For general information about sending syslogs, see Sending Additional Information using Syslog. Do not send syslog traffic from your devices to your primary VIP.
When installing TOS on cloud VMs such as Azure (where the install parameter --primary-vip is set to external), syslog data must be sent from your devices to the IP of an external load balancer on your VM. Do not use Syslog VIP Commands below.
When installing TOS on-premise (where the parameter --primary-vip is set to an IP address on your network), syslog data must be sent to a dedicated syslog virtual IP. You will need to set up at least one syslog VIP address as described below in Syslog VIP Commands. Do not send syslog traffic to your primary VIP.
If you have over 1,000 devices, this could create a bottleneck and degrade performance and we recommend defining another syslog for every additional 1,000 devices you monitor. However, there is no benefit in defining more syslog-VIPs than the number of worker nodes in the cluster. This applies separately to the central cluster and remote collector clusters.
All syslog VIPs must be on the same subnet as the primary VIP.