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

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Use to assign a password used by neighboring routers for OSPF simple password
authentication.
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The interface can have an IP address, or it can be unnumbered.
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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, or key, is a character string up to 8 characters long.
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Example
host1(config-router)# address 10.12.10.2 authentication-key 9rdf7
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Use the no version to delete the password from the specified interface.
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See address authentication-key
address authentication message-digest
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Use to specify that MD5 authenticaion is used for the OSPF interface.
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You must configure the MD5 key ID and password with the address
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)# address 10.12.10.2 authentication message-digest
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Use the no version to set authentication for the interface to none without
removing any configured MD5 key. You can subsequently apply MD5
authentication to the interface without having to reconfigure the key.
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See address authentication message-digest
address authentication-none
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Use to disable authentication on the interface.
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The interface can have an IP address, or it can be unnumbered.
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Example
host1(config-router)# address 192.168.10.32 authentication-none
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The no version has no effect.
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See address authentication-none
address message-digest-key md5
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Use to enable OSPF MD5 authentication and configure the MD5 key.
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The MD5 key is a character string up to 16 characters long. You must also specify
a key identifier and whether the key is entered in unencrypted or encrypted
format. If you do not specify which, the string is assumed to be unencrypted.
Configuring Authentication
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Chapter 5: Configuring OSPF