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DGS-3400 Series Layer 2 Gigabit Ethernet Managed Switch CLI Manual
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57
N
ETWORK
L
OAD
B
ALANCING
(NLB)
C
OMMANDS
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 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-3450: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-3450:admin#
delete nlb multicast_fdb
Purpose
Use to delete the switch’s NLB multicast FDB entry.
Syntax
delete nlb multicast_fdb [<vlan_name 32> | vlanid <vlanid>] <macaddr>
Description
The delete nlb multicast_fdb command is used to delete the NLB multicast FDB entry.