Configuring IP

Table 6.1: IP Global Parameters – routing switches (Continued)

Parameter

Description

Default

See page...

 

 

 

 

Directed

A directed broadcast is a packet containing all ones

Disabled

6-32

broadcast

(or in some cases, all zeros) in the host portion of the

 

 

forwarding

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.

 

 

 

 

 

 

Directed

The packet format the router treats as a directed

All ones

6-34

broadcast mode

broadcast. The following formats can be directed

Note: If you enable

 

 

broadcast:

 

 

all-zeroes directed

 

 

 

 

 

 

• All ones in the host portion of the packet’s

broadcasts, all-ones

 

 

 

destination address.

directed broadcasts

 

 

• All zeroes in the host portion of the packet’s

remain enabled.

 

 

 

 

 

 

destination address.

 

 

 

 

 

 

Source-routed

A source-routed packet contains a list of IP addresses

Enabled

6-33

packet

through which the packet must pass to reach its

 

 

forwarding

destination.

 

 

 

 

 

 

ICMP Router

An IP protocol a router can use to advertise the IP

Disabled

6-62

Discovery

addresses of its router interfaces to directly attached

 

 

Protocol (IRDP)

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. See Table 6.2 on page 6-14.

 

 

 

 

 

 

Reverse ARP

A IP mechanism a host can use to request an IP

Enabled

6-64

(RARP)

address from a directly attached router when the host

 

 

 

boots.

 

 

 

 

 

 

Static RARP

An IP address you place in the RARP table for RARP

No entries

6-66

entries

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.

 

 

 

 

 

 

Maximum

The maximum number of hops away a BootP server

Four

6-72

BootP relay

can be located from a router and still be used by the

 

 

hops

router’s clients for network booting.

 

 

 

 

 

 

 

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