Dear IWAMOTO, I have changed the value of LLDP_SEND_PERIOD_PER_PORT from 0.9 to 10 and changed the value of LLDP_SEND_GUARD from 0.5 to 1. Then I captured the LLDP Packet with tcpdump in OF Switch and I have seen that 2063 packets are received within 8 minutes which can lead to the LLDP broadcast storm.
On Thu, Sep 13, 2018 at 11:42 AM Soe Ye Htet <soeyehtet1...@gmail.com> wrote: > Dear IWAMOTO, > > Thanks you very much for your reply. I will share the experience after > varying this value. There is another question from me too. Can we apply > LLDP packet for software defiend wireless network. That part is really > confused to me as I see that LLDP packet is mainly used in wired network > and I am also trying to detect the specific link status in between the > wireless nodes. > > Best Regards, > Soe Ye Htet > > On Thu, Sep 13, 2018 at 11:25 AM IWAMOTO Toshihiro <iwam...@valinux.co.jp> > wrote: > >> On Wed, 12 Sep 2018 17:02:51 +0900, >> Soe Ye Htet wrote: >> > I have read about that LLDP Packet is mainly used in a wired network in >> > order to detect the link failure. However, in my case, I am also trying >> to >> > detect the wireless link failure with LLDP Packet. I generate LLDP >> Packet >> > by command line ryu-manager --observe-links. I have observed that a lot >> of >> > LLDP packet is generated. Can we set the time for generating LLDP packet >> > for eg every 0.3 sec one LLDP packet is generated. In my configuration, >> > there are 3 wireless nodes and one RYU Controller and only one wireless >> > dongle is used in each wireless nodes and in a controller which means I >> > have applied an in-band control. My current network topology is >> small-scale >> > wireless mesh network with fully interconnected. I have trying to detect >> > the detection of wireless link failure. >> >> LLDP packets are generated in >> ryu.topology.switches.Switches.lldp_loop. >> >> As you can see, LLDP packets are rate limited by the hardcoded >> constants LLDP_SEND_PERIOD_PER_PORT and LLDP_SEND_GUARD. >> >> Does changing these values help? >> >> -- >> IWAMOTO Toshihiro >> >
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