[plug] OT: Pool of IPs for testing load-balanced connections

Simon Newton lists at nomis52.net
Fri Sep 4 00:27:36 WST 2009

On Wed, Sep 2, 2009 at 11:01 PM, Adrian Woodley<Adrian at diskworld.com.au> wrote:
> There's not much difference between me throwing the odd icmp at a Telstra
> Boarder (for example) and the same Telstra Boarding having to pass the icmp
> across their network to my (currently non-existent) pool of IPs.

Actually there is. Any decent networking gear is going to do ip
routing by building forwarding tables in hardware or be using MPLS
anyway. A icmp packet addressed to the router itself is going to cause
an interrupt for main processor and be queued to be dealt with later
or even dropped if the device is under load. You can see this in
traceroutes where the response time and/or packet loss from
intermediate nodes is higher than the response time/ loss of the

Simon N

> There's also several orders of magnitude fewer devices in this scenario than
> in the ones listed previously.
> Adrian
> Daniel Pittman wrote:
>> Yes: don't, no matter what people say, use any IP other than an IP your
>> company owns and controls.
>> Don't abuse other people by treating them as a resource to be used without
>> specifically making an arrangement with them directly.
>> So, in other words: use your own services.
>> Regards,
>>        Daniel
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