Assigning Ip Addresses To Network Interfaces - Cisco Catalyst 3550 series Software Configuration Manual

Chapter 31 Configuring IP Unicast Routing
Table 31-1 Default Addressing Configuration (continued)
Feature
IRDP
IP proxy ARP
IP routing
IP subnet-zero

Assigning IP Addresses to Network Interfaces

An IP address identifies a location to which IP packets can be sent. Some IP addresses are reserved for
special uses and cannot be used for host, subnet, or network addresses.
addresses and shows which are reserved and which are available for use. RFC 1166, "Internet Numbers,"
contains the official description of IP addresses.
Table 31-2 Reserved and Available IP Addresses
Class
A
B
C
D
E
An interface can have one primary IP address. A mask identifies the bits that denote the network number
in an IP address. When you use the mask to subnet a network, the mask is referred to as a subnet mask.
To receive an assigned network number, contact your Internet service provider.
78-11194-09
Default Setting
Disabled.
Defaults when enabled:
Broadcast IRDP advertisements.
•
Maximum interval between advertisements: 600 seconds.
•
Minimum interval between advertisements: 0.75 times max interval
•
• Preference: 0.
Enabled.
Disabled.
Disabled.
Address or Range
0.0.0.0
1.0.0.0 to 126.0.0.0
127.0.0.0
128.0.0.0 to 191.254.0.0
191.255.0.0
192.0.0.0
192.0.1.0 to 223.255.254
223.255.255.0
224.0.0.0 to 239.255.255.255
240.0.0.0 to 255.255.255.254
255.255.255.255
Configuring IP Addressing on Layer 3 Interfaces
Status
Reserved
Available
Reserved
Available
Reserved
Reserved
Available
Reserved
Multicast group addresses
Reserved
Broadcast
Catalyst 3550 Multilayer Switch Software Configuration Guide
Table 31-2 lists ranges of IP
31-5