I would like to see if I can simulate a WAN link between a test LAN and our corporate LAN.
We are moving equipment to a datacentre and have been provisioned with a 20MB connection from our building to the datacentre.
I would like to set up a test switch in the same building as the equipment we want to move, and see if we can throttle the bandwidth between the two networks, to try and see what kind of slowdown we will get when moving from a LAN to WAN-based system.
We have Cisco Catalyst 3750G switches in both our LAN and WAN environments, so would hope to simulate the connection using these if possible.
On a 3750G, force the interface to 100 Mbps, and then try "srr-queue bandwidth limit 15" on the interface. The limiter idles the port's bandwidth in actual incremements of about 6%, but 15 might provide about 21 Mbps. I.e. you may need to adjust the % up or down to come as close to your desired value as the hardware will support.)
BTW: there are PC free software tools that will emulate both a WAN's bandwidth, latency, and drops. You might want to consider using one of those.
After preliminary tests, joesph's suggestion seems to have returned satisfactory results. I am aware we will need to take into account latency between switches and routers when actually running live testing, but this is more than enough for a general starting point.
What has now arisen is the request for adding a 4510 into the equation at our building, connecting to a 3750 in the datacentre.
Could someone please let me know the best way to add a throttle to a port on a 4510, or to throttle inbound and outbound traffic on a port for a 3750G?
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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