RT-AC5300 - Traffic monitoring via SNMP

[orion44]

I am using PRTG to monitor traffic on my RT-AC5300 running Merlin 380.64.


I am presented with following sensors and I'm not sure what they all are. I was able to piece some of together from this thread, but some still don't make sense.


(007) eth0 Traffic - WAN

(009) eth1 Traffic - Wifi 2.4G

(010) eth2 Traffic - Wifi 5G-1

(011) eth3 Traffic - Wifi 5G-2

(004) fwd0 Traffic - ??? (this appears to be traffic out from Wifi 5G-1 based on the usage)

(005) fwd1 Traffic - ???

(012) vlan1 Traffic - LAN switch

(013) vlan2 Traffic - ???

(014) br0 Traffic - Bridge (traffic doesn’t add up if it’s whole LAN)


Attached is screenshot of current usage as an example - Wifi 5G-1 is currently streaming ~3.5 MB/s which seems to be noted in fwd0 and not eth3

 

[RMerlin]

The fwd interfaces are something internal to Broadcom, and without access to their documentation, I'm not quite sure what these two contain. I believe they might be internal interfaces used between the wifi SoC and the CPU, but that's just a wild guess.

br0 is the LAN bridge, however it won't show traffic between LAN devices, as that traffic is switched, and isn't visible from the firmware's point of view.

 

[orion44]

br0 is the LAN bridge, however it won't show traffic between LAN devices, as that traffic is switched, and isn't visible from the firmware's point of view.

Understood, thanks.