Juniper IGP - CONFIGURATION GUIDE V11.1.X, Configuration Manual

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Configures an interface already created, or creates a new OSPF interface and
configures the MD5 key. The interface can have an IP address, or it can be
unnumbered.
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Example
host1(config-router)# address 10.1.1.1 message-digest-key 1 md5 0 9mwk6gdr76
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Use the no version to delete the MD5 key.
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See address message-digest-key md5
area virtual-link authentication-key
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Use to configure a simple password for a virtual link.
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You can specify whether the key is entered in unencrypted or encrypted format.
If you do not specify which, the string is assumed to be unencrypted.
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The password can be up to eight characters long.
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Example
host1(config-router)# area 27.0.0.0 virtual-link 27.3.4.5 authentication-key
sadsa29c
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Use the no version to remove the password.
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See area virtual-link authentication-key
area virtual-link authentication message-digest
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Use to specify that MD5 authentication is used for the particular virtual link.
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You must configure the MD5 key ID and password with the area virtual-link
message-digest-key md5 command.
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Switching between authentication types does not delete a configured MD5 key
ID or password; only using the
no version of that configuration command can
delete the MD5 key ID and password.
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Example
host1(config-router)# area 27.0.0.0 virtual-link 27.2.3.4 authentication
message-digest
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Use the no version to set authentication for the virtual link to none without
removing any configured MD5 key. You can subsequently apply MD5
authentication to the virtual link without having to reconfigure the key.
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See area virtual-link authentication message-digest
area virtual-link authentication-none
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Use to specify that no authentication is used for the particular virtual link.
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Example
host1(config-router)# area 27.0.0.0 virtual-link 27.2.3.4 authentication-none
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Configuring Authentication
JUNOSe 11.0.x IP, IPv6, and IGP Configuration Guide