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Catalyst 3550 Multilayer Switch Software Configuration Guide
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Chapter 4 Assigning the Switch IP Address and Default Gateway
Assigning Switch Information
Default Switch Information
Table 4-1
shows the default switch information.
Understanding DHCP-Based Autoconfiguration
The DHCP provides configuration information to Internet hosts and internetworking devices. This
protocol consists of two components: one for delivering configuration parameters from a DHCP server
to a device and a mechanism for allocating network addresses to devices. DHCP is built on a
client-server model, in which designated DHCP servers allocate network addresses and deliver
configuration parameters to dynamically configured devices.
During DHCP-based autoconfiguration, your switch (DHCP client) is automatically configured at
startup with IP address information and a configuration file.
With DHCP-based autoconfiguration, no DHCP client-side configuration is needed on your switch.
However, you need to configure the DHCP server for various lease options associated with IP addresses.
If you are using DHCP to relay the configuration file location on the network, you might also need to
configure a Trivial File Transfer Protocol (TFTP) server and a Domain Name System (DNS) server.
The DHCP server can be on the same LAN or on a different LAN than the switch. If the DHCP server
is running on a different LAN, you should configure a DHCP relay. A relay device forwards broadcast
traffic between two directly connected LANs. A router does not forward broadcast packets, but it
forwards packets based on the destination IP address in the received packet.
DHCP-based autoconfiguration replaces the BOOTP client functionality on your switch.
Table 4-1
Default Switch Information
Feature
Default Setting
IP address and subnet mask
No IP address or subnet mask are defined.
Default gateway
No default gateway is defined.
Enable secret password
No password is defined.
Host name
The factory-assigned default host name is Switch.
Telnet password
No password is defined.
Cluster command switch functionality
Disabled.
Cluster name
No cluster name is defined.
