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Is DHCP snooping and ARP inspection the same?
Dynamic ARP inspection uses the DHCP snooping binding database for the list of valid IP-to-MAC address bindings. ARP ACLs take precedence over entries in the DHCP snooping binding database. The switch uses ACLs only if you configure them by using the ip arp inspection filter vlan global configuration command.
What does IP ARP Inspection vlan do?
You enable dynamic ARP inspection on a per-VLAN basis by using the ip arp inspection vlan vlan-range global configuration command. In non-DHCP environments, dynamic ARP inspection can validate ARP packets against user-configured ARP access control lists (ACLs) for hosts with statically configured IP addresses.
What is IP DHCP snooping vlan?
DHCP Snooping is a layer 2 security technology incorporated into the operating system of a capable network switch that drops DHCP traffic determined to be unacceptable. DHCP Snooping prevents unauthorized (rogue) DHCP servers offering IP addresses to DHCP clients.
How do I enable DHCP snooping on a vlan?
The minimum configuration steps for the DHCP snooping feature are as follows:
- Define and configure the DHCP server.
- Enable DHCP snooping on at least one VLAN.
- Ensure that DHCP server is connected through a trusted interface.
- Configure the DHCP snooping database agent.
- Enable DHCP snooping globally.
What is IP DHCP snooping?
DHCP snooping is a security feature that acts like a firewall between untrusted hosts and trusted DHCP servers. The DHCP snooping feature performs the following activities: Validates DHCP messages received from untrusted sources and filters out invalid messages.
How does DHCP snoop on static IP addresses?
Both these security measures use the database created by DHCP Snooping, and if a station is using a static IP address, there is no record about it in the DHCP Snooping database, causing that station’s traffic to be dropped. The DAI is configured using ip arp inspection commands while IPSG will exhibit itself using ip verify source commands.
How does DHCP snooping and ARP inspection work?
Arp inspection uses the dhcp binding database to protect against mac spoofing – man in the middle – attacks Before you enable arp detection you have to let dhcp snooping run for at least a lease period
How does DHCP snooping use the Binding Database?
Or DHCP snooping is using the DHCP messages to create the binding database and then it will inspection all IP packets coming from untrusted ports and compare them against the binding database? Could someone make this more clear for me? Solved!
Why does Cisco use dynamic ARP Inspection ( DAI )?
Dynamic ARP Inspection (DAI) is a security feature that validates Address Resolution Protocol (ARP) packets in a network. DAI allows a network administrator to intercept, log, and discard ARP packets with invalid MAC address to IP address bindings. This capability protects the network from certain “man-in-the-middle” attacks.