Articles by tag "DHCP Snooping"

1. Can a Cisco Catalyst 9300 Be Configured for DHCP?
   Selene Gong

   43
   The Cisco Catalyst 9300 series switches can indeed be configured for Dynamic Host Configuration Protocol (DHCP) services. They can operate as a DHCP Server to assign IP configurations to clients or as a DHCP Relay Agent to forward DHCP messages across network segments. This flexibility helps ...
2. Mastering Dynamic ARP Inspection (DAI) on Cisco Switches
   Selene Gong

   43
   The Address Resolution Protocol (ARP) is fundamental to network communication within a Layer 2 broadcast domain, responsible for mapping IP addresses to MAC addresses. However, ARP is inherently vulnerable because it allows any host to send a "gratuitous reply" or forged ARP packet, a technique ...
3. Cisco Catalyst 9200/9300/1300 Security Hardening Guide: DHCP Snooping, DAI and IP Source Guard
   Selene Gong

   18
   Quick Take DHCP Snooping, Dynamic ARP Inspection, and IP Source Guard work as a security chain. DHCP Snooping builds the IP-to-MAC binding database, DAI validates ARP traffic against that database, and IP Source Guard restricts unauthorized source IP traffic. Catalyst 9200/9300 IOS XE ...