Hello,
We are facing an issue while configuring DHCP snooping.
We are configuring DHCP snooping on "Access SW" C2960X Software (C2960X-UNIVERSALK9-M), Version 15.0(2), we have multiple VLANs in our network. And for some VLAN we
have configure DHCP on "Dist. SW"Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M), Version 03.04.00.SG RELEASE SOFTWARE (fc3) and for remaining VLANs we have configured
DHCP on freeBSD.
When we enable DHCP snooping everything working fine for those vlans which are getting DHCP ip from freeBSD, but for vlans which have DHCP on Dist. SW client are unable to get IP.
VLAN2: DHCP on freeBSD // working fine
VLAN3: DHCP on Dist. SW // not working
VLAN4: DHCP on freeBSD //working fine
Access-SW#sh ip dhcp snooping
Switch DHCP snooping is enabled
DHCP snooping is configured on following VLANs:
2,3,4
DHCP snooping is operational on following VLANs:
2,3,4
DHCP snooping is configured on the following L3 Interfaces:
Insertion of option 82 is enabled
circuit-id default format: vlan-mod-port
remote-id: xxx.xxxx.xxxx (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)
----------------------- ------- ------------ ----------------
GigabitEthernet1/0/24 yes yes unlimited
VALN3 clients are unable to get DHCP IP. Only able ot get IP when we disable IP DHCP snooping
Can anyone help me to figure it out what is the issue.
snooping is only enable on Access SW.
Regards,