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arp
To associate an IP address with a multicast MAC address in the switch when you configure multicast mode of the network load
balancing (NLB), use the 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 MAC 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 or number information:
● For the Management interface, enter the keyword ManagementEthernet
then the slot/port information. The slot range is from 0 to 1 and the port range
is 0.
● For a Port Channel interface, enter the keywords port-channel then a
number. The range is from 1 to 128.
● For a 10-Gigabit Ethernet interface, enter the keyword
TenGigabitEthernet then the slot/port information.
● The interface specified here must be one of the interfaces configured using the
{output-range | output} interface option with the mac-address-
table static command.
Defaults Not configured.
Command Modes CONFIGURATION
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.3(0.0) Added the support for association of an IP address with multicast MAC address on
the MXL platform.
8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
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 configuration mode. This setting causes the multicast MAC address to be mapped to
the cluster IP address for NLB mode of operation of the switch.
You cannot use Class D or Class E IP addresses or zero IP address (0.0.0.0) when creating a static ARP.
Zero MAC addresses (00:00:00:00:00:00) are also invalid.
Although static ARP entries take precedence over dynamically-learnt ARP entries, a static ARP entry that
points to a wrong port is not included in the FIB or ARP entries.
IPv4 Routing 539