Command Modes INTERFACECommand History Version 9.1(0.0) Included usage information on maximum number of digest keys perinterface.Version 8.3.11.1 Introduced on the Z9000.Version 8.3.7.0 Introduced on the S4810.Version 7.6.1.0 Introduced on the S-Series.Version 7.5.1.0 Introduced on the C-Series.pre-Version6.1.1.1Introduced on the E-Series.UsageInformationUsers can configure a maximum of six digest keys on an interface. Of the available six digestkeys, the switches select the MD5 key that is common. The remaining MD5 keys are unused.To change to a different key on the interface, enable the new key while the old key is stillenabled. FTOS sends two packets: the first packet authenticated with the old key and thesecond packet authenticated with the new key. This process ensures that the neighbors learnthe new key and communication is not disrupted by keeping the old key enabled.After the reply is received and the new key is authenticated, you must delete the old key. Dellrecommends keeping only one key per interface.NOTE: The MD5 secret is stored as plain text in the configuration file with servicepassword encryption. Write down or otherwise record the key. You cannot learn the keyonce it is configured. Use caution when changing the key.ip ospf mtu-ignoreDisable OSPF MTU mismatch detection upon receipt of database description (DBD) packets.C-Series, E-Series, S-Series, Z-Series, S4810Syntax ip ospf mtu-ignoreTo return to the default, use the no ip ospf mtu-ignore command.Defaults Enabled.Command Modes INTERFACECommand History Version 8.3.11.1 Introduced on the Z9000.Version 8.3.7.0 Introduced on the S4810.Version 7.6.1.0 Introduced on the S-Series.Version 7.5.1.0 Introduced on the C-Series.pre-Version6.1.1.1Introduced on the E-Series.1058
