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Do I need Best Effort COSP from data vendor?

Posted on 2011-09-07
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Last Modified: 2012-05-12
I am about to order a private 1.5 MBps connection between our SF and LA offices from TelePacific. They have a service they call OneNet over a private MPLS Ethernet circuit. TelePacific is offering to provide me best effort CoSP. We will have ShoreTel VOIP and Citrix traffic moving over this line. The VOIP traffic is more important to the business than the Citrix traffic, but I don't expect either to go near the bandwidth capacity. It's only four users and up to eight phone calls. There will also be some VPN or other traffic going over this line.

I will have SonicWall appliances on both ends. They are charging $50 a month in SF and LA ($1,200 a year) for this "quality of service." It's a private line, so do I need to pay for this CoSP service or could I easily configure the SonicWalls to do the QoS between themselves over this line?

And does anybody know what COSP is versus QoS?

- Elan
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Question by:sweetseater
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amatson78 earned 1000 total points
ID: 36500212
While it is a "private" line it still goes over their networks. Many providers strip DSCP tags which make QoS past your edge device useless. VoIP traffic is actually small packets but a number of them. You can configure QoS for your internal network to allow priority over other traffic such as HTTP, etc. This may help. I would check with the provider if they preserve DSCP tags past the Demark.
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by:sweetseater
ID: 36500310
Thanks. I asked them if they preserve DSCP tags. My understanding of it being a "private" line is that we are guaranteed 1.5 Mbps and no other data is being transferred on the "circuit." It's like a VPN without the overhead. I guess it does traverse over cables and switches of other companies on their network, but my understanding is that it does not "compete."
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by:sweetseater
ID: 36503425
I got an answer that they preserve DSCP tags end-to-end on their private MPLS network.
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by:amatson78
amatson78 earned 1000 total points
ID: 36504247
Then if you implement QoS you can prioritize that traffic across the network and save yoyrself some headaches later :-) glad to hear they do preserve.  I would jot worry about paying them for tthe service :-)
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