xuanyuanaosheng commented on issue #7838:
URL: https://github.com/apache/cloudstack/issues/7838#issuecomment-1702209516
> Linux native VXLAN uses multicast by default. You need to have an IP
address on each of your host VXLAN subinterfaces that is within the same
network.
@kiwiflyer Yes, I have config the IP address on host VXLAN subinterfaces
using cloudbr1:
- The hosts network config:
```
|---------------- cloudbr0: 10.26.128.22 ( VLAN 2128)
kvm001 ------
|---------------- cloudbr1: 10.71.231.42 ( VLAN 2230)
|---------------- cloudbr0: 10.26.128.23 ( VLAN 2128)
kvm002 ------
|---------------- cloudbr1: 10.71.231.43 ( VLAN 2230)
|---------------- cloudbr0: 10.26.128.25 ( VLAN 2128)
kvm003 ------
|---------------- cloudbr1: 10.71.231.41 ( VLAN 2230)
```
Using kvm003 as an example, the host network config,:
```
# cat ifcfg-eno49
TYPE=Ethernet
BOOTPROTO=none
NAME=eno49
UUID=0650d63c-0244-4852-b0aa-ca5d8a64d8cb
DEVICE=eno49
ONBOOT=yes
# cat ifcfg-eno49.2128
NAME=eno49.2128
DEVICE=eno49.2128
ONBOOT=yes
HOTPLUG=no
BOOTPROTO=none
VLAN=yes
BRIDGE=cloudbr0
# cat ifcfg-cloudbr0
NAME=cloudbr0
DEVICE=cloudbr0
TYPE=Bridge
BOOTPROTO=none
ONBOOT=yes
IPADDR=10.26.128.25
GATEWAY=10.26.128.254
NETMASK=255.255.255.0
HOTPLUG=no
DELAY=5
STP=no
-------------------------------------------------------------------------------------
# cat ifcfg-eno50
TYPE=Ethernet
BOOTPROTO=none
NAME=eno50
UUID=46da1a8f-615e-4649-be64-fc8e1c7dd264
DEVICE=eno50
ONBOOT=yes
# cat ifcfg-eno50.2230
NAME=eno50.2230
DEVICE=eno50.2230
ONBOOT=yes
HOTPLUG=no
BOOTPROTO=none
VLAN=yes
BRIDGE=cloudbr1
# cat ifcfg-cloudbr1
NAME=cloudbr1
DEVICE=cloudbr1
TYPE=BRIDGE
ONBOOT=yes
BOOTPROTO=static
IPADDR=10.71.231.41
NETMASK=255.255.255.0
IPV6INIT=no
IPV6_AUTOCONF=no
HOTPLUG=no
DELAY=5
STP=no
```
The host can ping each other usinig cloudbr1. Is this network config is not
correct?
> Also, by default, Linux only configures enough IGMP memberships for 20
VXLAN networks.
>
> Run this - echo 100 >/proc/sys/net/ipv4/igmp_max_memberships
>
> You can make that change permanent by adding this to your sysctl.conf -
>
> net.ipv4.igmp_max_memberships = 100
@kiwiflyer This have been done.
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