Dear all,
i got issue when implementing ip dhcp snooping. i use vlan 101 and DHCP Server is on cisco router. I use subinterface on my router. this is my topology
client <mode access> fa0/22 switch catalyst 3560 fa0/24 <mode trunk> cisco router 891.
this is my switch configuration:
CATALYST-KANTOR#show run int fa0/22
Building configuration...
Current configuration : 133 bytes
!
interface FastEthernet0/22
description LAN KANTOR LA-TO WIFI TPLINK LT.2
switchport access vlan 101
switchport mode access
end
CATALYST-KANTOR#show run int fa0/24
Building configuration...
Current configuration : 244 bytes
!
interface FastEthernet0/24
description TO ROUTER CISCO 891
switchport trunk encapsulation dot1q
switchport trunk native vlan 121
switchport trunk allowed vlan 1-1000,1331,2525,2526,2596
switchport mode trunk
ip dhcp snooping trust
end
CATALYST-KANTOR#show run | i snooping
ip dhcp snooping vlan 101
no ip dhcp snooping information option
ip dhcp snooping
ip dhcp snooping trust
CATALYST-KANTOR#
CATALYST-KANTOR#show ip dhcp snooping
Switch DHCP snooping is enabled
DHCP snooping is configured on following VLANs:
101
DHCP snooping is operational on following VLANs:
101
DHCP snooping is configured on the following L3 Interfaces:
Insertion of option 82 is disabled
circuit-id default format: vlan-mod-port
remote-id: c062.6b7e.8c00 (MAC)
Option 82 on untrusted port is not allowed
Verification of hwaddr field is enabled
Verification of giaddr field is enabled
DHCP snooping trust/rate is configured on the following Interfaces:
Interface Trusted Allow option Rate limit (pps)
----------------------- ------- ------------ ----------------
FastEthernet0/24 yes yes unlimited
Custom circuit-ids:
i also disabled the insertion of option 82, but still not working. i sure that theres no problem with my dhcp server, bcz when i disable dhcp snooping on switch, dhcp works fine.
anyone could help me?
Thanks
