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Cisco Bug: CSCuj80315 - Main interface MTU refered instead of subinterface ipv4 mtu for OSPF LSU

Last Modified

Nov 27, 2020

Products (1)

  • Cisco 12000 Series Routers

Known Affected Releases


Description (partial)

GSR XR box sending 1552byte OSPF LSUpdates unfragmented without honoring IPv4 mtu (1500 bytes) settings on sub interfaces. Using the physical MTU set on main interface (mtu 1600bytes) instead.

Main interface MTU set higher  than subinterface ipv4 interface setting.
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