Command Line Interface
4-194
4
• If static mode is not enabled, packets are first validated against the specified
ARP ACL. Packets matching a deny rule are dropped. All remaining packets
are validated against the address bindings in the DHCP snooping database.
Example
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 filter sales vlan 1
Console(config)#
Console(config)#ip arp inspection validate dst-mac
Console(config)#
Содержание 6152PL2 FICHE
Страница 2: ......
Страница 6: ...vi ...
Страница 8: ...viii ...
Страница 32: ...Tables xxxii ...
Страница 38: ...Figures xxxviii ...
Страница 56: ...Initial Configuration 2 10 2 ...
Страница 378: ...Configuring the Switch 3 322 3 ...
Страница 651: ...Address Table Commands 4 273 4 Example Console show mac address table aging time Aging time 100 sec Console ...
Страница 817: ......
Страница 818: ...SMC6128PL2 SMC6152PL2 149100000007A R01 ...