- Written by Rabi Narayan
- Posted on January 19, 2026
- Updated on January 20, 2026
- 728 Views
Link State IGPs such as IS-IS depend upon having a consistent LSDB across all the Intermediate Systems (ISs or nodes) in the network in order to provide correct forwarding of data packets. When topology change occurs due to various network events, new/updated LSPs are propagated network-wide. The speed of propagation is key for a faster network convergence.