I am a-bit confused here.
I have a FW connected to L2 switch then to an ISP router. My ISP link has a 4Mb capped on the egress.
[My FW] <-1Gb link-> [p0 L2 Switch p1] <-1Gb link-> [ISP Router] <- 4Mb link ->
Doing a SNMP capture on switch2's port1 (facing ISP router), it is reflecting a 4Mb maximum bandwidth usage.
But what I don't understand is this as below ->
You might say, the ISP maximum bandwidth is capped at 4Mb, thus the bandwidth capture is correct.
But the link between the switch and the router is a 1Gb link and there isn't any policing/shaping down at the ingress port at the Router.
The FW doesn't know the Router has a 4Mb capped, it will just send all the traffic it needs over to the Router at full bandwidth of 1Gbps.
So why isn't the bandwidth capture reflect at port1 on the LAN side showing more then 4Mbps ?