Configuring Ip Addressing On Layer 3 Interfaces - Cisco Catalyst 3550 series Software Configuration Manual

Configuring IP Addressing on Layer 3 Interfaces

Configuring IP Addressing on Layer 3 Interfaces
A required task for configuring IP routing is to assign IP addresses to Layer 3 network interfaces to
enable the interfaces and allow communication with the hosts on those interfaces that use IP. These
sections describe how to configure various IP addressing features. Assigning IP addresses to the
interface is required; the other procedures are optional.
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Default Addressing Configuration
Table 31-1
Table 31-1 Default Addressing Configuration
Feature
IP address
ARP
IP broadcast address
IP classless routing
IP default gateway
IP directed broadcast
IP domain
IP forward-protocol
IP helper address
IP host
Catalyst 3550 Multilayer Switch Software Configuration Guide
31-4
Default Addressing Configuration, page 31-4
Assigning IP Addresses to Network Interfaces, page 31-5
Configuring Address Resolution Methods, page 31-8
Routing Assistance When IP Routing is Disabled, page 31-11
Configuring Broadcast Packet Handling, page 31-13
Monitoring and Maintaining IP Addressing, page 31-17
shows the default addressing configuration.
Default Setting
None defined.
No permanent entries in the Address Resolution Protocol (ARP) cache.
Encapsulation: Standard Ethernet-style ARP.
Timeout: 14400 seconds (4 hours).
255.255.255.255 (all ones).
Enabled.
Disabled.
Disabled (all IP directed broadcasts are dropped).
Domain list: No domain names defined.
Domain lookup: Enabled.
Domain name: Enabled.
If a helper address is defined or User Datagram Protocol (UDP) flooding is
configured, UDP forwarding is enabled on default ports.
Any-local-broadcast: Disabled.
Spanning Tree Protocol (STP): Disabled.
Turbo-flood: Disabled.
Disabled.
Disabled.
Chapter 31 Configuring IP Unicast Routing
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