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Juniper Junos

General Information​

The Forward Collector is responsible for the collection of both RIB and FIB information from the device. In devices with very large routing or forwarding tables, multiple configurable methods of collection are needed to balance between collection speed and information accuracy.

A set of enhancements in the collector logic were completed to improve the collection time for large routing and forwarding tables on Junos-based devices. These enhancements include:

  • FIB table collection on Junos is no longer CPU throttled and chunked. Instead, FIB table collection limits can be specified. During the snapshot collection, Forward Collector determines the number of entries in the individual routing tables of devices. If it exceeds the specified value, only RIB is collected on that device. Forward Collector is pre-configured with best-practice parameters and can significantly decrease the collection time duration.
  • If you believe some of the platform-specific values need to be changed, please contact Forward support.
  • From Collection -> Collector settings, edit the desired per-platform value. Only RIB will be collected if the number of entries in routing table of the same platform exceeds the configured value. Limit FIB Collection
  • Support for BMP-based BGP collection. The BGP Monitoring Protocol allows for route table collection through a protocol allowing for quicker BGP route information capture. More information on the Forward implementation of BMP can be found on the BMP documentation page.
  • Regardless whether BMP is enabled, collection of IGP routes is done through the CLI. With BMP enabled JUNOS devices, BGP routes are no longer collected via CLI.
  • Forward Collector allows for partial BGP routes collection in those cases, where BMP collection is not possible, yet the speed of collection must be increased
  • In the Collection -> Collector settings, the Max number of routes value specifies the cutoff limit. All BGP routes will be collected from JUNOS devices, unless a limit is specified and exceeded. Past the limit, only routes listed in Required subnets are collected. Regardless, the default route is always collected.
  • On JUNOS, CLI route collection configuration only applies to routes installed by BGP. IGP and static routes are not affected.
    Limit FIB Collection
  • In cases when both RIB and FIB information was collected, the Forward Platform will prefer FIB to RIB.
  • BGP route selection logic has now been implemented consistent with Juniper's route selection documentation .