D-Link DI-1750 Reference Manual page 74

Basic Subinterface Examples
In the following example, subinterface 1 models a point-to-point subnet and subinterface 2 models a
multipoint subnet.
interface s1/0
encapsulation frame-relay
frame-relay intf-type dce
interface s1/0.1 point-to-point
ip address 10.0.1.1 255.255.255.0
frame-relay local-dlci 20
frame-relay map 10.0.1.2 pvc 20
!
interface s1/0.2 multipoint
ip addr10.0.2.1 255.255.255.0
frame-relay local-dlci 20
frame-relay map 10.0.2.2 pvc 20
5.4.11 Configure Frame Relay Subinterface with Dynamic Address Mapping
The following example configures two subinterfaces for dynamic address resolution. Each subinterface
is provided with an individual protocol address and subnet mask.
local-dlci Command specify DLCI for subinterface. Each subinterface acquired remote address by
dynamic address resolution.
interface s1/0
ip (undo) address
encapsulation frame-relay
frame-relay inverse-arp
frame-relay lmi-type ansi
!
interface s1/0.103 multipoint
ip address 192.168.177.18 255.255.255.0
frame-relay local-dlci 300
!
interface s1/0.104 multipoint
ip addr192.168.178.18 255.255.255.0
frame-relay local-dlci 400
5.5 X.25 Configuration
This chapter describes how to configure connections through Link Access Procedure, Balanced (LAPB)
connections and X.25 networks. X.25 protocol is connection-oriented reliable data transmitting protocol,
which inculdes the LAPB rules of OSI data link layer and X.25 rules of network layer. X.25 rules defines
two types of hosts:DTE and DCE.
The router using X.25 encapsulation can use as DTE or DCE equipment on protocol layer, that
diffenent form hardware DTE and DCE.
To understand the complete description of the commands in this chapter, please see the "X.25 and
LAPB command" chapter of WAN Command Reference. Use command index for other commands
appeared in this chapter.
5.5.1 Configure LAPB
X.25 Level 2 or LAPB operates at the data link layer of the OSI reference model. LAPB specifies
methods for exchanging data (in units called frames), detecting out-of-sequence or missing frames,
retransmitting frames, and acknowledging frames. Several protocol parameters can be modified to
change LAPB protocol performance on a particular link. Because X.25 operates the Packet Level
Protocol (PLP) on top of the LAPB protocol, these tasks apply to both X.25 links and LAPB links. The
parameters and their default values are summarized in Table 5.
Model Name
- 72 -