Marcus Sorensen created CLOUDSTACK-4967:
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Summary: vxlan doesn't scale
Key: CLOUDSTACK-4967
URL: https://issues.apache.org/jira/browse/CLOUDSTACK-4967
Project: CloudStack
Issue Type: Bug
Security Level: Public (Anyone can view this level - this is the default.)
Components: KVM
Affects Versions: 4.3.0
Reporter: Marcus Sorensen
Assignee: Toshiaki Hatano
Fix For: 4.3.0
com.cloud.exception.InternalErrorException: Failed to create vnet 987529:
inet 172.17.10.10/24 brd 172.17.10.255 scope global cloudbr0Error: an inet
prefix is expected rather than "239.15.3857.137".Error
It looks like the vxlan implementation doesn't scale correctly with vxlan's
capabilities. The VNI is supposed to be up to 24 bits (16777216), it should be
possible to use high VNI numbers. The script 'modifyvxlan.sh' seems to do this:
local mcastGrp="239.$(( $vxlanId >> 16 % 256 )).$(( $vxlanId >> 8 % 256 )).$((
$vxlanId % 256 ))"
$vlanid >> 8 %256 (and similar) may need to be ($vxlanId >> 8) % 256
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