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How to configure the keychain for the IS-IS

Latest reply: Dec 20, 2018 03:07:16 684 4 10 0 0

As we know that IS-IS support multi authentication. It is classified as follows:

Based on packet types, the authentication is classified as follows:

l  Interface authentication: is configured in the interface view to authenticate Level-1 and Level-2 IS-to-IS Hello PDUs (IIHs).

l  Area authentication: is configured in the IS-IS process view to authenticate Level-1 CSNPs, PSNPs, and LSPs.

l  Routing domain authentication: is configured in the IS-IS process view to authenticate Level-2 CSNPS, PSNPs, and LSPs.

Based on the authentication modes of packets, the authentication is classified into the following types:

l  Simple authentication: The authenticated party directly adds the configured password to packets for authentication. This authentication mode provides the lowest password security.

l  MD5 authentication: uses the MD5 algorithm to encrypt a password before adding the password to the packet, which improves password security.

l  Keychain authentication: further improves network security with a configurable key chain that changes with time.

l  HMAC-SHA256 authentication: uses the HMAC-SHA256 algorithm to encrypt a password before adding the password to the packet, which improves password security.

The keychain authentication is more secure,we can configure it as below:


keychain core mode absolute


 key-id 1

  algorithm hmac-md5

  key-string cipher   Huawei@123456

  send-time 00:00   2018-12-01 duration infinite

  receive-time 00:00   2018-12-01 duration infinite


isis 1

domain-authentication-mode keychain core


interface interface-type interface-number

isis authentication-mode keychain core




Note: when we configure the keychain authentication, the algorithm is must been configured.

  • x
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Created Dec 20, 2018 01:49:39

It is very helpful on configuring the key chain for IS-IS
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Created Dec 20, 2018 02:09:40

It is very helpful
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Created Dec 20, 2018 02:51:40

MD5 is an outdated algorithm and proved to be not secure, it's recommended to use more secure algorithms like SHA series..How to configure the keychain for the IS-IS-2824085-1
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  • x
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Created Dec 20, 2018 03:07:16

What does MD5 mean? Can you introduce it?
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  • x
  • convention:


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