Intermediate System-to-Intermediate System. OSI link-state hierarchical routing protocol based on DECnet Phase V routing, whereby ISs (routers) exchange routing information based on a single metric, to determine network topology.
Technology Information

Design

Design TechNotes

(All IP Routing Design TechNotes)

(All IP Routing Design TechNotes)
How Does Load Balancing Work?

Intermediate System-to-Intermediate System (IS-IS) TLVs

IP Addressing and Subnetting for New Users

IS-IS Route Leaking Overview

Route Selection in Cisco Routers

Route-Maps for IP Routing Protocol Redistribution Configuration

Specifying a Next Hop IP Address for Static Routes

Understanding IS-IS Pseudonode LSP

Understanding Policy Routing

Using the Extended ping and Extended traceroute Commands

What Is Administrative Distance?

When Are ICMP Redirects Sent?

Intermediate System-to-Intermediate System (IS-IS) TLVs
IP Addressing and Subnetting for New Users
IS-IS Route Leaking Overview
Route Selection in Cisco Routers
Route-Maps for IP Routing Protocol Redistribution Configuration
Specifying a Next Hop IP Address for Static Routes
Understanding IS-IS Pseudonode LSP
Understanding Policy Routing
Using the Extended ping and Extended traceroute Commands
What Is Administrative Distance?
When Are ICMP Redirects Sent?
Configure

Configuration Examples and TechNotes

(All IP Routing Configuration Examples and TechNotes)

(All IP Routing Configuration Examples and TechNotes)
Configuring a Gateway of Last Resort Using IP Commands

Configuring IS-IS Authentication

Configuring IS-IS for IP on Cisco Routers

Configuring IS-IS over IPv6

Host and Subnet Quantities

IS-IS Network Types and Frame Relay Interfaces

Redistributing Routing Protocols

Understanding Policy Routing

Uses of the Overload Bit with IS-IS

Configuring IS-IS Authentication
Configuring IS-IS for IP on Cisco Routers
Configuring IS-IS over IPv6
Host and Subnet Quantities
IS-IS Network Types and Frame Relay Interfaces
Redistributing Routing Protocols
Understanding Policy Routing
Uses of the Overload Bit with IS-IS
Troubleshoot and Alerts

Troubleshooting TechNotes

(All IP Routing Troubleshooting TechNotes)

(All IP Routing Troubleshooting TechNotes)
Configuring a Gateway of Last Resort Using IP Commands

Host and Subnet Quantities

How Does Load Balancing Work?

Intermediate System-to-Intermediate System (IS-IS) TLVs

IP Addressing and Subnetting for New Users

IS-IS Network Types and Frame Relay Interfaces

IS-IS Route Leaking Overview

MTU Mismatch Problem in IS-IS

Redistributing Routing Protocols

Route Selection in Cisco Routers

Route-Maps for IP Routing Protocol Redistribution Configuration

Specifying a Next Hop IP Address for Static Routes

Understanding IS-IS Pseudonode LSP

Understanding Policy Routing

Uses of the Overload Bit with IS-IS

Using the Extended ping and Extended traceroute Commands

What Is Administrative Distance?

When Are ICMP Redirects Sent?

Host and Subnet Quantities
How Does Load Balancing Work?
Intermediate System-to-Intermediate System (IS-IS) TLVs
IP Addressing and Subnetting for New Users
IS-IS Network Types and Frame Relay Interfaces
IS-IS Route Leaking Overview
MTU Mismatch Problem in IS-IS
Redistributing Routing Protocols
Route Selection in Cisco Routers
Route-Maps for IP Routing Protocol Redistribution Configuration
Specifying a Next Hop IP Address for Static Routes
Understanding IS-IS Pseudonode LSP
Understanding Policy Routing
Uses of the Overload Bit with IS-IS
Using the Extended ping and Extended traceroute Commands
What Is Administrative Distance?
When Are ICMP Redirects Sent?
