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How to Configure DHCP Snooping for Cisco Catalyst Switch

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How to Configure DHCP Snooping for Cisco Catalyst Switch

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  1. How to Configure DHCP Snooping for Cisco Switch http://www.router-switch.com/Price-cisco-switches_c2

  2. Why need to configure DHCP Snooping In computer networking DHCP snooping allows you to create a white-list of interfaces for which trusted DHCP servers are connected. All dhcp specific traffic which passes through "untrusted" interfaces will be dropped. This will help you easy configure DHCP snooping for Cisco Catalyst switch easy. When DHCP servers are allocating IP addresses to the clients on the LAN, DHCP snooping can be configured on LAN switches to harden the security on the LAN to allow only clients with specific IP/MAC addresses to have access to the network.

  3. Configurations for Switch Switch > en Switch #conf t Switch (config)#no ip domain look Switch (config)#user cisco pr 15 pass ccie Switch (config)#ho SW1 SW1(config)#line con 0 SW1(config-line)#exec-tim 0 0 SW1(config-line)#loggsyn SW1(config-line)#exit SW1(config)#line vty 0 4

  4. SW1(config-line)#loggsyn SW1(config-line)#login loc SW1(config-line)#exec-tim 30 0 SW1(config-line)#exit SW1(config)#vlan 20 SW1(config-vlan)#exit SW1(config)#ipdhcp snooping vlan 10, SW1(config)#ipdhcp snooping

  5. SW1(config)#interface fastEthernet 0/1 SW1(config-if)#description Connect to Win2003 DHCP SW1(config-if)#switchport access vlan 10 SW1(config-if)#switchport mode access SW1(config-if)#spanning-tree portfast SW1(config-if)#ipdhcp snooping trust SW1(config-if)#interface FastEthernet0/2 SW1(config-if)#description : Connect to DHCP Client SW1(config-if)#switchport access vlan 10 SW1(config-if)#switchport mode access SW1(config-if)#spanning-tree portfast SW1(config-if)#ipdhcp snooping limit rate 15 SW1(config-if)#end SW1#wr

  6. It can applied to all Cisco Catalyst switches or, such as Cisco 2960 switches, Cisco Catalyst 3750 switches, Cisco 3850 switches, etc.

  7. Contact Us: Website: http://www.router-switch.com/ Tel: +1-626-239-8066 (USA) +852-9795-4940 / +852-3174-6166 (Hong Kong) Fax: +852-3050-1066 (Hong Kong) Email: cisco@router-switch.com (Sales Inquiries)

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