Dhcp Relay Agent Configuration - HP GbE2c - Blc Layer 2/3 Fiber SFP Option Application Manual

Ethernet blade switch for c-class bladesystem
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switch. The servers respond as a UDP Unicast message back to the switch, with the default gateway and IP address
for the client. The destination IP address in the server response represents the interface address on the switch that
received the client request. This interface address tells the switch on which VLAN to send the server response to the
client.

DHCP relay agent configuration

To enable the switch to be the BOOTP forwarder, you need to configure the DHCP/BOOTP server IP addresses on the
switch. Generally, you should configure the command on the switch IP interface closest to the client so that the DHCP
server knows from which IP subnet the newly allocated IP address should come.
The following figure shows a basic DHCP network example:
Figure 16
DHCP relay agent configuration
In GbE2c implementation, there is no need for primary or secondary servers. The client request is forwarded to the
BOOTP servers configured on the switch. The use of two servers provides failover redundancy. However, no health
checking is supported.
Use the following commands to configure the switch as a DHCP relay agent:
>> # /cfg/l3/bootp
>> Bootstrap Protocol Relay# addr
>> Bootstrap Protocol Relay# addr2
>> Bootstrap Protocol Relay# on
>> Bootstrap Protocol Relay# off
>> Bootstrap Protocol Relay# cur
Additionally, DHCP Relay functionality can be assigned on a per interface basis. Use the following command to
enable the Relay functionality:
>> # /cfg/l3/if <1-256>/relay ena
(Set IP address of BOOTP server)
(Set IP address of 2nd BOOTP server)
(Globally turn BOOTP relay on)
(Globally turn BOOTP relay off)
(Display current configuration)
Basic IP routing 93

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