Users Guide

34
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 congure 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.
arp (for Multicast MAC Address)
To associate an IP address with a multicast MAC address in the switch when you congure 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 trac.
interface Enter any of the following keywords and slot/port or number information:
• For a 10-Gigabit Ethernet interface, enter the keyword
TenGigabitEthernet then the slot/port 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 specied here must be one of the interfaces congured using the
{output-range | output} interface option with the mac-
address-table static command.
Defaults Not congured.
Command Modes CONFIGURATION
Command History
Version 9.3(0.0) Added support for association of an IP address with multicast MAC address on the
S4810, S4820T, S6000, and Z9000 platforms.
Usage Information For multicast mode of NLB, to associate an IP address with a multicast MAC address in the switch, use
address resolution protocol (ARP) by entering the arp ip-address multicast-mac-address
command in Global conguration mode. This setting causes the multicast MAC address to be mapped to the
cluster IP address for NLB mode of operation of the switch.
978
Microsoft Network Load Balancing