Chapter 38 Configuring IP Unicast Routing

Configuring IP Addressing

Configuring Address Resolution Methods, page 38-9

Routing Assistance When IP Routing is Disabled, page 38-12

Configuring Broadcast Packet Handling, page 38-14

Monitoring and Maintaining IP Addressing, page 38-18

Default Addressing Configuration

Table 38-1shows the default addressing configuration.

Table 38-1 Default Addressing Configuration

Feature

Default Setting

 

 

IP address

None defined.

 

 

ARP

No permanent entries in the Address Resolution Protocol (ARP) cache.

 

Encapsulation: Standard Ethernet-style ARP.

 

Timeout: 14400 seconds (4 hours).

 

 

IP broadcast address

255.255.255.255 (all ones).

 

 

IP classless routing

Enabled.

 

 

IP default gateway

Disabled.

 

 

IP directed broadcast

Disabled (all IP directed broadcasts are dropped).

 

 

IP domain

Domain list: No domain names defined.

 

Domain lookup: Enabled.

 

Domain name: Enabled.

 

 

IP forward-protocol

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.

 

 

IP helper address

Disabled.

 

 

IP host

Disabled.

 

 

IRDP

Disabled.

 

Defaults when enabled:

 

Broadcast IRDP advertisements.

 

Maximum interval between advertisements: 600 seconds.

 

Minimum interval between advertisements: 0.75 times max interval

 

Preference: 0.

 

 

IP proxy ARP

Enabled.

 

 

IP routing

Disabled.

 

 

IP subnet-zero

Disabled.

 

 

 

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

38-6

OL-9775-02

 

 

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Cisco Systems 3750E manual Default Addressing Configuration, Arp, Irdp, 38-6