Configuring Outbound Gateway Address For Dhcp Clients; Configuring Parameters For Dhcp Server To Send Ping Packets - 3Com 8800 Configuration Manual

3Com Switch 8800 Configuration Guide
III. Configuring custom DHCP options for multiple VLAN interfaces
Perform the following configuration in system view.
Table 13-27 Configure custom DHCP options for multiple VLAN interfaces
Configure a custom DHCP option for
DHCP address pools of multiple VLAN
interfaces
Remove
configured for DHCP address pools of
multiple VLAN interfaces
If you execute the dhcp server option command multiple times, the newly configured
option overwrites the existing one.

13.3.10 Configuring Outbound Gateway Address for DHCP Clients

An outbound gateway enables DHCP clients to access external network devices.
Packets destined for external networks are forwarded by outbound gateways. At
present, you can configure up to eight IP addresses for outbound gateways.
Perform the following configuration in DHCP address pool view.
Table 13-28 Configure outbound gateway address for DHCP clients
Configure
gateway addresses for DHCP clients
Remove one or all outbound gateway
addresses configured for DHCP clients
By default, no outbound gateway address is configured for DHCP clients.
If you execute the gateway-list command multiple times, the newly configured IP
addresses overwrite the existing ones.

13.3.11 Configuring Parameters for DHCP Server to Send Ping Packets

To avoid address conflict caused by reassigning an in-use IP address, before assigning
an IP address to a DHCP client, the DHCP server detects the network using the ping
instructions to ensure the IP address is not occupied. The DHCP server determines
whether an IP address is reachable by sending specified number of ping packets. It
waits for response packet for a specified period after sending each of these packets. If
Operation
a custom DHCP
Operation
one or more outbound
13-17
Chapter 13 DHCP Configuration
dhcp server option code { ascii
ascii-string | hex hex-string | ip-address
ip-address [ ip-address ] } { interface
vlan-interface
vlan-interface vlan_id ] | all }
option undo dhcp
{ interface vlan-interface vlan_id [ to
vlan-interface vlan_id ] | all }
gateway-list ip-address [ ip-address ]
undo gateway-list { ip-address | all }
Command
vlan_id [
server option code
Command
to