Hi to All,
I have multiple VLANs configured on a L2/L3 switch (cisco 3750) and one DHCP server configured on wan [using ip helper-address on the switch I forward the DHCP request on a L3 interface.
It' s possible / How can I enable dhcp snooping on the switch ?
It's possible / How can I configure the TRUSTED PORT (the port vs the DHCP server)
FOLLOWING THE CONFIGURATION:
SWITCH
!
!
interface GigabitEthernet1/0/1
description ** DHCP pc 192.168.2.0/24 **
switchport access vlan 2
switchport mode access
load-interval 30
!
interface GigabitEthernet1/0/2
description ** DHCP pc 192.168.2.0/24 **
switchport access vlan 2
switchport mode access
load-interval 30
!
interface GigabitEthernet1/0/3
description ** DHCP pc 192.168.2.0/24 **
switchport access vlan 2
switchport mode access
load-interval 30
!
interface GigabitEthernet1/0/24
description ** TO WAN ROUTER **
no switchport
ip address 192.168.254.254 255.255.255.252
!
!
interface Vlan2
description ** LAN **
ip address 192.168.2.254 255.255.255.0
ip helper-address 192.168.1.254
!
ip forward-protocol udp bootpc
!
IF I TRY TO CONFIGURE THE DHCP SNOOPING I CAN'T CONFIGURE THE TRUST PORT (on the "wan" interface):
SWITCH#conf t
SWITCH(config)#ip dhcp snooping vlan 2
SWITCH(config)#
SWITCH(config)#
SWITCH(config)#interface GigabitEthernet1/0/24
SWITCH(config-if)#ip dhcp ?
client DHCP client configuration
limit Limit DHCP Lease
relay DHCP relay configuration parameters
server Configure DHCP server behavior
