Users Guide

Microsoft Network Load Balancing
Network load balancing (NLB) is a clustering functionality that is implemented by Microsoft on Windows 2000
Server and Windows Server 2003 operating systems. Microsoft NLB clustering allows multiple servers running
Microsoft Windows to be represented by one MAC and one IP address to provide transparent failover and
load-balancing. The Dell Networking OS does not recognize server clusters by default; you must configure
NLB functionality on a switch to support server clusters. The maximum NLB entry limit from 8 to 11 is
increased and support for more CAM-ACL to increase.
Topics:
• arp (for Multicast MAC Address)
• mac-address-table static (for Multicast MAC Address)
• ip vlan-flooding
arp (for Multicast MAC Address)
To associate an IP address with a multicast MAC address in the switch when you configure multicast mode of
network load balancing (NLB), use address resolution protocol (ARP).
Syntax
arp ip-address multicast-mac-address interface
To remove an ARP address, use the no arp ip-address command.
Parameters
ip-address Enter an IP address in dotted decimal format.
multicast-mac-
address
Enter a 48-bit hexadecimal address in nn:nn:nn:nn:nn:nn format
for the static MAC address to be used to switch multicast traffic.
interface Enter any of the following keywords and slot/port[/subport] or
number information:
• For a 10-Gigabit Ethernet interface, enter the keyword
TenGigabitEthernet then the slot/port[/subport]
information.
• For a 40-Gigabit Ethernet interface, enter the keyword
fortyGigE then the slot/port information.
• For a port channel interface, enter the keywords port-
channel then a number.
• The interface specified here must be one of the interfaces
configured using the {output-range | output}
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