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3Com Switch 7750 Series
Command Reference Guide – Routing Protocol Chapter 3 OSPF Configuration Commands
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key: MD5 authentication key. If you use simple text authentication key, you can input a
string containing 1 to 16 characters. When you use the display
current-configuration command to display system information, the MD5
authentication key is displayed in the form of cipher text with a length of 24 characters.
Inputting the key in the form of cipher text with a length of 24 characters is also
supported.
Description
Use 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, an OSPF area must be connected to the backbone network.
You can use the vlink-peer command to keep the connectivity. Virtual link can be
regarded as a common interface that uses OSPF because the principle for
configuring the parameters such as hello, retransmit, and trans-delay on it is similar.
Note that, when configuring virtual link authentication, you use the
authentication-mode command to specify the authentication mode as MD5 cipher
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> system-view
System View: return to User View with Ctrl+Z.
[3Com] ospf 1
[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