O'Reilly logo

JUNOS Automation Cookbook by Adam Chappell

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

ISIS primer

ISIS is the link-state routing protocol of choice in the OSI suite. Though the OSI protocol suite never came to be at a global internet scale, it does hold some interesting contrasts when compared to the TCP/IP protocol suite that we're all very much accustomed to. In summary, the key features of the OSI suite are:

  • Multi-domain, multi-area, multi-level addressing, with variable length addressing fields, but fixed hierarchy
  • Node-based addressing rather than interface-based addressing

Despite the difference in underlying the transport protocol suite, ISIS found popularity on large-scale service-provider networks during the years that the IETF were still standardising OSPF. Today, it is a first-class link-state routing protocol ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required