Hi all,
I have a question concerning bridge settings on CRS317. To get HW offloading on all ports, all ports are in one bridge. To assign ports to different logic groups I defined VLAN groups with untagged ports (the same was earlier archived by setting up multiple bridges without VLANs).
The HP switch has no special configuration, just a “dumb” switch. When I make a connection between the HP and a port of each of the VLAN groups (like in the pic), MSTP will block one of the 2 connections although it would logically be a loop free topology.
So is there a way with MSTP to archive a setup like that? At the moment I use 2 separate bridges on the CRS317, one without HW offloading.
As HP is a dumb switch, it will forward any packet received through left port on the drawing to all other ports, including the right one on the drawing. Which will make the packet re-appear on CRS317 port 2 (but that packet left CRS317 through port 1) … if that’s not a loop, I don’t recognize one.
Ok I thought because Port 1 and Port 2 (together with further ports which arent in the drawing) of the CRS are assigned to 2 different vlan groups inside the switch, there shouldn’t be a loop. Is there another way to assign ports to logical separated switches with HW offloading on all ports? With two separate bridges theres no problem but than I have to decide which one gets HW offloading… Thats whats I’m doing at the moment.
It doesn’t matter what you do on managed switch or router, it’s the dumb switch performing a loop. Think about why you need it there, probably you’re trying to abuse it.
