Hi, I faced the similar problem before and if I remember correctly, OVS drops the LLDP packets as the bridge mode in factions related to the STP (Spanning Tree Protocol).
Sorry I forgot the detail for it, but the follow post seems to describe some points. https://www.dorm.org/blog/finally-a-workaround-for-lldp-with-open-vswitch/ 2019年6月13日(木) 16:16 Wajahat Hussain Mir <mir.wajahat.huss...@gmail.com>: > Dear Yusuke, > > The topology which i have created is comprised of only *OVSSwitch* class. > Now the *legacy nodes* which i have created have a *failmode attribute* > value of *standalone* and they are not connected to the controller. As > per the *tcpdump* used I noted that when the packet reaches from > OpenFlow switch to legacy switch of the same class its not able to forward > it. > > An example has been depicted in the attached file below. > > > > > > > > With Regards > Mir Wajahat Hussain > > > On Thu, Jun 13, 2019 at 11:11 AM Yusuke Iwase <iwase.yusu...@gmail.com> > wrote: > >> Hi, >> >> What does "legacy node" exactly mean? Cisco switch or Linux machine? >> >> As far as I know, some switches including Linux bridge do not transplant >> LLDP packets for a loop prevention mechanism. Please confirm which switch >> or node drops the packets first. >> >> Thanks, >> Iwase >> >> >> 2019年6月13日(木) 1:58 Wajahat Hussain Mir <mir.wajahat.huss...@gmail.com>: >> >>> Hi, >>> >>> I have a query pertaining to *LLDP* (*ether-type = 0x88cc)*. When an >>> *OpenFlow* switch forwards *LLDP* packet to a *legacy node* why the >>> legacy node is unable to forward it. Is it because of non understanding of >>> the protocol or is it on account of *TTL *field in the LLDP frame. >>> >>> Any help will be highly appreciated. >>> >>> >>> >>> >>> >>> >>> >>> With Regards >>> Mir Wajahat Hussain >>> _______________________________________________ >>> Ryu-devel mailing list >>> Ryu-devel@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/ryu-devel >>> >>
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