CLI Guide
ip ospf message-digest-key
Enable OSPF MD5 authentication and send an OSPF message digest key on the interface.
Syntax
ip ospf message-digest-key keyid md5key
To delete a key, use the no ip ospf message-digest-key keyid command.
Parameters
keyid Enter a number as the key ID. The range is from 1 to 255.
key Enter a continuous character string as the password.
Defaults No MD5 authentication is congured.
Command Modes INTERFACE
Supported Modes Full—Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information
You can congure a maximum of six digest keys on an interface. Of the available six digest keys, the switches
select the MD5 key that is common. The remaining MD5 keys are unused.
To change to a dierent key on the interface, enable the new key while the old key is still enabled. The system
sends two packets: the rst packet authenticated with the old key and the second packet authenticated with the
new key. This process ensures that the neighbors learn the new key and communication is not disrupted by
keeping the old key enabled.
After the reply is received and the new key is authenticated, delete the old key. Dell recommends keeping only one
key per interface.
NOTE: The MD5 secret is stored as plain text in the conguration le with service password
encryption. Write down or otherwise record the key. You cannot learn the key once it is congured. Use
caution when changing the key.
ip ospf mtu-ignore
Disable OSPF MTU mismatch detection upon receipt of database description (DBD) packets.
Syntax
ip ospf mtu-ignore
To return to the default, use the no ip ospf mtu-ignore command.
Defaults Enabled.
Command Modes INTERFACE
Supported Modes Full—Switch
Open Shortest Path First (OSPFv2 and OSPFv3) 923