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Chapter 5: Using AutoInstall
August 1997 Page 5-3
2524UM
3. An IP address-to-host name mapping for the new router must be
added to a Domain Naming System (DNS) database file.
z
If the existing router is to help automatically install the new route
via an HDLC-encapsulated serial interface using Serial Line Ad-
dress Resolution Protocol (SLARP), that interface must be config-
ured with an IP address whose host portion has the value 1 or 2.
(AutoInstall over Frame Relay does not have this address con-
straint.) Subnet masks of any size are supported.
z
If the existing router is to help automatically install the new route
using a Frame Relay-encapsulated serial interface, that interface
must be configured with:
An IP helper address pointing to the TFTP server. In this example,
171.69.2.75 is the address of the TFTP server:
ip helper 171.69.2.75
A Frame Relay map pointing back to the new router. In this exam-
ple, 172.21.177.100 is the IP address of the new router's serial in-
terface, and 100 is the PVC identifier:
frame-relay map ip 172.21.177.100 100 dlci
z
If the existing router is to help automatically install the new route
via an Ethernet, Token Ring, or FDDI interface using BOOTP o
Reverse Address Resolution Protocol (RARP), a BOOTP or
RARP server also must be set up to map the new router's Media
Access Control (MAC) address to its IP address.
z
IP helper addresses should be configured to forward the TFTP and
DNS broadcast requests from the new router to the host providing
those services.