R3303-HP HSR6800 Routers Layer 2 - WAN Configuration Guide

117
Ste
p
Command Remarks
3. Configure a virtual circuit on
the interface.
fr dlci dlci-number
By default, no virtual circuits are
created on interfaces.
Configuring a frame relay subinterface
Frame relay offers two types of interfaces: main interface and subinterface. The subinterface is of logical
structure, which can be configured with protocol address and virtual circuit. One physical interface can
include multiple subinterfaces, which do not exist physically. However, for the network layer, the
subinterface and main interface make no difference and both can be configured with virtual circuits to
connect to remote devices.
The subinterfaces of frame relay include the following types: point-to-point (P2P) subinterface and
point-to-multipoint (P2MP) subinterface. A P2P subinterface connects a single remote device and a P2MP
subinterface connects multiple remote devices. A P2MP subinterface can be configured with multiple
virtual circuits, each of which sets up an address map with its connected remote network address to
distinguish different connections. Address maps can be manually set up, or dynamically set up by InARP.
The methods to configure a virtual circuit and address map for P2P subinterfaces and P2MP
subinterfaces are different, as follows:
• P2P subinterface—Because only one peer address exists for a P2P subinterface, the peer address
is determined when a virtual circuit is configured for the subinterface. You do not need to configure
dynamic or static address mapping for P2P subinterface.
• P2MP subinterface—For a P2MP subinterface, a peer address can be mapped to the local DLCI
through static address mapping or InARP. The InARP configuration only needs to be configured on
the main interface. If static address mapping is required, it is necessary to set up static address map
for each virtual circuit.
To configure a frame relay subinterface:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Create a
subinterface and
enter subinterface
view.
interface interface-type
interface-number.subnumber [ p2mp | p2p ]
By default, a frame relay
subinterface operates in p2mp
mode.
3. Configure a virtual
circuit on the frame
relay subinterface.
See "Configuring a frame relay local virtual
circu
it."
On a frame relay subinterface,
virtual circuits must be created
manually and be identical to those
created at the DCE end.
4. Configure address
mappings.
See "Configuring frame relay address
mappi
ngs."
Optional for a P2P subinterface.
Required for a P2MP
subinterface.