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Cisco Bug: CSCum52399 - Fixing EIGRP to take Interface MTU as default Max-Packet Size

Last Modified

Oct 26, 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 7700 10-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch

Known Affected Releases


Description (partial)

In 6.2.2, the default EIGRP mtu is 16384 regardless of the interface MTU. If system receives  large update packets  then  they will get fragmented. The CoPP on the  nexus can drop these fragments  as they get  classified under default-class of CoPP.  These fragments are not considered as EIGRP packets being fragmented packets.

EIGRP MTU is 16384.
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