Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 787)

Multi-Service IronWare Switching Configuration Guide 757
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Dynamic ARP inspection
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Brocade(config)# interface ethernet 1/4
Brocade(config-if-e10000-1/4)# arp-inspection-trust
The commands change the CLI to the interface configuration level of port 1/4 and set the trust
setting of port 1/4 to trusted.
Syntax: [no] arp-inspection-trust
Creating ARP entries
Static entries are useful in cases where you want to pre-configure an entry for a device that is not
connected to the Brocade device, or you want to prevent a particular entry from aging out. The
software removes a dynamic entry from the ARP cache if the ARP aging interval expires before the
entry is refreshed. Static entries do not age out, regardless of whether the device receives an ARP
request from the device that has the entry’s address.
To create a static ARP entry for a static MAC entry, enter a command such as the following.
Brocade(config)# arp 10.53.4.2 1245.7654.2348 vlan 10
The command adds a static ARP entry that maps IP address 10.53.4.2 to MAC address
1245.7654.2348. The entry is for a MAC address connected to VLAN 10 of the Brocade device.
Syntax: [no] arp ip-addr mac-addr [ethernet slot/port l vlan vlan_id ]
The ip-addr parameter specifies the IP address of the device that has the MAC address of the entry.
The mac-addr parameter specifies the MAC address of the entry.
The ethernet slot/port command specifies the port number attached to the device that has the
MAC address of the entry.
The vlan vlan_id variable specifies the ID of a configured VLAN or VLAN range. Valid VLAN ranges
are 1-4090.
Creating multi-port ARP entries
On the Brocade devices, multiple ports belonging to the same VE can be assigned to a single static
ARP.
NOTE
The multi-port ARP feature can be used in a pure Layer 3 forwarding environment to forward IPv4
traffic to multiple ports and should not be used in conjunction with Multi-port static MAC.
To create a multi-port static ARP entry, enter a command such as the following.
Brocade(config)# arp 10.53.4.2 1245.7654.2348 multi-ports ethernet 2/1 to 2/7
ethernet 3/1 to 3/2
The command above adds a static ARP entry that maps IP address 10.53.4.2 to MAC address
1245.7654.2348. If all conditions are met and the multi-port static ARP entry is instantiated in the
dynamic ARP table, then packets with a destination IP address of 10.53.4.2 will be sent out on
Ethernet ports 2/1-2/7 and 3/1-3/2.
Syntax: [no] arp <ip address> <mac address> [<port> | multi-ports ethernet [<slot1/port1> |
[<slot1/port1> to <slot1/port>] .. ethernet [slot/port to slot/port>]]
The ip-addr parameter specifies the IP address of the device that has the MAC address of the entry.
The mac-addr parameter specifies the MAC address of the entry.