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DGS-3600 Series Layer 3 Gigabit Ethernet Managed Switch CLI Manual
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NETWORK LOAD BALANCING (NLB) COMMANDS
The NLB indicates the Network Load Balancing: it is a MAC forwarding control for supporting Microsoft’s Network Load
Balancing technique.
The Network Load Balancing (NLB) commands in the Command Line Interface (CLI) are listed (along with the
appropriate parameters) in the following table.
Command Parameters
create nlb multicast_fdb [<vlan_name 32> | vlanid <vlanid>] <macaddr>
delete nlb multicast_fdb [<vlan_name 32> | vlanid <vlanid>] <macaddr>
config nlb multicast_fdb [<vlan_name 32> | vlanid <vlanid>] <macaddr> [add | delete] <portlist>
show nlb fdb
Each command is listed, in detail, in the following sections.
create nlb multicast_fdb
Purpose Use to create the switch’s NLB multicast FDB entry.
Syntax
create nlb multicast_fdb [<vlan_name 32> | vlanid <vlanid>] <macaddr>
Description The create nlb multicast_fdb command creates a NLB multicast FDB entry. The number of
supported entries is project dependent.
The network load balancing command set is used to support the Microsoft server load
balancing application where multiple servers can share the same IP address and MAC
address. The requests from clients will be forwarded to all servers, but will only be processed
by one of them. The server can work in one different modes – multicast mode. In multicast
mode, the client use the multicast MAC address as the destination MAC to reach the server.
Regarding of the mode, this destination Mac is the named the shared MAC. The server uses
its own MAC address (rather than the shared MAC) as the source MAC address of the reply
packet.
The NLB multicast FDB entry will be mutual exclusive with the L2 multicast entry.
Parameters
vlan_name - Specify the VLAN of the NLB multicast FDB entry to be created.
vlanid <vlanid> - Specify the VLAN by the VLAN ID.
<macaddr> - Specify the MAC address of the NLB multicast FDB entry to be created.
Restrictions Only Administrator and Operator-level users can issue this command.
Example usage:
To create a NLB multicast FDB entry:
DGS-3627:admin# create nlb multicast_fdb default 03-bf-01-01-01-01
Command: create nlb multicast_fdb default 03-bf-01-01-01-01
Success.
DGS-3627:admin#
delete nlb multicast_fdb
Purpose Use to delete the switch’s NLB multicast FDB entry.