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OK cool, thanks for clarifying.

Thanks for your advice Shack, I'll have a read through those articles. The reason I was focusing on database performance was that I thought the AV API hooked into the database? So it seemed logical to see how quickly messages were processed into the database or how big the queue got for example.

Hi, I'm currently testing Anti-virus products. I want to be able to get some measure of the impact Exchange aware products have on the performance of an Exchange server. I have Exchange setup in a virtual environment for testing. I've run the Exchange Loadgen utility but I am not sure that the...

Thanks for your response!

We have multiple VLANs aggregated on a layer 3 switch that forwards traffic destined to the internet to a router. We want traffic for from one VLAN to go to the internet by a different route. Is it possible to configure a different route to the internet for traffic from one VLAN? If so how?

Sorry for not responding, I've been on holiday! I've realised I've confused myself here and the subnet in post #4 is wrong. But it still doesn't work with the correct subnet. The topology is pretty straightforward, there are two subnets contained within two VLAN's behind the router. VLAN1 =...

Originally it was traffic from VLAN1 as I was trying to give priority to this. Then I switched to just trying to limit traffic from VLAN2 using policing, hence the change if subnet.

Hi, Thanks for your continued help. Changing the access-lists round and applying them to the dialer interface make no difference, sh policy-map int still shows no matching packets except for in class-default like above.

Thanks for that. After reading the policing section, it seemed I could keep things simple and just limit traffic from (and perhaps to) VLAN2 to a specific bandwidth rather than trying to assign priorities. I thought it might be worth just trying to get this working first. So I now have the...

Could you supply any URL's for guides to do this or a config example? As I've said I'm a complete neophyte to QoS so whilst in principle I understand what you mean I have no idea how to actually implement it. Many thanks.

Hi, I've had time to test this now and the results have been a little underwhelming in that, not much, if anything seems to happen. I've tried both methods and all I really seem able to do is to actually reduce the performance for VLAN1 when using the LLQ method.... I appreciate these...

Glad to be of help :)

I've tried inputting the PCR value you suggested and on my router I can't input a value that hight. The syntax for the command is shown as follows: vbr-nrt ? <32-288> Peak Cell Rate(PCR) in Kbps Any suggestions?

The main prerequisite is that your public DNS domain must be hosted on a different DNS infrastructure to the one that your internal clients use - e.g. clients out on the public internet use my ISP's DNS servers to resolve hostnames within my public domain whereas Internal clients use internal...

I didn't think you could go in and out on the same interface like that. In any case, if you want your internal users to be able to access those services they should be directed to the internal IP's that those services run on - typically you would do this with a split DNS. For example, I have a...

Great, thanks for clarifying that and for the earlier responses, you've been a great help.

Thanks for the response. Quote: "Essentially you are reserving 50% B/W to VLAN2 during congestion. When not congested, either VLAN can utilise as much B/W as it available - those restrictions only kick in when your line is flooded with traffic." Sorry to labour the point but I find this...

OK, so if I want to limit traffic from VLAN2 to a macimum of half the 1024/256 connection I would do something like this? access-list 115 permit ip 172.31.17.0 0.0.0.255 any access-list 116 permit ip any 172.31.17.0 0.0.0.255 class-map from_VLAN2 match access-group 115 class-map to_VLAN2...

Thanks, I'll give those articles a read and let you know how I get on.

Hi, I have an 877W with two VLANs. Staff use VLAN1, non-staff users use VLAN2. I want traffic from VLAN1 to have priority for the internet connection (ADSL). I either want to restrict the traffic from VLAN2 to a maximum throughput level thus guaranteeing a certain amount of bandwidth of the...