Brocade Communications Systems ICX 7250 series, Configuration Manual

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Configuring the priority of ingress ARP packets
To configure the priority of ingress ARP packets, use the arp-internal-priority priority-value command in global configuration
mode.
The following example shows the priority of ingress ARP packets set to level 7.
Brocade(config)# arp-internal-priority 7
Displaying the ARP table
To display the ARP table, enter the show arp command.
device# show arp
Total number of ARP entries: 2
Entries in default routing instance:
No. IP Address MAC Address Type Age Port Status
1 10.1.1.100 0000.0000.0100 Dynamic 0 1/1/1*2/1/25 Valid
2 10.37.69.129 02e0.5215.cae3 Dynamic 0 mgmt1 Valid
The command displays all ARP entries in the system.
Syntax: show arp
Reverse Address Resolution Protocol configuration
The Reverse Address Resolution Protocol (RARP) provides a simple mechanism for directly-attached IP hosts to boot over the network.
RARP allows an IP host that does not have a means of storing its IP address across power cycles or software reloads to query a directly-
attached router for an IP address.
RARP is enabled by default. However, you must create a RARP entry for each host that will use the Layer 3 switch for booting. A RARP
entry consists of the following information:
• The entry number - The entry sequence number in the RARP table.
• The MAC address of the boot client.
• The IP address you want the Layer 3 switch to give to the client.
When a client sends a RARP broadcast requesting an IP address, the Layer 3 switch responds to the request by looking in the RARP
table for an entry that contains the client MAC address:
• If the RARP table contains an entry for the client, the Layer 3 switch sends a unicast response to the client that contains the IP
address associated with the client MAC address in the RARP table.
• If the RARP table does not contain an entry for the client, the Layer 3 switch silently discards the RARP request and does not
reply to the client.
How RARP Differs from BootP and DHCP
RARP, BootP, and DHCP are different methods for providing IP addresses to IP hosts when they boot. These methods differ in the
following ways:
• Location of configured host addresses
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RARP requires static configuration of the host IP addresses on the Layer 3 device. The Layer 3 device replies directly to a
host request by sending an IP address you have configured in the RARP table.
Reverse Address Resolution Protocol configuration
Brocade FastIron Layer 3 Routing Configuration Guide
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