The recommended solution is to set unique IP address for each VAP on the circuit, using the increment-per-vap option in the circuit configuration. This is the preferred setting for any circuit used for management traffic.
This issue can be resolved by adjusting source ports available on each of the VAPs for locally originated connections. To make this change, run the sysctl
command on each VAP to assign a unique range in the variable net.ipv4.ip_local_port_range.
For example:# sysctl -w net.ipv4.ip_local_port_range="10240 26624"
To make this change permanent, edit the file /etc/sysctrl.conf
on each VAP.
Here is an example assigning 16384 non-overlapping source ports on three VAPs. # vsx_1:
net.ipv4.ip_local_port_range = 10240 26624
net.ipv4.ip_local_port_range = 26625 43009
net.ipv4.ip_local_port_range = 43010 59394