GitHub user weizhouapache added a comment to the discussion: Virtual machine on different hosts but in same isolated network not able to communicate (can't ping each other).
> Hi All, > > We managed to resolve our issue. > > Upon further checking, we found out that the VXLAN in Host 6 was down, while > other VXLANs were up and running fine. > > This would explain why: > - Only VMs from certain networks were affected (cause cloudstack creates 1 > VXLAN for each Network Tier) > - LIve Migration between Node 6 and other hosts works fine (cause Live > Migration uses the Management Physical Network instead of Guest Network) > > @dineshjchoudhary @akshaybachhav , maybe you guys should try checking this > out too if the root cause is the same. When we manually bring back the VXLAN, > it works. > > What we dont know now is, why the VXLAN suddenly went down. Ill probably > raise another ticket for this. Do you use multicast group? If yes, can you check if the setting impacts you? https://docs.cloudstack.apache.org/projects/archived-cloudstack-getting-started/en/latest/networking/vxlan.html#important-note-on-max-number-of-multicast-groups-and-thus-vxlan-intefaces GitHub link: https://github.com/apache/cloudstack/discussions/9154#discussioncomment-9614828 ---- This is an automatically sent email for users@cloudstack.apache.org. To unsubscribe, please send an email to: users-unsubscr...@cloudstack.apache.org
