OSPF Configuration Commands 459key: Specifies the MD5 authentication key. If it is input in a plain text form, MD5key is a character string in the range 1 to 16 characters. It will be displayed in acipher text form in a length of 24 characters when the displaycurrent-configuration command is executed. Inputting the MD5 key in a ciphertext form with 24 characters is also supported.DescriptionUse the vlink-peer command to create and configure a virtual link.Use the undo vlink-peer command to cancel an existing virtual link.According to RFC2328, the OSPF area should be connected with the backbonenetwork. You can use the vlink-peer command to keep the connectivity. Virtuallink can be regarded as a common OSPF-enabled interface so that you can easilyunderstand why to configure the parameters such as Hello, retransmit, andtrans-delay on it.One thing should be mentioned. When configuring virtual link authentication, theauthentication-mode command is used to set the authentication mode as MD5cipher text or simple text on the backbone network.Related command: authentication-mode, display ospf.Example# Create a virtual link to 10.110.0.3 and use the MD5 cipher authentication mode.[3Com-ospf-1] area 10.0.0.0[3Com-ospf-1-area-10.0.0.0] vlink-peer 10.110.0.3 md5 3 345# Specify this virtual link to run Fast Hello function and send five Hello packets.[3Com-ospf-1-area-10.0.0.0] vlink-peer 10.110.0.3 dead minimalmulti-hello 5
