1. RARP : Reverse Address Resolution Protocol

2. Introduction
How does a diskless station gets it’s IP-address for loading it’s operating system over the network?

3. Resolving an IP Address3
RARP Server
file1
file2 1
Boot
?.?.?.? 2
RARP
Broadcast
IP Address = 4
IP Address =
Hardware Address =

4. RARP Packet Format Frame type = 0x08035 operation 3 RARP request
Ethernet
dest addr
srce addr
Frame
type
hard
prot
hard size
Sender
Eth addr
prot size
operat
IP addr
tartget
target 6 2 1 4
Ethernet header
28 byte ARP request/reply
Frame type = 0x08035
operation
3 RARP request
4 RARP reply

5. RARP Server Design Mapping between MAC-address IP-address
disk-file with OS
TFTP server to receive OS
Multiple RARP Servers per network for redundancy
first RARP reply