ISIS
IS-IS is a link-state routing protocol designed for large service provider and enterprise backbone networks to move data packets.
ISIS Overload – Learn with a practical example
1. Intro The Overload statement causes the routing device to continue participating in IS-IS routing, but prevents it from being used for transit traffic. It is useful sometimes to deviate the traffic away from a particular router, so we can avoid traffic being impacted. We typically have 2 scenarios: Bonus scenario: ISIS will make this […]
ISIS – PDUs and Wireshark sample packets
Intermediate systems send and receive packets and relay (forward) packets. ISO packets are called ISIS Protocol Data Unit packets, or in short ISIS PDU. There are four PDU types and all share a common header. This common header has the same structure and information for all four PDU types, except the ‘PDU Type’ filed as […]