Guaranteeing a portion of bandwidth

Hi experts,

Please forgive what is probably a daft question, networking is not my forté which is why I'm asking this!

Is there a way of guaranteeing a portion of bandwidth between two points without modifying firewalls/routers?

Our situation: we will be on site with 10Mbps SDSL and we have 4Mbps SDSL at our office. We want to have a 1Mbps "tunnel" between the two but we don't have control over the network infrastructure at the 10mbps site.

Is this even possible, and if so, how?

TIA
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BrainPickerAsked:
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John MeggersNetwork ArchitectCommented:
What you're talking about is one aspect of quality of service, which can be a pretty complex topic.  It's possible to create an ACL specifying source and destination of the traffic and use that to apply QoS to guarantee bandwidth for that traffic.  But unless this is supported by your ISP (or you're paying for that level of service), it's only going to be effective going out your WAN interface and from that point on all bets are off.

Take a look at http://www.cisco.com/en/US/docs/ios/qos/configuration/guide/port_level_shaping_ps11280_TSD_Products_Configuration_Guide_Chapter.html.  There's an example of minimum bandwidth allocation that might help give you an idea of how it's configured.  The nuts and bolts of it may be different depending on what version of IOS you're using.
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BrainPickerAuthor Commented:
Thanks - I've read about QoS but as pointed out in my initial post, making such modifications to network infrastructure isn't possible. It's for a few hours for a one off event. I don't think it's possible but I thought this would be the place to ask!
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Marius GunnerudSenior Systems EngineerCommented:
Without making changes to network hardware makes what you want impossible.
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BrainPickerAuthor Commented:
Thanks - that's what I thought but wanted confirmation.
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