier) and VCI (Virtual Channel Identifier) define
a virtual circuit. This section is available only when you configure an
ATM layer-2 interface.
VPI The valid range for the VPI is 0 to 255. Enter the VPI assigned to you.
VCI 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.
Select DSL Link
Type
Select 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 ENET ENCAP (IPoE), PPPoE and
RFC1483/2684 bridging encapsulation methods.
Select PPPoA (PPP over ATM) to allow just one PPPoA connection over
a PVC.
Select IPoA (IP over ATM) to allow just one RFC 1483 routing
connection over a PVC.
Encapsulation
Mode
Select the method of multiplexing used by your ISP from the drop-
down list. Choices are:
• 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.
• 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 EoA in the
Select DSL Link Type field.
• LLC/ENCAPSULATION: More than one protocol can be carried
over the same VC. This is available only when you select PPPoA in
the Select DSL Link Type field.
• LLC/SNAP-ROUTING: 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 EoA in the
Select DSL Link Type field.
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