Cisco Nexus 3548

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Cisco Nexus 3548 Switch NX-OS Unicast Routing Command Reference
OL-27852-01
Chapter Unicast Routing Commands
ip ospf mtu-ignore
ip ospf mtu-ignore
To disable Open Shortest Path First (OSPF) maximum transmission unit (MTU) mismatch detection on
received Database Descriptor (DBD) packets, use the ip ospf mtu-ignore command. To return to the
default, use the no form of this command.
ip ospf mtu-ignore
no ip ospf mtu-ignore
Syntax Description This command has no arguments or keywords.
Command Default OSPF MTU mismatch detection is enabled.
Command Modes Interface configuration mode
Command History
Usage Guidelines By default, OSPF checks whether neighbors are using the same MTU on a common interface. If the
receiving MTU is higher than the IP MTU configured on the incoming interface, OSPF does not establish
adjacencies. Use the ip ospf mtu-ignore command to disable this check and allow adjacencies when the
MTU value differs between OSPF neighbors.
This command requires the LAN Base Services license.
Examples This example shows how to disable MTU mismatch detection on received DBD packets:
switch# configure terminal
switch(config)# interface ethernet 1/2
switch(config-if)# no switchport
switch(config-if)# ip ospf mtu-ignore
switch(config-if)#
Related Commands
Release Modification
5.0(3)A1(1) This command was introduced.
Command Description
show ip ospf Displays general information about OSPF routing instances.
show ip ospf interface Displays OSPF-related interface information.