This is the documentation for the 20.02 version. Looking for the documentation of the latest version? Have a look here.

Working with Large BGP TablesΒΆ

When working with a large set of routes, roughly exceeding 30,000 route table entries, TNSR may require additional memory to be allocated for the VPP dataplane Forwarding Information Bases (FIB). Smaller routing tables do not require special configuration.

This memory allocation can be performed in configuration mode using one of the following commands:

For IPv4 (Memory):

tnsr# configure
tnsr(config)# dataplane ip heap-size <size>

For IPv6 (Memory):

tnsr# configure
tnsr(config)# dataplane ip6 heap-size <size>

The format of the size is <number>[KMG], for example: 512M or 1G for 512 Megabytes or 1 Gigabyte, respectively.

Additionally, the statistics segment heap size may also need to be increased (Statistics Segment):

tnsr# configure
tnsr(config)# dataplane statseg heap-size <size>


The default size for dataplane statseg heap-size is 96MB, which is sufficient for approximately one million routes when worker threads are not in use.

See also

For more details about selecting an appropriate heap-size value, especially when worker threads are enabled, see Statistics Segment.

The VPP dataplane service requires a restart to enable these configuration changes. Restart VPP from the TNSR configuration mode CLI using the following command:

tnsr# configure
tnsr(config)# service dataplane restart