Chapter 8
| General Security Measures
ARP Inspection
– 260 –
Default Setting
Disabled on all VLANs
Command Mode
Global Configuration
Command Usage
◆
When ARP Inspection is enabled globally with the
ip arp inspection
command,
it becomes active only on those VLANs where it has been enabled with this
command.
◆
When ARP Inspection is enabled globally and enabled on selected VLANs, all
ARP request and reply packets on those VLANs are redirected to the CPU and
their switching is handled by the ARP Inspection engine.
◆
When ARP Inspection is disabled globally, it becomes inactive for all VLANs,
including those where ARP Inspection is enabled.
◆
When ARP Inspection is disabled, all ARP request and reply packets bypass the
ARP Inspection engine and their manner of switching matches that of all other
packets.
◆
Disabling and then re-enabling global ARP Inspection will not affect the ARP
Inspection configuration for any VLANs.
◆
When ARP Inspection is disabled globally, it is still possible to configure ARP
Inspection for individual VLANs. These configuration changes will only become
active after ARP Inspection is globally enabled again.
Example
Console(config)#ip arp inspection vlan 1,2
Console(config)#
ip arp inspection limit
This command sets a rate limit for the ARP packets received on a port. Use the
no
form to restore the default setting.
Syntax
ip arp inspection limit
{
rate
pps
|
none
}
no ip arp inspection limit
pps
- The maximum number of ARP packets that can be processed by the
CPU per second on trusted or untrusted ports. (Range: 0-2048, where 0
means that no ARP packets can be forwarded)
none
- There is no limit on the number of ARP packets that can be
processed by the CPU.
Summary of Contents for EX-3524
Page 2: ......
Page 28: ...Figures 28 ...
Page 34: ...Section I Getting Started 34 ...
Page 58: ...Chapter 1 Initial Switch Configuration Setting the System Clock 58 ...
Page 72: ...Chapter 2 Using the Command Line Interface CLI Command Groups 72 ...
Page 156: ...Chapter 5 SNMP Commands Notification Log Commands 156 ...
Page 164: ...Chapter 6 Remote Monitoring Commands 164 ...
Page 218: ...Chapter 7 Authentication Commands Management IP Filter 218 ...
Page 268: ...Chapter 8 General Security Measures Port based Traffic Segmentation 268 ...
Page 292: ...Chapter 9 Access Control Lists ACL Information 292 ...
Page 312: ...Chapter 10 Interface Commands Power Savings 312 ...
Page 324: ...Chapter 11 Link Aggregation Commands Trunk Status Display Commands 324 ...
Page 366: ...Chapter 15 Address Table Commands 366 ...
Page 428: ...Chapter 17 VLAN Commands Configuring Voice VLANs 428 ...
Page 572: ...Chapter 25 IP Interface Commands IPv6 Interface 572 ...
Page 578: ...Section I Appendices 578 ...