Thanks Wei That was the article I was following for troubleshooting - proved to be very useful.
In our case even though the multicast config was present and correct on the switches it has just stopped working after the power outage. Re-applying the multicast switch config immediately restored functionality to the RVR's Gary Dixon Quadris Cloud Manager +44 (0) 161 537 4980 +44 (0) 7989 717661 gary.di...@quadris.co.uk www.quadris.com Innovation House, 12-13 Bredbury Business Park Bredbury Park Way, Bredbury, Stockport, SK6 2SN -----Original Message----- From: Wei ZHOU <ustcweiz...@gmail.com> Sent: Saturday, April 20, 2024 3:28 PM To: users@cloudstack.apache.org Subject: Re: RVR's in master/master state Hi Gary, Thanks for the sharing I recall a similar issue caused by a multicast configuration (not the same): https://github.com/apache/cloudstack/issues/7838#issuecomment-1722697352 anyone facing the similar issue could check the multicast configurations. Kind regards, Wei On Fri, Apr 19, 2024 at 6:20 PM Gary Dixon <gary.di...@quadris.co.uk.invalid> wrote: > Hi Daan > > Sorry - I forgot to post back what the issue turned out to be. > > We had a power outage in our building where our Dev environment is racked. > After doing some tcp dumps on some vxlan interfaces I was seeing lots > of bad checksums. > Our Network engineer swore that the switches we're all OK but after > re-applying the multicast config on the switches - all of the RVR's > came back into a stable Master/Backup state across all VPC's. > Hope this helps others if they are seeing strange behaviour with VPC > RVR's when using VXLAN guest isolation > > BR > > Gary > > > > Gary Dixon > Quadris Cloud Manager > +44 (0) 161 537 4980 <+44%20(0)%20161%20537%204980> > +44 (0) 7989 717661 <+44%20(0)%207989%20717661> > gary.di...@quadris.co.uk > http://www.q/ > uadris.com%2F&data=05%7C02%7CGary.Dixon%40quadris.co.uk%7Ce9fb36590460 > 4570a19608dc61461dbf%7Cf1d6abf3d3b44894ae16db0fb93a96a2%7C0%7C0%7C6384 > 92200978503803%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2l > uMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=MOrw1j6mujkBduk > TaLlsZ%2BhV0ql9qcziL%2FcPnNNIbmk%3D&reserved=0 > Innovation House, 12‑13 Bredbury Business Park Bredbury Park Way, > Bredbury, Stockport, SK6 2SN -----Original Message----- > From: Daan Hoogland <daan.hoogl...@gmail.com> > Sent: Friday, April 19, 2024 3:08 PM > To: users@cloudstack.apache.org > Subject: Re: RVR's in master/master state > > sorry no one could help you Gary, > Have you gotten any further on this issue? > > On Fri, Apr 5, 2024 at 4:59 PM Gary Dixon > <gary.di...@quadris.co.uk.invalid > > > wrote: > > > HI all > > > > > > > > ACS 4.15.2 > > > > Ubuntu 20.04 > > > > KVM > > > > Adv Zone no sec groups > > > > > > > > We recently had to move all of our dev ACS environment virtual > > management and mysql servers to a new isolated subnet for security > reasons. > > > > > > > > Since then all of the VPC RVR’s are in master/master mode. > > > > If I restart a VPC with cleanup the RVR’s come back into a > > master/backup state for a few minutes but then go into master/master > > state rendering the VPC useless. > > > > > > > > In the cloud.log on one of the RVR’s it is full of these errors: > > > > “2024-04-05 14:51:43,843 ERROR Not able to setup source-nat for a > > regular router yet” > > > > > > > > Can anyone point me in the right direction to resolve this issue ? > > > > Are there other logs I could look at or services on the RVR’s to check ? > > > > > > > > BR > > > > > > > > Gary > > > > > > Gary Dixon > > Quadris Cloud Manager > > +44 (0) 161 537 4980 <+44%20(0)%20161%20537%204980> > > +44 (0) 7989 717661 <+44%20(0)%207989%20717661> > > gary.di...@quadris.co.uk > > http://www/ > > .q%2F&data=05%7C02%7CGary.Dixon%40quadris.co.uk%7Ce9fb365904604570a1 > > 9608dc61461dbf%7Cf1d6abf3d3b44894ae16db0fb93a96a2%7C0%7C0%7C63849220 > > 0978509895%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luM > > zIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=yig9%2F5H%2F2T7 > > Q07%2BlcLOCgRfwH8NCvrmBZw0L5Z%2BYTz8%3D&reserved=0 > > uadris.com%2F&data=05%7C02%7CGary.Dixon%40quadris.co.uk%7C6d453f6408 > > 0c > > 449f243d08dc607a6e5c%7Cf1d6abf3d3b44894ae16db0fb93a96a2%7C0%7C0%7C63 > > 84 > > 91326163464980%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV > > 2l > > uMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=tKsAdO2jZBj5q > > eL > > CsCSOX0zLNsvyrXSeY7PegUCOBhE%3D&reserved=0 > > Innovation House, 12‑13 Bredbury Business Park Bredbury Park Way, > > Bredbury, Stockport, SK6 2SN > > > > > -- > Daan >
