Serial port configuration task list
182
IPLink Software Configuration Guide
15 • Serial port configuration
PVC Configuration:
Port DLCI State Fragment Encaps Binding
--------------------------------------------------------------
serial 0 0 0 1 open disabled rfc1490 wan@router
Figure 30. Typical Integrated Service Access Scenario with dedicated PVCs
Integrated service access
The example in
figure 30
shows a typical integrated service access scenario, where different service providers are
accessed via permanent virtual circuits (PVCs) on Frame Relay over the serial interface of an IPLink.
The multi service provider (MSP) offers both Internet access and voice services based on IP. The virtual private
network (VPN) provider offers secure interconnections of local access networks (LAN) via its public wide area
network based on IP. Since both providers are working independently, the IPLink needs a configuration, which
has two dedicated PVCs on Frame Relay. The first PVC, labeled as PVC 1, connects to the MSP access device.
The second PVC, labeled PVC 2, connects to the VPN provider access device on the leased line network.
An IPLink is working as a DTE and accesses the leased line network via a leased line modem connected to the
serial interface. The hardware port protocol X.21 is used on the serial interface on slot 0 and port 0.
Devices accessing the MSP and VPN services are attached to the 100 Mbps Ethernet port 0/0 on the IPLink.
For that reason, an IP context with three logical IP interfaces bound to Ethernet port 0/0, PVC 1 and PVC 2
on serial port 0/0 as shown in
figure 30
has to be configured for the IPLink. The IP interfaces are labeled to
represent the function of their configuration. Hence Ethernet port 0/0 is named lan, PVC 1 is named external
since external services are accessed via this PVC, and PVC 2 is named internal to indicate the private network
interconnection via this PVC.
Node
2300
IPLink
Leased Line
Network
Multi
Service
Provider
Multi
Service
Provider
VPN
Provider
VPN
Provider
Modem
Modem
Internet
PSTN
GW
GW
X.21
PVC 1
PVC 2