Chapter 8
| General Security Measures
ARP Inspection
– 259 –
ip arp inspection
validate
This command specifies additional validation of address components in an ARP
packet. Use the
no
form to restore the default setting.
Syntax
ip arp inspection validate
{
dst-mac
[
ip
] [
src-mac
] |
ip
[
src-mac
] |
src-mac
}
no ip arp inspection validate
dst-mac
- Checks the destination MAC address in the Ethernet header
against the target MAC address in the ARP body. This check is performed
for ARP responses. When enabled, packets with different MAC addresses
are classified as invalid and are dropped.
ip
- Checks the ARP body for invalid and unexpected IP addresses.
Addresses include 0.0.0.0, 255.255.255.255, and all IP multicast addresses.
Sender IP addresses are checked in all ARP requests and responses, while
target IP addresses are checked only in ARP responses.
src-mac
- Checks the source MAC address in the Ethernet header against
the sender MAC address in the ARP body. This check is performed on both
ARP requests and responses. When enabled, packets with different MAC
addresses are classified as invalid and are dropped.
Default Setting
No additional validation is performed
Command Mode
Global Configuration
Command Usage
By default, ARP Inspection only checks the IP-to-MAC address bindings specified in
an ARP ACL or in the DHCP Snooping database.
Example
Console(config)#ip arp inspection validate dst-mac
Console(config)#
ip arp inspection vlan
This command enables ARP Inspection for a specified VLAN or range of VLANs. Use
the
no
form to disable this function.
Syntax
[
no
]
ip arp inspection vlan
{
vlan-id
|
vlan-range
}
vlan-id
- VLAN ID. (Range: 1-4093)
vlan-range
- A consecutive range of VLANs indicated by the use a hyphen,
or a random group of VLANs with each entry separated by a comma.
Содержание EX-3524
Страница 2: ......
Страница 28: ...Figures 28 ...
Страница 34: ...Section I Getting Started 34 ...
Страница 58: ...Chapter 1 Initial Switch Configuration Setting the System Clock 58 ...
Страница 72: ...Chapter 2 Using the Command Line Interface CLI Command Groups 72 ...
Страница 156: ...Chapter 5 SNMP Commands Notification Log Commands 156 ...
Страница 164: ...Chapter 6 Remote Monitoring Commands 164 ...
Страница 218: ...Chapter 7 Authentication Commands Management IP Filter 218 ...
Страница 268: ...Chapter 8 General Security Measures Port based Traffic Segmentation 268 ...
Страница 292: ...Chapter 9 Access Control Lists ACL Information 292 ...
Страница 312: ...Chapter 10 Interface Commands Power Savings 312 ...
Страница 324: ...Chapter 11 Link Aggregation Commands Trunk Status Display Commands 324 ...
Страница 366: ...Chapter 15 Address Table Commands 366 ...
Страница 428: ...Chapter 17 VLAN Commands Configuring Voice VLANs 428 ...
Страница 572: ...Chapter 25 IP Interface Commands IPv6 Interface 572 ...
Страница 578: ...Section I Appendices 578 ...
Страница 594: ...Appendix C Customer Support Manuals 594 ...