Thanks Charles, Alexander. I disabled the rp_filter. it works.
By the way, I have made a opensource Virtual Network Topology builder (Bird running in dockers, and we can make a any kind of topology). Please have a look on this quick tutorial, and share your feedback. https://www.youtube.com/watch?v=PEdc6uwNkr0&t=25s https://github.com/knetsolutions/knet/ Thanks suresh On Tue, Apr 24, 2018 at 9:35 PM, Alexander Zubkov <gr...@qrator.net> wrote: > Hi. > > Try to disable rp_filter first. > > On Tue, Apr 24, 2018 at 5:16 PM, knet solutions <knetsolutio...@gmail.com> > wrote: > >> >> All, >> >> I am facing a strange issue (all routers are linux with bird runnning). >> My topology(RING Topology) is as below, >> >> >> R1 ------------R2------------R3---------R4 >> >> BGP is running on all nodes. >> >> R1 to R3 route is going via R1--R2--R3 and the return path is in also in >> same path (R3--R2----R1), then thing works fine >> >> But suppose, >> >> R1 to R3 path is R1---R2---R3 and return path is R3----R4---R1. then >> traffic is not passing. >> >> Any configurations i should do in linux ? >> >> -- >> >> *Regards, * >> >> *Suresh* >> *Knet solutions.* >> >> https://github.com/knetsolutions/KNet >> http://knet-topology-builder.readthedocs.io/ >> http://knetsolutions.in/ >> >> > -- *Regards, * *Knet solutions.* https://github.com/knetsolutions/KNet http://knet-topology-builder.readthedocs.io/ http://knetsolutions.in/
