Quick Reference Guide

PowerConnect B-Series TI24X Configuration Guide 591
53-1002269-02
Configuring IP parameters – Layer 3 Switches
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Static entries are useful in cases where you want to pre-configure an entry for a device that is not
connected to the Layer 3 Switch, 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 address.
NOTE
You cannot create static ARP entries on a Layer 2 Switch.
The maximum number of static ARP entries you can configure depends on the software version
running on the device. Refer to “Changing the maximum number of entries the static ARP table
can hold” on page 591.
To display the ARP cache and static ARP table, refer to the following:
• To display the ARP table, refer to “Displaying the ARP cache” on page 628.
• To display the static ARP table, refer to “Displaying the static ARP table” on page 629.
To create a static ARP entry, enter a command such as the following.
PowerConnect(config)#arp 1 192.53.4.2 1245.7654.2348 e 2
Syntax: arp <num> <ip-addr> <mac-addr> ethernet <portnum>
The <num> parameter specifies the entry number. You can specify a number from 1 up to the
maximum number of static entries allowed on the device.
The <ip-addr> command 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 <portnum> command specifies the port number attached to the device that has the MAC
address of the entry.
Changing the maximum number of entries the static ARP table can hold
NOTE
The basic procedure for changing the static ARP table size is the same as the procedure for changing
other configurable cache or table sizes. Refer to the section “Displaying and modifying system
parameter default settings” on page 184
To increase the maximum number of static ARP table entries you can configure on a Layer 3
Switch, enter commands such as the following at the global CONFIG level of the CLI.
PowerConnect(config)#system-max ip-static-arp 1000
PowerConnect(config)#write memory
PowerConnect(config)#end
PowerConnect#reload
NOTE
You must save the configuration to the startup-config file and reload the software after changing the
static ARP table size to place the change into effect.
Syntax: system-max ip-static-arp <num>