Network Management

 View Only
Back to discussions
Expand all | Collapse all

DHCP Snooping not working correctly, why?

This thread has been viewed 2 times

  • 1.  DHCP Snooping not working correctly, why?

    Posted 6 hours ago

    Hi, 

    we had DHCP-Snooping enabled in our Network for a while now and so far we didnt notice any Problems.
    i configured that via central but i doubt the switches ned it for the actual task, so that shouldnt matter here.

    This is the config that runs on all of our Switches:
    And today we had a problem with one client acting as a new DHCP server on 192.168.0.1 that this particular switch seemingly ignored?

    this is the device i found via wireshark and i traced it back via mac to this Port here:


    which, as you see, should be in the untrusted Port Range of 1-48.

    so why was this MAC even allowed to send DHCP here? as far as i see it, it shoudlve been stopped right at that switch for being on the wrong port AND being not an authorized Server.



Related Content