After @exabgp thankfully gave me an advice on my previous post, I carried out performance tests of bgpsimple and exabgp again.
Right, API might be faster than massive config loading.
Full Route Advertisement
Service providers are struggling with the growing IPv4 full route and recently some people abandon default-free zone due to TCAM space problem. But they still sometimes need full route for analysis and forensic purpose. So, I'm curious, in such a case, is there good toolbox to inject full route into their network?
I think that simple BGP daemons are good options,
- exabgp with mrtparse
can read a full-table bgpdump archive and advertise to neighbor routers. Then, how fast are they?
- MacBook Pro (Retina, Mid 2012) + VMWare
Firefly was configured as a dumb BGP neighbor rejecting any route so that it couldn't affect route injector's performance.
|bgpsimple||exabgp with config file||exabgp with API|
|Until BGP turnup||0'00"||2'58"||0'02"|
|To complete advertising since BGP turnup||2'38"||1'13"||4'13"|
|To complete advertising since "clear bgp neighbor"||2'43"||2'09"||2'31"|
Version tested: *1
It took bgpsimple 2'38" to advertise full route, while exabgp required 4'11" ~ 4'15" in total.
exabgp shows different behavior depending on its configuration. exabgp with config file in the table above means "a bunch of static routes configured in .conf converted by mrtparse", exabgp with API means "configured to run an external script for route injection". The script looks like:
import sys import time messages = [ 'announce route 126.96.36.199/24 origin IGP as-path [2497 15169 ] next-hop 192.168.0.78', ... ] while messages: message = messages.pop(0) sys.stdout.write( message + '\n') sys.stdout.flush() while True: time.sleep(1)
See exabgp's wiki for more details.
bgpsimple is handier and faster way to inject full route from bgpdump archive. It simply assumes that the route information is given as a file in
bgpdump -m format, read it with no signal handling and process routes in a simple loop with generating a minimal set of objects.