BLT The BGP Linkstate Topographer

Consult our Blog for up to come video guides and use cases of BLT.

BLT Features

BGP Linkstate peering

BLT is able to establish and maintain one or several BGP LS sessions, towards both Juniper or Cisco routers, compliant with draft-ietf-idr-ls-distribution-10

Non intrusive IGP real time view

BLT is non intrusive by its very nature: one BGP session is enough to grab the entire IGP database content of your network, and to stay aware of any topology change or prefix addition/removal.

Storage of IGP Database

Wether you are using IS-IS, OSPFv2, or both at the same time is not a problem for BLT, because it can store all IGP databases and process updates real time

Network Controller

BLT acts as a robust and up to date network controller, with a northbound REST API, making a perfect building block for third party applications

Topology Grapher

BLT can draw a map of your IGP network, routers and links are draggable in jsPlumb legacy view. new in 0.4.0 : You may also choose to map your network on Google maps. All the IGP information is only one click away !

BLT is free without restriction


BLT is made freely available by NetFishers. No restriction in usage, just download, install and use!