Filter
Top Products
DES-7200 Configuration Guide Chapter 9 NLB Group Configuration
9-2
9.1.1 Overview of NLB Group
NLB Group (also called cluster service) is a service developed to support
Microsoft Network Load Balance (NLB). On the core switch shown in Fig 1,
cluster service is not supported by default, namely all IP packets sent to the
cluster cannot be sent to master and slave master at the same time. This is
because the unicast packets have only one next-hop address. To allow
master server and slave server to receive IP packets sent to the cluster, the
cluster service must be configured on the device.
9.1.2 <Concept and terms of NLB
GROUP>
9.1.2.1 <NLB>
Network Load Balance (NLB) is a load balancing technology provided in
Windows 2000 Server and Windows Server 2003 of Microsoft. NLB uses a
distribution algorithm to distribute loads to multiple hosts, so as to provide
IP-based key services (such as Web, FTP, firewall, proxy, VPN and other
Internet server applications). A single computer running Windows system can
provide limited server reliability and scalability. However, by integrating two or
more computers running Windows Server 2003, NLB can provide the
performance and reliability needed by Web server and other key task servers.
9.1.2.2 <VRF>
The VPN to which the cluster belongs on the device. A VPN is a collection of
sites sharing routes through VPN routing/forwarding (VRF) table.
9.1.2.3 <NLB-Address>
IP address of cluster. NLB allows all computers in the cluster to be addressed
by a group of same cluster IP addresses.
9.1.2.4 <Reflector-Port>
Reflector port. To realize cluster service, the device uses a reflector port to
send cluster IP packets to all computers in the cluster.
9.1.2.5 <Destination-Port>
Destination port. The destination port to which packets will be sent (namely
the port connecting cluster and device), such as Gi 0/1 and Gi 0/2 shown in
Fig 1.