ISIS – Maximum path

Today my friend asked me why he could not see all the vlans available in IS-IS when he issued show ip route isis command. When I saw it, it turned out that there are four paths leading to the same destination and they are doing load balancing. The default IS-IS equal paths is 4, you … Continue reading ISIS – Maximum path

Intermediate System-Intermediate System Basics

Conditions to form IS-IS adjacency 1. MTU must match. 2. IS level must match. Level 1 and level 1 router can form adjacency, level 1 router can form adjacency with level1/2 router this is because this router has two IS databases and one is level 1 database. Level 2 and level 2 router can form … Continue reading Intermediate System-Intermediate System Basics