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DHCP packets are dropped due to high packet rate

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  • 1.  DHCP packets are dropped due to high packet rate

    Posted Apr 11, 2016 04:42 AM

    Hi all.

    The last few days the following message has started appearing in the logs of our two E3800 distribution switches:

    W 04/11/16 08:22:33 02698 dhcp-snoop: backplane: DHCP packets are dropped at port 25 due to high packet rate.

    Port 25 is a 10G connection to our core switch. Has anyone come across this before? The switches are running software KA.16.01.0004

     


    #DHCP


  • 2.  RE: DHCP packets are dropped due to high packet rate

    Posted Apr 15, 2016 08:13 PM

    Hello.  There is a 100 pkts/sec rate-limit on DHCP packets with DHCP-snooping enabled, it's a DoS protection mechanism.  It's been in place for some time however the log message is new for X.16.01. 



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