We have WS-C3560V2-24TS with IOS 15.0(2)SE5.
I am configuring dhcp snooping.
dhcp snooping enabled globally, enabled for needed vlan, option 82 disabled, only incoming interface trusted.
Clients are getting ip addresses from DHCP normally, but i dhcp snooping bindings table is empty.
can't understand why that happens.
---
show ip dhcp snoo
Switch DHCP snooping is enabled
DHCP snooping is configured on following VLANs:
1-4000
DHCP snooping is operational on following VLANs:
1,9-10,581
Smartlog is configured on following VLANs:
none
Smartlog is operational on following VLANs:
none
DHCP snooping is configured on the following L3 Interfaces:
Insertion of option 82 is disabled
circuit-id default format: vlan-mod-port
remote-id: 5897.1eee.a900 (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)
----------------------- ------- ------------ ----------------
GigabitEthernet0/1 yes yes unlimited
Custom circuit-ids:
GigabitEthernet0/2 yes yes unlimited
Custom circuit-ids:
----
Client interface:
!
interface FastEthernet0/1
switchport access vlan 581
switchport mode access
switchport nonegotiate
spanning-tree portfast
spanning-tree bpduguard enable
!
--
Incoming interface:
!
interface GigabitEthernet0/2
switchport trunk encapsulation dot1q
switchport mode trunk
ip dhcp snooping trust
!
--
Bindings
show ip dhcp snoo bin
MacAddress IpAddress Lease(sec) Type VLAN Interface
------------------ --------------- ---------- ------------- ---- --------------------
Total number of bindings: 0
