Configuring the Data Link Layer Protocol for E1, T1, and Serial Interfaces
Example Networks
6-46
Settings Explained in Other Chapters
In addition to configuring these settings for an HDLC interface, you can:
assign ACPs or ACLs to control access to the HDLC interface
enable bridging
assign crypto maps to enable VPNs
configure settings for routing protocols
configure QoS settings
Table 6-10 lists additional configurations that you can enter from the HDLC
interface and the page number where you find information about those
configurations.
Table 6-10. Additional Configurations for the HDLC Interface
Settings
access controls to filter incoming and outgoing traffic
bridging
VPNs
routing commands for OSPF, RIP, or BGP
QoS settings
Example Networks
This section outlines examples of E1- and T1-carrier lines that use PPP, Frame
Relay, and HDLC as the Data Link Layer protocol. It also provides examples
of WANs that are using PPP authentication.
Example 1. Figure 6-9 shows a company's WAN that includes a connection
between two offices in London. Because this company needed a constant,
reliable connection between these two offices, they leased an E1-carrier line
for both the Seething Lane and Chelsea Harbor offices. The Data Link Layer
protocol is PPP.
The company also required a connection to its Paris office. For this connec-
tion, the company negotiated an SLA with a Frame Relay service provider.
Configuration
Page
Guide
Advanced
5-18, 5-37
Basic
10-6
Advanced
8-46
Advanced
13-1
Advanced
7-28