Upcoming Labs

A large number of IS-IS labs are already online, but we keep getting interesting ideas (example). Here are some of them:

Advanced Labs

The Impact of IS-IS Area Partitioning

• Explain suboptimal routing within a poorly-designed area (L1 routes are preferred over L2 routes)
• Explore what happens when an area partitions

Securing Multi-Level Networks at the Area Level

• Use level-specific passwords

Explore LSP Database Behavior

• What happens when an LSP is changed?
• How is an LSP removed from a database?
• What happens on network partitioning?

Using IS-IS with SRv6

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

Two-Way Redistribution

• Redistribute routes between OSPF and IS-IS at multiple points
• Use route filters to prevent routing loops

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