daskino12
join:2008-03-06
Santa Clara, CA
| VoIP Advise
Hello,
I posted regarding the price for a point-to-point T1 and MPLS two days ago. I would like to step back and seek for advices on the VoIP I want to setup on the current network I have.
1) Settings:
I have 3 offices in Santa Clra, Plano, and Shanghai. For Santa Clara, we have a dedicated full T1 and currently use VPN connecting to Plano. For Plano, we have a dedicated full T1 and a point to point T1 to Shanghai. For Shanghai, we have a line over there (not sure what it is). Currently, our Exchange email server is in Shanghai so for users at Santa Clara office, they are experiencing extremely slow speed on getting email.
2) What I am looking for:
-Speed up the connection for emails or other applications for the people in Santa Clara office.
-VoIP for 3 locations.
Any feedback is much apprciated.
Frank |
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cooldude9919
join:2000-05-29
Cape Girardeau, MO
clubs: | People in Santa Clara need a local exchange server. Its never going to be quick accessing email all the way over in shanghai. Install one locally and link it up to shanghai. |
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daskino12
join:2008-03-06
Santa Clara, CA
| Hello,
Will it help if we have a the Exchange Server at Plano office? Also, for some reason, the VPN connection to Plano office is extremely slow and sometimes broken. Do you know why?
What is the best way to do this if we want to go VoIP in all 3 offices?
Thanks |
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cooldude9919
join:2000-05-29
Cape Girardeau, MO
clubs:
edit:
March 6th, @07:20PM
| reply to daskino12
It would help some im sure, but it would still be slow. We also have 3 office locations and used to only have 2 exchange servers but in the end we put one in each office and have been far better off since then. Not only do you have the increased latency involved in a remote exchange server but if you are running this over a t1 circuit then it has to load the emails as they are opened plus trying to open attachments will be even slower.
In all reality downloading emails/attatchments to the servers will still go the same speed, but by the time the users see the items in their inbox it will be on the local 100mbit lan and will come up instantly.
Could be broken for any number of reasons. What kind of hardware are you using? What type of vpn tunnels? How is the saturation of this circit? How is the processor load of your routers?
We use cisco equipment and a DMVPN tunnel (dynamic multipoint). This way each location can dynamicily establish a tunnel between each other as traffic demands. It works pretty well.
I would hope you are monitoring these circuits with some sort of snmp utility. We use solarwinds and cacti and both work well, though cacti is free and solarwinds does have some nice features.
Pt to pts are nice but they are much more expensive. I havent messed with overseas connection so in this case i could be wrong , but im a believer in going internet. For the same amount if money i bet you could get 2xt1's at each location and setup a vpn system and have twice the bandwidth. |
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daskino12
join:2008-03-06
Santa Clara, CA
| Hello Cooldude9919,
Thanks for your advice. Have you guys been using VoIP or Video Conferencing? One of other factors I was thinkig to build a line in either point to point T1 or MPLS is for VoIP and Video Conference. And, I thought maybe it might be faster if the line can be used to speed up the email process.
Another question, how does it exactly work if I have a local exchange server? Won't the local exchange communicate through internet to the server in Shanghai still?
Thanks |
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cooldude9919
join:2000-05-29
Cape Girardeau, MO
clubs:
| reply to daskino12
You make a "site" within exchange administrator, then you have multiple "servers" within that site. You will have to migrate the mailboxes of the users to the new servers within their respective offices, which depending on how big their mailboxes are could take a while but in the end it will be worth it.
Yes they will still communicate with the server in shanghai but only to pass emails that are sent to users in the shanghai office. By the time the emails show up in the users inboxes at each location it will have already been downloaded to the local exchange server. The user will then be able to open the emails very quickly since it will be a local connection. |
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