Cabletron Systems SmartSwitch - Manual (Page 89)

SmartSwitch Router User Reference Manual 89
Chapter 6: IP Routing Configuration Guide
Configuring Reverse Address Resolution Protocol (RARP)
Reverse Address Resolution Protocol (RARP) works exactly the opposite of ARP. Taking a
MAC address as input, RARP determines the associated IP address. RARP is useful for X-
terminals and diskless workstations that may not have an IP address when they boot.
They can submit their MAC address to a RARP server on the SSR, which returns an IP
address.
Configuring RARP on the SSR consists of two steps:
• Letting the SSR know which IP interfaces to respond to
• Defining the mappings of MAC addresses to IP addresses
Specifying IP Interfaces for RARP
To specify the interfaces that the RARP server on the SSR should respond to, enter the
following command in Configure mode:
Defining MAC-to-IP Address Mappings
To map a MAC address to an IP address, enter the following command in Configure
mode:
There is no limit to the number of address mappings you can configure.
Optionally, you can create a list of mappings with a text editor and then use TFTP to
upload the text file to the SSR. The format of the text file must be as follows:
Then place the text file on a TFTP server that the SSR can access and enter the following
command in Enable mode:
Specify interfaces for RARP. rarpd set interface |all
Map a MAC address to an
IP address. rarpd add hardware-address
ip-address
MAC-address1 IP-address1
MAC-address2 IP-address2
...
MAC-addressn IP-addressn
ssr# copy tftp-server to ethers
TFTP server?
<IPaddr-of-TFTP-server>
Source filename? <filename>