On 2012-01-19T17:16:09-0500, Matty Sarro <msarro@xxxxxxxxx> wrote: > We have georedundant servers in production, and due to the delay > between them, we are encountering some errors with a database. Now, we > are unable to replicate in our QA lab because everything is located in > the same building. To resolve this, we want to use tc. Basically what > I need to do is use tc to add a 15 ms delay on egress for anything > within the destination subnet of the "georedundant" site. Likewise, we > want to add an ingress delay for anything from the georedundant site. > > Now, I was planning to use HTB for this, however when I follow the > manpage for htb it says that I *must* specify the rate for each of the > child classes. The thing is, when I try to specify a rate of 1000mbps > (the line speed) I get an error "HTB: quantum of class 10001 is big." Sounds like you should use netem for this. Set up a Linux box as your Ethernet bridge, and follow this documentation: http://www.linuxfoundation.org/collaborate/workgroups/networking/netem It's pretty simple to set up and works well. -- Kenyon Ralph
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