F5F Stay Refreshed Power Users Networks Mixing QoS mode on multiple switches

Mixing QoS mode on multiple switches

Mixing QoS mode on multiple switches

M
MavrosGR
Senior Member
Find
579
05-16-2025, 09:15 PM
#1
I have some queries regarding setting up QoS on my two managed switches. Which method imposes more network load or causes more buffer and packet congestion? If one switch uses a single QoS approach and the other a different one, could this lead to problems or extra overhead? My setup includes an 8-port switch acting as a central hub linked to the main AP/router (with just four ports), and a second 5-port switch handling a physical room and connecting to the hub. My priorities are clear: traffic from at least one secondary switch must be given higher priority, no matter what it does. The NAS on the first switch should rank lower than other connections—like Wi-Fi devices going to/from the router. I want to avoid bottlenecks near the edge router (which caps at 400/30Mbps). If I apply port-based QoS only to the secondary switch where the laptop is top priority, it should ensure its traffic always gets ahead of everything else. Using 802.p/DSCP on the central switch would let me prioritize all traffic by type—streaming for example should be favored over file transfers, whether coming from the laptop or elsewhere. Are these configurations likely to cause unexpected issues or unnecessary overhead?
Reply
Reply
M
MavrosGR
05-16-2025, 09:15 PM #1

I have some queries regarding setting up QoS on my two managed switches. Which method imposes more network load or causes more buffer and packet congestion? If one switch uses a single QoS approach and the other a different one, could this lead to problems or extra overhead? My setup includes an 8-port switch acting as a central hub linked to the main AP/router (with just four ports), and a second 5-port switch handling a physical room and connecting to the hub. My priorities are clear: traffic from at least one secondary switch must be given higher priority, no matter what it does. The NAS on the first switch should rank lower than other connections—like Wi-Fi devices going to/from the router. I want to avoid bottlenecks near the edge router (which caps at 400/30Mbps). If I apply port-based QoS only to the secondary switch where the laptop is top priority, it should ensure its traffic always gets ahead of everything else. Using 802.p/DSCP on the central switch would let me prioritize all traffic by type—streaming for example should be favored over file transfers, whether coming from the laptop or elsewhere. Are these configurations likely to cause unexpected issues or unnecessary overhead?

Reply
Reply