Showing posts with label ISIS. Show all posts
Showing posts with label ISIS. Show all posts
Thursday, 3 November 2022

OSPF vs ISIS- Which Routing Protocol for your needs?

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OSPF and ISIS are two popular link-state routing protocols used in large-scale networks. Both protocols have similarities and differences in...
Wednesday, 11 November 2020

ISIS Series- Part 8: ISIS Configuration

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  Configuration In this lab we will configure IS-IS to carry IP routes. The IS-IS Lab Files include the initial and final configs for the t...
Sunday, 25 October 2020

ISIS Series- Part 7: ISIS Adjacencies

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Adjacancies IS-IS uses Protocol Data Units, or PDU’s to communicate. This is like a packet in OSPF terminology. An IS-IS Hello PDU, or IIH, ...
Friday, 11 September 2020

ISIS Series- Part 6: ISIS NET Value

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NET Value A Network Entity Title, or ‘NET’, is an address that identifies the router. It consists of the router’s system ID, and the area a...
Tuesday, 18 August 2020

ISIS Series- Part 5: ISIS Inter-Area Routing

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Inter-Area Routing To route a packet outside an area, a level 1 router sends the packet to the nearest level 2 capable router. The nearest r...
Tuesday, 7 July 2020

ISIS Series- Part 4: ISIS Router Levels

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Level 1 routers will only share routing information with other Level 1 routers. This makes them stub routers. In the topology above, area 40...
Friday, 19 June 2020

ISIS Series- Part 3: ISIS Areas

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Like OSPF, IS-IS uses areas. Areas can be either a backbone area, or normal area. To support this concept, a router may be one of the follow...
Saturday, 9 May 2020

ISIS Series- Part 2: ISIS Components

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As the history of IS-IS is in the OSI stack, some of the components are a bit different to what we’re used to in the TCP/IP world. Let’s cl...
Sunday, 12 April 2020

ISIS Series- Part 1: Introduction to ISIS

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IS-IS, or Intermediate System to Intermediate System, is an open standard routing protocol. ISO published the standard as a way to route dat...