mityagz / pfr

Performance routing

PFR

PFR is performance routing. This type of routing is based on round trip time and packet loss instead of routing protocols metrics. This code sends icmp probes to list of destinations through several SPs at the same time and measure rtt and packet loss over these SPs for each destination of the list. Then the code injects specific(/32) bgp routes with appropriate next-hop into own AS (don't advertise any external AS), it directs traffic throught external peer with min rtt && packet loss. Gobgp(exec gobgp or grpc are used) is used for routes injection.

This code gets list of destination prefixes(top n) from ipfixcol2pfr to use shm ipc.
We should use some external mechanism to direct probes toward appropriate SP. SP id is contained into icmp payload, we can match the id(see ping_data.h) to use packet filter and send to corresponding vrf/vlan and further to appropriate SP.

The code isn't production ready yet!

TODO:

• Handle IPv6 routes.