Patton electronic 4950-NCE manual Setting up permanent virtual circuits PVC, Command Purpose

SmartNode 4950-NCE Getting Started Guide 5 • G.SHDSL Basic Configuration

Setting up permanent virtual circuits (PVC)

The modems currently available are using ATM to multiplex traffic over the DSL framing connection. ATM allows you to have separate logical connections running in parallel. Those connections are called permanent virtual circuits (PVC). All permanent virtual circuits use AAL5 framing.

Table 8. PVC Commands

	Command	Purpose
Step 1	node(prt-dsl)[0/0]# [no] pvc vpi 8 vci 35	Creates PVC 8/35 and enters configuration
		mode for this PVC. The "no"-variant deletes the
		PVC configuration.
Step 2	node(pvc)[8/35]# encapsulation {llcvc}	Sets the encapsulation to be used. Optionally
		select either LLC encapsulation or VC multiplex-
		ing for this PVC.
		Default: llc

Using PVC channels in bridged Ethernet mode

The PVC offers a bridged Ethernet connection as specified in RFC1483, which can be used as an IP link e.g. with DHCP to assign the address, DNS server, and default gateway. To do this, you bind an IP interface to the PVC like it would be done to a normal Ethernet port.

Table 9. PVC channels in bridged Ethernet mode

	Command	Purpose
Step 1	node(pvc)[vpi/vci]# [no] bind interface	Associates an IP interface configuration with this
	<if-name>	PVC.

Using PVC channels with PPPoE

The RFC1483 bridged Ethernet connection can also be used for PPPoE. To do this, you enter PPPoE mode within the PVC mode. All PPPoE commands apply as if the PVC was a regular Ethernet port.

Table 10. PVC channels in PPPoE mode

	Command	Purpose
Step 1	node(pvc)[vpi/vci]# pppoe	Enters PPPoE configuration mode for this PVC.
Step 2	node(pppoe)# session <name>	Defines a PPPoE session.
Step 3	node(session)[<name>]# bind sub-	Links the session to a subscriber definition.
	scriber <subscriber-name>
Step 4	node(session)[<name>]# no shutdown	Enables the PPPoE session

Note The bridged PVC connections are internally mapped to VLANs on a virtual Ethernet port 0/2. You will therefore see references to this third Ethernet port when displaying PPPoE status information or debug logs.

Setting up permanent virtual circuits (PVC) 39