Inter-vlan routing

Forum|Forum|4 years ago
December 21, 2021
2 replies
2035 views

Hi, after some guidance for best practice with inter vlan routing. Currently we have most sites where vlans reside on router but due to streaming video footage from one vlan to another we are considering moving the vlans to the switch, servers containing the video feed are up linked at 2GB but I notice the routers are only 1GB (40F) connections. Understand we would also need layer 3 switches. Any advice appreciated.

Markus_M

Staff & Editor

Hey markd-bit,

The interface speeds between two devices must match. If the servers are on 2GB, that indicates the switch they are connected to, is doing a link aggregation of two ports and creates a virtual interface of 2GB capacity, so does your server.

If your FortiGate is connected to that switch it should be no issue as FortiGate<>(Forti?)Switch link is 1GB. You can aggregate these ports as well if you need bandwidth, but do not need to.

Example: I have a FortiGate with a FortiSwitch attached to it with a 4x1GB aggregate. On the switch there is a FortiAP connected with 2x1GB aggregate and another FortiSwitch with 1x1GB. The L2 connectivity is done between the interfaces of the hardware, the routing (L3) doesn't care about the interface speeds.

Best regards,

Markus