Netgear Broadcast VLAN Bandwidth Issues

[softwarenate]

Hello

I'm having trouble with a Netgear L2 managed switch bandwidth. It is used for several port based broadcast VLANs for some data streams.

I set up the first 10 ports as vlan100 on 192.168.5.1/24.

Using iperf, I can verify that the unicast speed is 10Gb/s over the VLAN. However, when broadcasting our stream, I am only getting about 2Gb/s with wireshark.

Using wireshark on the sender and receiver I can see that packets are being dropped by the switch. And If we connect the broadcast stream directly to the receiver, it receives all the data while still sending to the broadcast address

We verified the MTU and max frame size of the ports are the same. We are using jumbo frames of 9000 MTU.

I know this is kinda vague but any suggestions would be greatly appreciated. I dont know much about networking, its probably something simple I've overlooked in configuration.

Thanks.

 

[softwarenate]

Its my first time setting up a managed switch. There's a function called storm control that limits broadcast traffic and its enabled by default. All I had to do was disable it.

Netgear storm control

 

[imagoon]

While I am glad you found your issue, next time you may want to provide more information. I mean you didn't even provide a model number so this find doesn't even benefit anyone else because they won't know it applies to whatever model you are using. Netgear isn't often known for it high performance fabrics. I would also verify that you actually need or are using the 9000MTU setting correctly otherwise there is a change that you will choke other devices down the line with packet fragmentation which will destroy performance use a lot of CPU on the the devices needing to break things up. Example being if this is a stream going to the net, 9000MTU frames will wreck WAN routers and performance.