TCP Window Size, Checksum and Urgent Pointer.SCTP (Stream Control Transmission Protocol).How to Configure DHCP on Cisco Routers?.DHCP Snooping Configuration on Packet Tracer.ISIS Configuration Example on Cisco IOS.ISIS For IPv6 Configuration on Cisco IOS.BGP Peers, BGP Sessions and BGP Messages.Cisco BGP Route Reflector Config on GNS3.Frame Relay Point-to-Point Configuration.Frame-Relay Configuration with both Inverse-ARP and Frame-Relay Map.Inter VLAN Routing Configuration Example.EIGRP Packet Types and Neighbourship Establishment.BFD (Bidirectional Forwarding Detection).IPv6 Static and Default Route Configuration.IPv6 NDP (Neighbour Discovery Protocol).Single Area OSPF Configuration on Cisco IOS.OSPF Virtual-Link Configuration On Packet Tracer.Access Control Lists for Traffic Control.Standard ACL Configuration With Packet Tracer.Switch(config-if)# ip dhcp snooping limit rate 20 If this rate exceeds the configured one, the traffic is dropped. We can also set DHCP Requests that can be received in a second. There is one more important configuration steps here. Switch(config-if)# ip dhcp snooping trust Switch(config)# interface fastethernet 0/1 We will go to the interface that is connected to the router and set it as trusted port with “ ip dhcp snooping trust” command. The port on the switch that is connected to the DHCP Server (router). Here, simply, we will set one trusted port. One of them is trusted and the other is untrusted. In DHCP Snooping mechanims there are wo port types as we have talke about before in the DHCP Snooping lesson. Here, we will enable DHCP Snooping, globally. DHCP Snooping can be enabled globallay with “ip dhcp snooping” command or it can be enabled on a specific or a range of VLANs with “ ip dhcp snooping vlan vlan-id” command.
Here, we will enable DHCP Snooping on the switch.
And our DHCP Pool addresses will be the ip address in 192.168.0.0/24 block. Our DHCP Server will be the router above. Secondly, we will create our DHCP Server with DHCP Pool with the name XYX.
Router(config)# interface fastethernet 0/1 Now, let’s focus on our DHCP Snooping Example and learn DHCP Snooping Config step by step.įirstly, we will configure interace ip addresses of the router and the switch. We will do the configuration below step by step: In this lesson, we will learn How to use this important mechanims and How to Configure DHCP Snooping on Cisco swithes.įor our DHCP Snooping Configuration Example, we will use the below simple topology: How to Configure DHCP Snooping on Cisco Switches?ĭHCP Snooping Configuration is an important security mechanims towards any malicious DHCP attacks.
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