Cisco DHCP Snooping
- Cisco switch listens to dhcp traffic and protects against rogue DHCP servers.
Example - for 48 port switch with uplinks on 49-51 and router with ip helper on 1 and pc's in vlan 64
ip dhcp snooping ip dhcp snooping vlan 64 ip dhcp snooping information option format remote-id hostname int range Gig 1/0/49-52 , Gig 1/0/1 ip dhcp snooping trust
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- Monitor with
sh ip dhcp snooping sh ip dhcp snooping binding sh ip dhcp snooping database