I added 'trust' under f0/24 and pc received an ip address, there was a dhcp snooping binding. I removed 'trust', release an ip from the pc and pc did not get an ip. that's great however the switch did NOT report anything on the screen and in the stats I cannot see any dropped dhcp messages? I tried on two Cisco switches...
Switch#sh ip dhc snooping stat det Packets Processed by DHCP Snooping = 22 Packets Dropped Because IDB not known = 0 Queue full = 0 Interface is in errdisabled = 0 Rate limit exceeded = 0 Received on untrusted ports = 0 Nonzero giaddr = 0 Source mac not equal to chaddr = 0 No binding entry = 0 Insertion of opt82 fail = 0 Unknown packet = 0 Interface Down = 0 Unknown output interface = 0 Misdirected Packets = 0 Packets with Invalid Size = 0 Packets with Invalid Option = 0
Switch#sh ip dhcp snooping
Switch DHCP snooping is enabled DHCP snooping is configured on following VLANs: 1 DHCP snooping is operational on following VLANs: 1 DHCP snooping is configured on the following L3 Interfaces:
Insertion of option 82 is disabled circuit-id default format: vlan-mod-port remote-id: 0019.e8a3.df80 (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:
I know this post is very old but I also have the same issue. Were you able to resolve it?
What I have noticed in my setup (Catalyst 3750X) is that I get the same issue in a lab environment setup with the switch logging to it's local log.
If I put the switch into a more complex live setup, logging to Unix Syslog via the logging traps and logging facility global configuration commands, then I do get the events logged to my Syslog server and the statistics are incremented as expected.
It is as if the logging/statistics are bypassed if the switch is only logging locally. I'm not sure if this is a bug or by design.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...