Let's Lab. IS-IS routing protocol. Part 3

Hi, Habr!

Have you ever tried to shoot a bow? Probably not the most popular activity. What about skates and rollers? Hundreds of times I have seen people, equipped with all sorts of protective devices on all parts of the body, subject to the worldwide law of injury, cause themselves injuries. Whereas experienced athletes ride for months without a single fall.

All because of the lack of practice. Spend at least a month behind the books, and, probably, you will achieve less than in 2 weeks with a lab on the subject studied.
')
IS-IS can easily be called a strange protocol. But he is only in theory. In practice, we encounter the same problems that kept us safe while using other IGP protocols. Its main goal is to distribute routing information and make decisions on its addition to the routing table.

This release was longer than I expected. More than an hour of information, not everyone is able to master at one time. Due to circumstances, I can not split the video into two issues.

See in this part:

- Basic IS-IS configuration on Cisco IOS and IOS-XR;
- The establishment of a neighborhood between routers;
- Debug and traffic dump analysis when a neighbor is detected;
- Protocol metric and its setting;
- Hello and Hold timers and their quirks;
- Hello-padding;
- Links with multiple access and DIS;
- Exchange between L1 and L2 bases. ATT bit value;
- Announcement of prefixes from BGP to IS-IS;
- External routes and their metrics;
- How to avoid loops when importing from L2 to L1;
- Asymmetric routing and Suboptimal routing;
- Be cool, tune the role of each link correctly.



There is no text article under the cut. Only references and references.

Your likes accelerate the exit of the 4th part.

Part 1 here
Part 2 here .

Books to read (including about OSPF)

- H.Gredler - The Complete IS-IS Routing Protocol-2005
- Abe Martey - Cisco Press - IS-IS Network Design Solutions
- Cisco Press - Routing.TCP.IP.Volume.1.2nd.Edition.Oct.2005
- Wendell Odom, Rus Healy, Denise Donohue - CCIE Routing and Switching Exam Certification Guide 4th Edition - 2009
- CCIE Routing and Switching v5.0 Official Cert Guide Volume 1

Links

Big presentation with CiscoLive about ISIS
Tuning OSPF, in tp ISPF and PRC
Excellent article about ISIS in Junos and PDU with inetzero.com
Traffic dumps
Protocols OSI, in Russian!
A little more about PDU, capaciously and with kratinkami
Deeper into PDU with wireshark
Database generation examples
Great ISIS blog with practice

With your criticism, you can influence the next issue. For the better.

PS Releases are similar to CBT Nuggets. I really like their presentation format. My respects to Jeremy Cioara .