Riverstone Networks WICT1-12 - Manual (Page 184)

11-6 Riverstone Networks RS Switch Router User Guide Release 8.0
Configuring Reverse Address Resolution Protocol (RARP) IP Routing Configuration Guide
To change the interval for sending ARP requests for unresolved entries to 45 seconds:
To change the number of unresolved entries that the RS attempts to resolve to 75:
11.4.3 Configuring Proxy ARP
The RS can be configured for proxy ARP. The RS uses proxy ARP (as defined in RFC 1027) to help hosts with no
knowledge of routing determine the MAC address of hosts on other networks or subnets. Through proxy ARP, the RS
will respond to ARP requests from a host with a ARP reply packet containing the RS MAC address. Proxy ARP is
enabled by default on the RS. The following example disables proxy ARP on all interfaces:
11.5 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 RS, which returns
an IP address.
Configuring RARP on the RS consists of two steps:
1. Letting the RS know which IP interfaces to respond to
2. Defining the mappings of MAC addresses to IP addresses
11.5.1 Specifying IP Interfaces for RARP
The
rarpd set interface
command allows you to specify which interfaces the RS’s RARP server responds to
when sent RARP requests. You can specify individual interfaces or all interfaces. To cause the RS’s RARP server to
respond to RARP requests from interface int1:
rs# arp set unresolve-timer 45
rs# arp set unresolve-threshold 75
rs(config)# ip disable-proxy-arp interface all
rs(config)# rarpd set interface int1