I am after a bit of advice. I currently have a 1Gbps connection between two sites. The server guys are looking to locate a backup of the companies TSM Backup solution at each of the sites - this will involve a lot of replication traffic between the sites as the Backup DB's synchronise.
I want to be able to police or at least shape the traffic to/from these servers to 80% of the available capacity. Currently, the link in question has one end connected to a Cisco 6509 (Native IOS) and one end is connected to a brand new Cisco 3560 (IOS12.2(35)).
We are currently running a basic AutoQos config on the interface on the 3560 and a pretty standard QoS config on the 6509 as we have IP telephones at each site. The current setup is that the two devices are OSPF neighbors over a native VLAN, with a couple of other VLANs trunked on the same link.
I have found a way to Police traffic on the ingress interface on the 3560 - this gives me the option to police at source (I.e where the TSM servers connect into the network) but ideally, I would only like to do this over the inter-site connection.
My current thinking is that I could mark the TSM servers with a specific DSCP value at source, then configure an srr-queue shape x x x x command on the 3560 to set a specific shaped limit to the queue that I place the TSM traffic in. For example, if I mark all TSM traffic with a DSCP value of 21, the current config on my 3560 would place it in queue 3:
mls qos srr-queue output dscp-map queue 3 threshold 3 16 17 18 19 20 21 22 23
On the interface in question, I could then specify:
srr-queue bandwidth shape 10 0 80 0
Or am i missing something? (DSCP values are trusted throughout the network) Any advice would be much appreciated, this stuff really confuses me sometimes!