Configuring IS-IS Authentication-Cisco | IS-IS Authentication
#isisauthentication #routingprotocol #configuration
In this video, you will learn how to Configure IS-IS Authentication. The IS-IS protocol, as specified in RFC 1142, provides for the authentication of Hellos and Link State Packets (LSPs) through the inclusion of authentication information as part of the LSP. This authentication information is encoded as a Type Length Value (TLV) triple.
This short video tutorial will give you a quick understanding of Configuring IS-IS Authentication.
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About IS-IS Protocol:
IS-IS allows for the configuration of a password for a specified link, an area, or a domain. Routers that want to become neighbors must exchange the same password for their configured level of authentication. A router not in possession of the appropriate password is prohibited from participating in the corresponding function (that is, it may not initialize a link, be a member of an area, or be a member of a Level 2 domain, respectively).
Cisco IOS® software allows three types of IS-IS authentication to be configured.
-IS-IS Authentication – For a long time, this was the only way to configure authentication for IS-IS.
-IS-IS HMAC-MD5 Authentication – This feature adds an HMAC-MD5 digest to each IS-IS protocol data unit (PDU). It was introduced in Cisco IOS software version 12.2(13)T and is only supported on a limited number of platforms.
-Enhanced Clear Text Authentication – With this new feature, clear-text authentication can be configured using new commands that allow passwords to be encrypted when the software configuration is displayed. It also makes passwords easier to manage and change.
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