De-aggregation? and bulge link problems

[MagicOneXXX]

In a kinda odd twist of fate, I have a need to de-aggregate links - in other words, subtract a device's bandwidth from another. We have a router that we are grabbing traffic from, plus a server, and I'd like to be able to map the traffic that isn't coming from that server.

Is this currently possible? Any code change I can make?

Secondly, I'm noticing that with the latest version (0.9pre2) that bulge is only working in one direction for my links. It seems to be working on the return traffic (inbound) only. Suggestions?

Thanks for the help!

[Howie]

In a kinda odd twist of fate, I have a need to de-aggregate links - in other words, subtract a device's bandwidth from another. We have a router that we are grabbing traffic from, plus a server, and I'd like to be able to map the traffic that isn't coming from that server.

Is this currently possible? Any code change I can make?

Secondly, I'm noticing that with the latest version (0.9pre2) that bulge is only working in one direction for my links. It seems to be working on the return traffic (inbound) only. Suggestions?

Thanks for the help!

Bulge does indeed use only the inbound traffic. It's because the width of the arrow is calculated for the entire link once. I might play with this after 0.9 is out, because I'd like it to be a bit nicer too. The bulge thing was really a quick hack from a while ago, so I could try animation options. I'd look at splitting the drawing code to draw each half seperately, then.

Regarding link subtraction: I have the same need actually We have a setup with a customer with two sites and a VPN between them, and we want to see how much traffic is leaving the internet-facing interfaces, but not going up the VPN, knowing the VPN traffic from a seperate rrd. So chances are that this will be done soon too. I will probably make it so that you can add '-' to the front of any TARGET spec to subtract it instead of adding it. I am trying to avoid re-implementing CDEFs in PHP, though.

[Howie]

Regarding link subtraction: I have the same need actually We have a setup with a customer with two sites and a VPN between them, and we want to see how much traffic is leaving the internet-facing interfaces, but not going up the VPN, knowing the VPN traffic from a seperate rrd. So chances are that this will be done soon too. I will probably make it so that you can add '-' to the front of any TARGET spec to subtract it instead of adding it. I am trying to avoid re-implementing CDEFs in PHP, though.

This feature made it into 0.91, just in case you haven't solved it some other way.