user manual
Table Of Contents
- Cisco Content Services Switch Routing and Bridging Configuration Guide
- Contents
- Preface
- Configuring Interfaces and Circuits
- Interface and Circuit Overview
- Configuring Interfaces
- Configuring an Interface
- Entering a Description for the Interface
- Configuring Interface Duplex and Speed
- Setting Interface Maximum Idle Time
- Bridging an Interface to a VLAN
- Specifying VLAN Trunking for an Interface
- Configuring Spanning-Tree Bridging for a VLAN or a Trunked Interface
- Configuring Port Fast on an Interface
- Showing Interface Configurations
- Shutting Down an Interface
- Shutting Down All Interfaces
- Restarting an Interface
- Restarting All Interfaces
- Configuring Circuits
- Configuring RIP for an IP Interface
- Configuring the Switched Port Analyzer Feature
- Configuring Spanning-Tree Bridging for the CSS
- CSS Spanning-Tree Bridging Quick Start
- Configuring Spanning-Tree Bridge Aging-Time
- Configuring Spanning-Tree Bridge Forward-Time
- Configuring Spanning-Tree Bridge Hello-Time
- Configuring Spanning-Tree Bridge Max-Age
- Configuring Spanning-Tree Bridge Priority
- Disabling Bridge Spanning-Tree
- Showing Bridge Configurations
- Configuring Open Shortest Path First (OSPF)
- OSPF Overview
- CSS OSPF Configuration Quick Start
- Configuring OSPF on the CSS
- Configuring OSPF on a CSS IP Interface
- Showing OSPF Information
- OSPF Configuration in a Startup-Configuration File
- Configuring the Address Resolution Protocol
- Configuring Routing Information Protocol
- Configuring the Internet Protocol
- IP Configuration Quick Start
- Configuring an IP Route
- Disabling an Implicit Service for the Static Route Next Hop
- Configuring an IP Source Route
- Configuring the IP Record Route
- Configuring Box-to-Box Redundancy
- Configuring IP Equal-Cost Multipath
- Forwarding IP Subnet Broadcast Addressed Frames
- Configuring IP Unconditional Bridging
- Configuring IP Opportunistic Layer 3 Forwarding
- Showing IP Configuration Information
- Configuring the Cisco Discovery Protocol
- Configuring the DHCP Relay Agent
- Index
8-3
Cisco Content Services Switch Routing and Bridging Configuration Guide
OL-4580-01
Chapter 8 Configuring the DHCP Relay Agent
Adding a DHCP Destination on a Circuit
Adding a DHCP Destination on a Circuit
A CSS circuit acts as the DHCP relay agent. For each circuit on the CSS, you can
configure a maximum of five DHCP destinations. The initial DHCP broadcast
request is sent to all of the configured destinations.
Do not configure a relay destination on a circuit when the relay destination is
directly connected to or reachable from one of the ports on the same circuit. In
this case, the DHCP packets reach the relay destination through normal broadcast
and a relay agent is not required.
Use the dhcp relay-to command to specify the DHCP relay destination address.
This command is available in circuit configuration mode. Enter an IP address in
dotted-decimal notation.
For example, to add a destination address of 192.168.22.25 to a DHCP server,
enter:
(config-circuit[VLAN2])# dhcp relay-to 192.168.22.25
To remove the relay destination address, enter:
(config-circuit[VLAN2])# no dhcp relay-to 192.168.22.25
Enabling and Disabling DHCP on the Circuit
After you enable the DHCP relay agent on the CSS circuit, the CSS transfers
DHCP messages between DHCP clients and servers. Use the dhcp-relay-agent
command to enable the agent on the circuit. This command is available in circuit
configuration mode.
For example:
(config-circuit[VLAN2])# dhcp-relay-agent
To disable the DHCP relay agent on the circuit, enter:
(config-circuit[VLAN2])# no dhcp-relay-agent