Learning by Doing: CISCO Certified Network ... - SCN Research

Point-to-Point Protocol (PPP)
Objective:
To learn more about serial line encapsulation types:
Tools and Materials:
(2) Workstations
(2) Console cables
(2) DTE cables
(2) DCE cables
(3) Routers
Lab Diagram:
s0/0 s0/1 s0/0 s0/1 L0
L0
L0
Name: Terminus Leftist Urvile
S0/0 200.200.200.1/24 201.200.200.1/24 n/a
S0/1 n/a 200.200.200.2/24 201.200.200.2/24
L0 10.0.0.1/8 11.0.0.1/8 12.0.0.1/8
Background:
Back in part 2 we learned the default encapsulation type on a serial line is HDLC. This is
CISCO’s proprietary “Serial HDLC Synchronous” line protocol. Needless to say it does
not always work well with non-CISCO devices. For example, IBM routers would need to
use SDLC for its serial line encapsulations. So how do we know what encapsulations are
available to us? That’s easy…we just need to use our handy-dandy help feature at the
right moment on the router. So let’s look:
Router(config)#int s0/0
Router(config-if)#enc ?
371