Information Technology Reference
In-Depth Information
The ICMP process on PC2 formulates a ping reply to PC3 and sends the reply to the IP
process.
13.
The IP process on PC2 encapsulates the ping packet with a source IP address of
172.16.1.10
and destination IP address of
192.168.2.10
.
14.
PC2 then frames the packet with the source MAC address of (indicate device name)
PC2
and
the destination MAC address of (indicate device name)
R2
.
15.
PC2 then sends the frame out on the media as an encoded bit stream.
16.
R2 receives the bit stream on its
Fa0/0
interface. Because the destination MAC address matches
the receiving interface's MAC address, R2 strips off the Ethernet header.
17.
R2 looks up the destination network address
192.168.2.0/24
in its routing table. This destina-
tion has a next-hop IP address of
192.168.1.1
. The next-hop IP address is reachable out inter-
face
S0/0/1
.
18.
R2 encapsulates the packet in an HDLC frame and forwards the frame out the correct interface.
(Because this is a point-to-point link, no address is needed. However, the address field in the
HDLC packet contains the value 0x8F.)
19.
R3 receives the frame on the
S0/0/1
interface. Because the frame is HDLC, R3 strips off the
header and looks up the destination network address
192.168.2.0/24
in its routing table. This
destination address is directly connected to the
Fa0/0
interface.
20.
R3 encapsulates the ping request in a frame with the source MAC address of (indicated device
name)
R3
and the destination MAC address of (indicate device name)
PC3
.
21.
R3 then sends the frame out on the media as an encoded bit stream.
22.
PC3 receives the bit stream on its
Ethernet (NIC)
interface. Because the destination MAC
address matches the MAC address of PC3, PC3 strips off the Ethernet header.
23.
The IP process on PC3 examines the
192.168.2.10
IP address to make sure that it matches its
own IP address. Then PC3 passes the data to the ICMP process.
24.
ICMP sends a “success” message to the requesting application.
25.
Packet Tracer Companion: Basic Static Route Configuration
(2.8.1)
Packet Tracer
Companion
You can now open the file LSG02-Lab281.pka on the CD-ROM that accompanies this topic to repeat
this hands-on lab using Packet Tracer. Remember, however, that Packet Tracer is not a substitute for a
hands-on lab experience with real equipment. A summary of the instructions is provided within the
activity.
Lab 2-2: Challenge Static Route Configuration (2.8.2)
Upon completion of this lab, you will be able to
Subnet an address space given requirements
■
Assign appropriate addresses to interfaces and document
■
Cable a network according to the topology diagram
■
