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Cisco Bug: CSCuj06468 - N7k/6.2(2) - DHCP packet classified as type "NON-DHCP"

Last Modified

Feb 24, 2018

Products (7)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7700 18-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch
  • Cisco Nexus 7700 10-Slot Switch

Known Affected Releases


Description (partial)

DHCP Relay would not work after upgrade to 6.2(2) for DHCP Requests if source UDP port is not "bootpc" (68), for example such a DHCP Discover is classified as non DHCP packet:-
User Datagram Protocol, Src Port: 57907 (57907), Dst Port: bootps (67)

switch# sh ip dhcp relay statistics
Total Packets Received                           :     45456
Total Packets Forwarded                          :     45456

Only for DHCP packets using non bootp UDP source port. For example such a packet would not hit the problem:
User Datagram Protocol, Src Port: bootpc (68), Dst Port: bootps (67)

Issue only observed with 6.2(2) OS release and any release prior to it is not affected.
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