3Com Switch 7750 Configuration Guide Guide

564 CHAPTER 54: DHCP SERVER CONFIGURATION
Configuring NetBIOS
Services for the DHCP
Server
For Microsoft Windows-based DHCP clients that communicate through NetBIOS
protocol, the host name-to-IP address translation is carried out by Windows
internet naming service (WINS) servers. So you need to perform WINS-related
configuration for most Windows-based hosts. Currently, you can configure up to
eight WINS addresses for a DHCP address pool.
Host name-to-IP address mappings are needed for DHCP clients communicating
through NetBIOS protocol. According to the way to establish the mapping,
NetBIOS nodes fall into the following four categories:
■ B-node. Nodes of this type establish their mappings through broadcasting (The
character b stands for the word broadcast). The source node obtains the IP
address of the destination node by sending the broadcast packet containing
the host name of the destination node. After receiving the broadcast packet,
the destination node returns its IP address to the source node.
■ P-node. Nodes of this type establish their mappings by sending unicast packets
to WINS servers. (The character p stands for peer-to-peer). The source node
sends the unicast packet to the WINS server. After receiving the unicast packet,
the WINS server returns the IP address corresponding to the destination node
name to the source node.
■ M-node. Nodes of this type are p-nodes mixed with broadcasting features (The
character m stands for the word mixed), that is to say, this type of nodes obtain
mappings by sending broadcast packets first. If they fail to obtain mappings,
they send unicast packets to the WINS server to obtain mappings.
■ H-node. Nodes of this type are b-nodes mixed with peer-to-peer features. (The
character h stands for the word hybrid), that is to say, this type of nodes obtain
mappings by sending unicast packets to WINS servers. If they fail to obtain
mappings, they send broadcast packets to obtain mappings.
Tabl e 434 Configure DNS services for the DHCP server
Operation Command Description
Enter system view system-view -
Create a DHCP address pool
and enter DHCP address pool
view
dhcp server ip-pool
pool-name
Required
By default, no global DHCP
address pool is created
Configure a domain name for
DHCP clients
domain-name domain-name
Required
By default, no domain name is
configured for DHCP clients
Configure DNS server
addresses for DHCP clients
dns-list ip-address&<1-8>
Required
By default, no DNS server
address is configured
Tabl e 435 Configure NetBIOS services for the DHCP server
Operation Command Description
Enter system view system-view -
Create a DHCP address pool
and enter DHCP address pool
view
dhcp server ip-pool
pool-name
Required
By default, no global DHCP
address pool is created