Upcoming Labs

The first few labs are already online; the list of ideas is much longer. Here they are:

Configure IS-IS Features

Passive IS-IS Interfaces

• Explain the need for passive interfaces
• Configure passive IS-IS interfaces
• If available, turn off the advertisement of inter-router prefixes

Influence the Designated IS Election

• Explain the need for DIS priority
• Configure DIS priority on a router

Protect IS-IS Adjacencies with MD5 Authentication

• Configure IS-IS area- and interface passwords

Route Redistribution into IS-IS

• Configure static route and connected interface redistribution into IS-IS

Fast IS-IS Failure Detection and Convergence

• Configure IS-IS timers
• Use BFD

Advanced Labs

Multi-Level IS-IS Networks

• Explain intra-area and inter-area routing
• Configure a network with multiple areas and L1/L2 routers

Graceful Shutdown with IS-IS Overload Bit

• Configure IS-IS overload bit or maximum metric to drain traffic from a transit router

Build an SR-MPLS Network with IS-IS

• Build a BGP-free MPLS core using SR-MPLS with IS-IS

Configure IS-IS Fast Reroute Using TI-LFA

• In a triangle network, configure the longer path as a backup path

Using IS-IS with SRv6

• Build a BGP-free IPv6 core using SRv6 for end-to-end transport

Troubleshooting

Troubleshoot IS-IS Adjacencies

This lab will include the most common mistakes that prevent an IS-IS adjacency from forming, including:

• MTU mismatch
• L1/L2 mismatch
• Area mismatch on L1 adjacency
• 3-way handshake on point-to-point links