HP 6120XG HP ProCurve Series 6120 Blade Switches Multicast and Routing Guide - Page 87

Displaying IRDP Information, Configuring DHCP Relay, Overview

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IP Routing Features Configuring DHCP Relay Displaying IRDP Information To display IRDP information, enter show ip irdp from any CLI level. ProCurve# show ip irdp Status and Counters - ICMP Router Discovery Protocol Global Status : Disabled VLAN Name Status Advertising Min int Max int Holdtime Preference Address (sec) (sec) (sec) DEFAULT_VLAN Enabled multicast 450 600 1800 0 VLAN20 Enabled multicast 450 600 1800 0 VLAN30 Enabled multicast 450 600 1800 0 Figure 3-15.Example of Output for Show IP IRDP Configuring DHCP Relay Overview The Dynamic Host Configuration Protocol (DHCP) is used for configuring hosts with IP address and other configuration parameters without user inter­ vention. The protocol is composed of three components: ■ DHCP client ■ DHCP server ■ DHCP relay agent The DHCP client sends broadcast request packets to the network; the DHCP servers respond with broadcast packets that offer IP parameters, such as an IP address for the client. After the client chooses the IP parameters, commu­ nication between the client and server is by unicast packets. ProCurve routing switches provide the DHCP relay agent to enable commu­ nication from a DHCP server to DHCP clients on subnets other than the one the server resides on. The DHCP relay agent transfers DHCP messages from DHCP clients located on a subnet without a DHCP server to other subnets. It also relays answers from DHCP servers to DHCP clients. 3-41

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-------------- -------- ------------ ------- ------- -------- -----------
IP Routing Features
Configuring DHCP Relay
Displaying IRDP Information
To display IRDP information, enter
show ip irdp
from any CLI level.
ProCurve# show ip irdp
Status and Counters - ICMP Router Discovery Protocol
Global Status : Disabled
VLAN Name
Status
Advertising
Min int Max int Holdtime Preference
Address
(sec)
(sec)
(sec)
DEFAULT_VLAN
Enabled
multicast
450
600
1800
0
VLAN20
Enabled
multicast
450
600
1800
0
VLAN30
Enabled
multicast
450
600
1800
0
Figure 3-15.Example of Output for Show IP IRDP
Configuring DHCP Relay
Overview
The Dynamic Host Configuration Protocol (DHCP) is used for configuring
hosts with IP address and other configuration parameters without user inter-
vention. The protocol is composed of three components:
■
DHCP client
■
DHCP server
■
DHCP relay agent
The DHCP client sends broadcast request packets to the network; the DHCP
servers respond with broadcast packets that offer IP parameters, such as an
IP address for the client. After the client chooses the IP parameters, commu-
nication between the client and server is by unicast packets.
ProCurve routing switches provide the DHCP relay agent to enable commu-
nication from a DHCP server to DHCP clients on subnets other than the one
the server resides on. The DHCP relay agent transfers DHCP messages from
DHCP clients located on a subnet without a DHCP server to other subnets. It
also relays answers from DHCP servers to DHCP clients.
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