HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual page 295

Configuring the Data Link Layer Protocol for E1, T1, and Serial Interfaces
Configuring the Logical Interface
For example, you would enter the following commands to configure a loop-
back interface and then configure the HDLC 1 interface to use the IP address
assigned to that loopback interface:
ProCurve(config)# interface loopback 1
ProCurve(config-loop 1)# ip address 192.168.5.1 /24
ProCurve(config-loop 1)# interface hdlc 1
ProCurve(config-hdlc 1)# ip unnumbered loopback 1
N o t e
You do not have to enter no shutdown to activate a loopback interface. The
status of a loopback interface changes to up after you enter the interface
loopback command.
Bind the Physical Interface to the Logical Interface
On the ProCurve Secure Router, you must bind the physical interface to the
logical interface so that the router knows which Data Link Layer protocol to
use for that WAN connection. When you bind a physical interface to a logical
interface, the two are considered a single interface bind group.
You can enter the bind command from the global configuration mode context
or the HDLC interface configuration mode context:
Syntax: bind <bind number> <physical interface> <slot>/<port> [<tdm-group
number>] <logical interface> <logical interface number>
You can also enter the bind command from the HDLC interface configuration
mode context.
Replace <bind number> with a number that is globally significant. That is,
each bind command you enter on the router must have a unique bind number.
Replace <physical interface> with E1, T1, or serial. Replace <slot> and <port>
with the numbers that identify the physical interface's location on the
ProCurve Secure Router.
If you are binding the HDLC interface to an E1 or T1 interface, include the
<tdm-group number> that you created when you configured the E1 or T1
interface. If you are binding the HDLC interface to a serial interface, you do
not include this option.
Replace <logical interface> with hdlc and the <logical interface number>
with the number you assigned to this interface.
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