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Configuring IP
Table 6.1: IP Global Parameters – routing switches (Continued)
Directed
broadcast
forwarding
A directed broadcast is a packet containing all ones
(or in some cases, all zeros) in the host portion of the
destination IP address. When a router forwards such
a broadcast, it sends a copy of the packet out each of
its enabled IP interfaces.
Note: You also can enable or disable this parameter
on an individual interface basis. See Table 6.2 on
page 6-14.
Disabled 6-32
Directed
broadcast mode
The packet format the router treats as a directed
broadcast. The following formats can be directed
broadcast:
• All ones in the host portion of the packet’s
destination address.
• All zeroes in the host portion of the packet’s
destination address.
All ones
Note: f you enable
all-zeroes directed
broadcasts, all-ones
directed broadcasts
remain enabled.
6-34
Source-routed
packet
forwarding
A source-routed packet contains a list of IP addresses
through which the packet must pass to reach its
destination.
Enabled 6-33
ICMP Router
Discovery
Protocol (IRDP)
An IP protocol a router can use to advertise the IP
addresses of its router interfaces to directly attached
hosts. You can enable or disable the protocol, and
change the following protocol parameters:
• Forwarding method (broadcast or multicast)
• Hold time
• Maximum advertisement interval
• Minimum advertisement interval
• Router preference level
Note: You also can enable or disable IRDP and
configure the parameters on an individual interface
basis. e Table 6.2 on page 6-14.
Disabled 6-62
Reverse ARP
(RARP)
A IP mechanism a host can use to request an IP
address from a directly attached router when the host
boots.
Enabled 6-64
Static RARP
entries
An IP address you place in the RARP table for RARP
requests from hosts.
Note: You must enter the RARP entries manually.
The routing switch does not have a mechanism for
learning or dynamically generating RARP entries.
No entries 6-66
Maximum
BootP relay
hops
The maximum number of hops away a BootP server
can be located from a router and still be used by the
router’s clients for network booting.
Four 6-72
Parameter Description Default See page...
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