Configuring Multicast Arp - HP 10500 Series Configuration Manual

subnet mask of the receiving interface is not in the subnet 10.10.10.5/24, VLAN-interface 10 cannot
process the ARP packet.
With this feature enabled, the device calculates the subnet address by using the default mask of the class
A network where 10.10.10.5/24 resides. Because 10.10.10.5/24 is on the same class A network as
10.1 1.1 1.1/8, VLAN-interface 10 can learn the sender IP and MAC addresses in the request.
To enable natural mask support for ARP requests:
Step
1. Enter system view.
2. Enable natural mask support
for ARP requests.

Configuring multicast ARP

Microsoft NLB is a load balancing technology for server clustering developed on Windows Server.
NLB supports load sharing and redundancy among servers within a cluster. To implement fast failover,
NLB requires that the switch forwards network traffic to all servers or specified servers in the cluster, and
each server filters out unexpected traffic. In a medium or small data center that uses the Windows Server
operating system, the proper cooperation of the switch and NLB is very important. For more information
about NLB, see the related documents for Windows Server.
Microsoft NLB provides the following packet sending modes to make the switch forward network traffic
to all servers or specified servers:
Unicast mode—NLB assigns each cluster member a common MAC address, which is the cluster
•
MAC address, and changes the source MAC address of each sent packet. The switch cannot add
the cluster MAC address to its MAC table. In addition, because the cluster MAC address is
unknown to the switch, packets destined to it are forwarded on all ports of the switch.
Multicast mode—NLB uses a multicast MAC address that is a virtual MAC address for network
•
communication (for example 0300-5e1 1- 1 1 1 1).
• IGMP multicast mode—The switch sends packets only out of the ports that connect to the cluster
members rather than all ports.
NOTE:
Multicast ARP is applicable to only multicast-mode NLB.
To configure multicast ARP:
Step
1. Disable the ARP entry check
function.
2. Configure a static ARP entry.
3. Configure a static multicast
MAC address entry.
Command
system-view
naturemask-arp enable
Command
undo arp check enable
arp static ip-address mac-address
vlan-id interface-type interface-number
[ vpn-instance vpn-instance-name ]
mac-address multicast mac-address
interface interface-list vlan vlan-id
6
Remarks
N/A
Disabled by default.
Remarks
Required when the device learns
dynamic ARP entries that contain
multicast MAC addresses.
Optional.
For more informa
tion about the
mac-address multicast
command, see IP Multicast
Command Reference.