How to limit bandwidth valn based with QOS or Rate limit or Traffic shaping in 3560.

[noor19921371K]

Hi folks,

I am newbie to Cisco R&S, I have just done CCNA and CCNP, got my first job as Netowrk Associates.

In our office with 200 employees, we have a internet leased line connection of 16 Mbps which is connected directly from ISP modem to Endian Community Firewall, a Cisco 3560 switch is connected to the firewall as core switch and 6 more non managed is concocted to our core switch,

2 non-managed switch for each floor, we have created 3 VLANs on core switch VLAN 10, 20 and 30.

each 2 non-managed switch is connected to above 3 VLANs.

I want to divide the 16 mbps internet to all 3 vlans equally.

Please help me with it.

[Joseph W. Doherty]

Cisco LAN switches often are weaker than Cisco routers in their QoS feature support, and managing ingress bandwidth, "fairly", even with a Cisco router, is generally impractical.

For egress, however, you can:

Run 3560 port to the FW at 100 Mbps
Set the port limit to 16% (NB: feature doesn't precisely meter, but it will "shape")
Enable QoS (NB: Be prepared for increased drops if using default buffer settings)
Map each VLAN to one of the four hardware egress queues
Allocate each of those three (selected) hardware queues the same bandwidth allocation

PS:

https://www.cisco.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/91862-cat3750-qos-config.html