is-is router types

1, traditional router: the traditional router is a dedicated hardware device used to realize the data forwarding and routing functions of the network.

2. Layer 3 switch: Layer 3 switch is a device that supports Layer 3 forwarding function. Compared with traditional Layer 2 switches, Layer 3 switches have more powerful network architecture capabilities and wider application areas. Layer 3 switches can realize routing and network forwarding based on IP addresses or other network layer protocols, as well as traditional Layer 2 switching functions.

3. High-speed routers dedicated to ISP networks and data center networks: High-speed routers dedicated to ISP networks and data center networks are powerful, full-featured hardware devices that are widely used in network architectures based on broadband Internet services and large-scale data centers to meet the requirements of massive data forwarding and management.

IS-IS is a general-purpose Interior Gateway Protocol (IGP) for exchanging routing information between intermediate systems (IS) in an autonomous system (AS). According to the definition of the link layer in the OSI model, an IS can be a router or other device located on the LAN, and IS-IS can run on various types of routers.IS-IS supports a variety of network protocols, such as IP, CLNS, IPv6, etc., and can be used to implement different network scenarios, such as Ethernet, FDDI, and ATM.