Arp cache table, Static arp table – Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) User Manual
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Multi-Service IronWare Switching Configuration Guide
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The IP packet flow
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The software enables you to display the ARP cache and static ARP table, the IP route table, the IP
forwarding cache.
You also can change the capacity of the following tables by changing the memory allocation for the
table:
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ARP cache table
The Address Resolution Protocol (ARP) is supported on the Brocade device. Refer to
The ARP cache contains entries that map IP addresses to MAC addresses. Generally, the entries
are for devices that are directly attached to the Brocade device.
An exception is an ARP entry for an interface-based static IP route that goes to a destination that is
one or more router hops away. For this type of entry, the MAC address is either the destination
device’s MAC address or the MAC address of the router interface that answered an ARP request on
behalf of the device, using proxy ARP.
The ARP cache can contain dynamic (learned) entries and static (user-configured) entries. The
software places a dynamic entry in the ARP cache when the Brocade device learns a device’s MAC
address from an ARP request or ARP reply from the device.
The software can learn an entry when the Brocade device receives an ARP request from another IP
forwarding device or an ARP reply.
Example : Dynamic entry
Each entry contains the destination device’s IP address and MAC address.
Static ARP table
In addition to the ARP cache, the Brocade device has a static ARP table.
Entries in the static ARP table are user-configured. You can add entries to the static ARP table
regardless of whether the device the entry is for is connected to the Brocade device.
The software places an entry from the static ARP table into the ARP cache when the entry’s
interface comes up.
Example : Static ARP entry
Index IP Address MAC Address Port
1 10.95.6.111 0800.093b.d210 1/1
Each entry lists the information you specified when you created the entry.
To display ARP entries, refer to the following:
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IP Address MAC Address Type Age Port
1 10.95.6.102 0800.5afc.ea21 Dynamic 0 6