What port does IS-IS use?

IS-IS does not use a specific default port number. The protocol is defined in RFC 5308.

Unknown

Intermediate System to Intermediate System

Q: What is Intermediate System to Intermediate System?

Intermediate System to Intermediate System (IS-IS) is a Network Layer protocol in the Routing category. Link-state routing protocol operating directly over Layer 2, not IP. Preferred by large ISPs and service providers for its scalability, fast convergence, and traffic engineering capabilities.

Network Layer — Routing

نظرة عامة على البروتوكول

الاسم الكامل Intermediate System to Intermediate System

الاختصار IS-IS

طبقة OSI Network Layer

الفئة Routing

RFC RFC 5308

حول IS-IS

Link-state routing protocol operating directly over Layer 2, not IP. Preferred by large ISPs and service providers for its scalability, fast convergence, and traffic engineering capabilities.

Network Layer Routing

مرجع المعايير

IS-IS معرَّف في RFC 5308، الصادر عن فريق هندسة الإنترنت (IETF). تُعدّ RFCs الوثائق المعيارية الرسمية لبروتوكولات الإنترنت وهي متاحة مجاناً للمراجعة العامة.

البروتوكولات ذات الصلة — Network Layer

WireGuard WireGuard IPsec Internet Protocol Security IPv4 Internet Protocol version 4 IPv6 Internet Protocol version 6 ICMP Internet Control Message Protocol BGP Border Gateway Protocol OSPF Open Shortest Path First IGMP Internet Group Management Protocol