Dell BigIron RX Series, Configuration Manual

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BigIron RX Series Configuration Guide 189
53-1002253-01
Configuring ARP parameters
7
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The interface level configuration overrides the global configuration for a specific port.
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The command is supported on Layer 3 Switches only.
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There is no default value for <rate>. Enter 0–30,000.
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If the value of <rate> is entered as 0, the interface will stop processing ARP packets
immediately.
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You can go to interface trunk mode to configure the ARP port rate limit. When configured over
trunk interface (i.e. on the lead port) the same limit will be configured on each and every port
in the trunk.
•
ARP rate limiting is only supported on physical interfaces (virtual interfaces (ve) are not
supported).
Setting the rate limit to ARP packets on an interface
You can limit the number of ARP packets the device will accept each second by entering the
arp-port-rate-limit command. However, if you want to apply a limit on the rate that ARP packets flow
on an interface of a Layer 3 Switch, enter a command such as the following.
BigIron RX(config)#interface ethernet 1/4
BigIron RX(config-vif-10)#arp-port-rate-limit 2000
Syntax: [no] arp-port-rate-limit <rate>
There is no default value for <rate> . Enter 0–30,000.
Displaying the rate limit for ARP packets
To determine how many ARP packets were dropped by an interface due to the configured rate limit
for ARP packets, enter a command such as the following.
The example above displays the LP processed 50 packets every second and dropped any addtional
packets.
Syntax: show ip traffic arp
This column... Displays...
Interface The interface on the device.
Received Number of ARP packets received by the interface.
Processed Number of ARP packets processed by the interface.
Dropped (Rate-limited) Number of ARP packets dropped by the interface.
LP-1#show ip traffic arp
ARP Statistics
1400 total recv, 1400 req recv, 0 req sent
0 pending drop, 0 invalid source, 0 invalid dest
ARP Rate Limiting Statistics
Interface Received Processed Dropped(Rate-limted)
ethernet1/1 184200 700 183500
ethernet1/2 0 0 0
ethernet1/3 0 0 0
ethernet1/4 184200 700 183500