Specifications

MAC-forced forwarding enhancements (CR00017819) 156
Version 291-18
C613-10488-00 REV Q
MAC-forced forwarding enhancements (CR00017819)
This enhancement improved MAC-forced forwarding in the following ways:
■ The commands add and set macff server both now allow you to optionally specify a MAC and/or IP address for the static entry. The complete syntax is
now:
add macff server interface=vlan [description=description] [ipaddress=ipadd] [macaddress=macadd]
set macff server interface=vlan [description=description] [ipaddress=ipadd] [macaddress=macadd]
■ The IP address is the main identifier in the static entry. It must be unique. You can specify the add command multiple times to specify multiple IP
addresses for a single MAC address. It is also possible to have a single IP address resolve itself to duplicate MAC addresses, although not recommended.
■ If you specify a MAC address without specifying an IP address, this associates the MAC address with an IP address of 0.0.0.0. You can only associate one
MAC address with the IP address 0.0.0.0. The switch will make no attempt to resolve the MAC address.
■ If you specify an IP address without specifying a MAC address, the switch attempts to resolve the address by ARPing. If there are multiple MAC addresses
for the IP address, the switch uses the first ARP reply.
■ If you specify both an IP address and a MAC address, the switch does not attempt to resolve the addresses. Even if it later dynamically learns a different IP
address for that MAC address, the static entry takes precedence. However, if the switch learns of a discrepency, it now produces a log entry. You should
investigate the discrepency—it is likely to be because of a configuration error.
■ The command delete macff server now allows you to identify the server to delete by entering only its IP address. If the MAC address is not associated with
an IP address, you can instead enter only the MAC address.
■ Debugging is now on a global basis, not a per-interface basis. Therefore, the commands are now enable macff debug=options and
disable macff debug=options. Also, information about debugging options has been removed from the output of show macff interface and instead put in
the output of show macff [counters].