I have a big problem with the bridge. My SW router should provide a single IP Interface to three vlans. Ens19.998 and Ens19.998.4090 do have the same outer vlan cos of our network scenario. Means either a single or a double tagged frame will be received from the bridge. This works as expected and the bridge is switching between these l2 networks (vlans). root at ovn-test:/home/sff00009# brctl show bridge name bridge id STP enabled interfaces br_TB001 8000.42b99b1e1cc9 no ens19.998 ens19.998.4090 ens20.300 but the br_TB001 has also an IP interface and the isc dhcrelay is installed and configured to provide a bootp relay for br_TB001 I do see that the relay receive from ens19.998 and the answer (Reply) is forward into the bridge. But the bridge obviously drops the frame. Why? bridge fdb shows the correct mac 00:19:92:c6:9d:b6 at ens19.998 only 00:19:92:c6:9d:b6 dev ens19.998 master br_TB001 42:b9:9b:1e:1c:c9 dev ens19.998 vlan 1 master br_TB001 permanent 42:b9:9b:1e:1c:c9 dev ens19.998 master br_TB001 permanent 33:33:00:00:00:01 dev br_TB001 self permanent 01:00:5<calendar:T1:01:00:5>e:00:00:01 dev br_TB001 self permanent 33:33:ff:1e:1c:c9 dev br_TB001 self permanent 01:00:5<calendar:T1:01:00:5>e:00:00:fc dev br_TB001 self permanent 33:33:00:01:00:03 dev br_TB001 self permanent 33:33:00:00:00:01 dev docker0 self permanent If I delete the second interface from the bridge? everything works as expected. Where is my fault ? Thanks a lot Mit freundlichen Gr??en / With kind regards Immo Wetzel ADTRAN GmbH Siemensallee 1 17489 Greifswald Germany Phone: +49 3834 5352 823<tel:+49%203834%205352%20823> Mobile: +49 151 147 29 225<tel:+49%20151%20147%2029%20225> Skype: immo_wetzel_adtran Immo.Wetzel at Adtran.com<mailto:Immo.Wetzel at Adtran.com> PGP-Fingerprint: 7313 7E88 4E19 AACF 45E9 E74D EFF7 0480 F4CF 6426 http://www.adtran.com<http://www.adtran.com/> Sitz der Gesellschaft: Berlin / Registered office: Berlin Registergericht: Berlin / Commercial registry: Amtsgericht Charlottenburg, HRB 135656 B Gesch?ftsf?hrung / Managing Directors: Roger Shannon, James D. Wilson, Jr., Dr. Eduard Scheiterer Sent from Mobile -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.linuxfoundation.org/pipermail/bridge/attachments/20170914/6ed40616/attachment-0001.html>