Dhcp Relay - 3Com 7700 Configuration Manual

DHCP Relay

Manually Add/Delete Static ARP Mapping Entries
Perform the following configuration in System view.
Table 4 Manually Add/Delete Static ARP Mapping Entries
Operation
Manually add a static ARP mapping
entry
Manually delete a static ARP
mapping entry
Note: Static ARP mapping entries will not time out, however dynamic ARP
mapping entries time out after 20 minutes.
The ARP mapping table is empty and the address mapping is obtained through
dynamic ARP by default.
Displaying and Debugging ARP
After the previous configuration, execute
the running of the ARP configuration, and to verify the effect of the configuration.
Execute command in user view to debug ARP configuration.
debugging
Table 5 Display and Debug ARP
Operation
Display ARP mapping table
Enable ARP information debugging debugging arp { packet | status }
Disable ARP information debugging undo debugging arp { packet | status }
All ARP mapping entries of the Ethernet switch are displayed by default.
Dynamic Host Configuration Protocol (DHCP) is used to ease entry and exit to the
network. It is also used to improve the use of the IP addresses in remote locations
or where the host number exceeds the number of allocated IP addresses. DHCP
works in Client-Server mode. With this protocol, the DHCP Client can dynamically
request configuration information and the DHCP server can configure the
information for the Client.
The DHCP relay serves as conduit between the DHCP Client and the server located
on different subnets. The DHCP packets can be relayed to the destination DHCP
server (or Client) across network segments. The DHCP clients on different
networks can use the same DHCP server. This is economical and convenient for
centralized management.
Command
arp static ip-address mac-address VLANID {
interface_type interface_num | interface_name }
undo arp static ip-address
command in all views to display
display
Command
display arp [ static | dynamic | ip-address ]
DHCP Relay 51