This article gives an explanation of the Bridge Direction Alert and how to resolve the following warning which appears even though the user is sure that the LAN-WAN cables within the bridge are connected properly.
Bridge may be connected incorrectly
The Exinda uses the Management Interface (usually Eth1) as the subnet to compare internal and external packets. So, based upon the fact that the mgmt interface is supposed to be connected to the internal network, the Exinda behaves in a designed (default) manner.
Supposing your Exinda Management interface is set to 172.16.0.100/16:
- It counts how many packets coming from the internal network (LAN Interface) match the Exinda Management subnet (172.16.0.0/16). It assigns that value to a variable A.
- It counts how many packets coming from the external network (WAN Interface) match the Exinda Management subnet (172.16.0.0/16). It assigns that value to a variable B.
- It compares both values. If B is greater than A, the alarm is triggered.
So if your Exinda mgmt interface is connected to a subnet that is mainly located after the WAN side of the Exinda, this alarm is bound to be triggered. So the best option here is to disable it.
- Go to Monitor > Real Time.
- Check that the Internal column contains IP that belongs to the LAN while the External column contains external IPs properly or if the cables are actually connected backward but that is the intention.
- Disable the Bridge Direction alert in Configuration > System > Setup > Alerts.
Note: if you have VLAN assigned to Eth1, consider moving it out of LAN switch bridges to resolve the alert.