SCN Doubt 1

[RafaelGrande]

Hello guys!

I´m working on a project that will install many IPO´s on separated sites, forming an SCN. My idea is to setup a star topology, with 2 IPO´s on the center (with fallback option for Voicemail). All other IPO´s would have 2 H323 trunk, one for each central IPO´s. Despite the SCN trunks, many of the sites have direct data links.

My question is, if someone call from a border IPO to other border IPO, considering that the two sites have data links between them, will the call itself be routed through the central IPO´s? Or the central IPO´s will serve only to "inform" the two sites how to find each other?

If my explanation is too much confused i can make some draws!

 

[hairlessupportmonkey]

In a star config then you will be routing twice as much traffic. You will be better off with a mesh, then with "allow direct media path" the RTP will become peer to peer and reduce the traffic load on the network.

ACSS - SME
General Geek

 

[RafaelGrande]

I see, but when you say a mesh you are talking about the scn trunks layout or only on the data links?

This project im working with have about 20 schools, with one IPO planned for each. All schools hava a data link to a central datacenter in a way that all networks can "see" each other.

When u say a meshed network u mean i should create an H323 link betwen each site? Considering 20 schools, each IPO would have 19 H323 trunks.

 

[CarGoSki]

Yes that is what he means.

Mesh Layout
The use of 'mesh' layouts connections is only supported for a Small Community Network of IP Office 5.0 or higher systems. A mesh layout is one where there is more than one possible H323 SCN Line route between any two systems. Mesh, star and serial layouts can be combined.

 

[RafaelGrande]

Another question came into my mind. If the IPO have 2 possible routes to get to another IPO, how will it choose the path?

 

[tlpeter]

That is up to how the routing is made.
You will need to have IP routes in your router to the other locations.
So your routing must be a mesh too otherwise it won't work.


BAZINGA!

I'm not insane, my mother had me tested!

 

[RafaelGrande]

I´ve just made a simple paintbrush drawing to explain my doubts:

https://www.dropbox.com/s/rzhppxulczwndhm/SCNProject.jpg

The letf one is the data network already installed. All frame relay links are routed inside the datacenter in a way that all sites can see each other.

The right one is what i was planning. And my doubt is, for example, if an user from SiteC makes a call to SiteF, the IPO´s on both sites will send packets directly to each other (as the data network can provide), or they will both send packets to IPO´s on SiteA and SiteB?

If SiteA and SiteB will route the packets, how will the border IPO´s chose to witch of them to send?

 

[DrDrayAvaya]

the H323 trunks / line groups have specific IP addresses assigned to them (all 19) so it's up the routing to get them to where they need to be (in IP Routes) so you shouldn't have two different ways to get to another site ever.. you'll get big RED CROSSES in error list from multiple IP Routes being the same.
it used to be the only way in the old days, cos there would be one system with 19 H323 trunks out to 19 different satellite IPO IP addresses and all the satellites would have just 1 H323 trunk pointing to the mothership.
Your voice networking channels/licenses won't need to be massive at central sites then either..

do the mesh. get cisco propellor head to say "sure, that looks good, lets do it"

Cheers,

Chris

 

[mattKnight]

Wow - 20 schools and 1 data center

A full mesh network for 21 sites = an awful lot of tunnels!

(I reckon 220 in total)


Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[RafaelGrande]

Hey guys, sorry for the slow follow ups, but i´ve been doing some field work the past days (i also work with UPS systems). So basically what will determine how call will be routed is the IP Routes list on the IPO.

In that case can i point all IPO´s to the Datacenter router, that is already routing all networks? Something to be clarified is that the datacenter will have no IPO´s installed.

And i still have the doubt about how the call will flow. In my example, with a start topology, if a border IPO calls another border IPO, will the packets be sent to the central IPO´s, or they will be capable to send packet directly to each other?

 

[teletechman]

Found the issue it was the wrong app it must have been to CM onex. Now that I have the correct app I entered the server address as http:// and want to remove that haw can I do this I dont see a way inside the app.
Mike

 

[CarGoSki]

Que? Usted está hablando en el subproceso incorrecto. Maybe you meant to post in the thread you started.

 

[tlpeter]

In that case can i point all IPO´s to the Datacenter router, that is already routing all networks? Something to be clarified is that the datacenter will have no IPO´s installed.

Yes you can do that but then you will have a single point of failure!

BAZINGA!

I'm not insane, my mother had me tested!

 

[RafaelGrande]

Yes you can do that but then you will have a single point of failure!

I see, but its something the client is already used to, as the datacenter router is already the "mothership" for all sites.

And how about this? Have anyone seen how would it work?

i still have the doubt about how the call will flow. In my example, with a start topology, if a border IPO calls another border IPO, will the packets be sent to the central IPO´s, or they will be capable to send packet directly to each other?

 

[tlpeter]

When the core router does the routing then you can create IP trunks to all other sites.
You need one iproute like 0.0.0.0 0.0.0.0 gateway

Or you could connect 10 to one IPO and the other 10 to a different IPO and connect those two to each other.


BAZINGA!

I'm not insane, my mother had me tested!

 

[RafaelGrande]

So it would be possible, for example, to create the star topology for the SCN trunks, as i draw before, but do the mesh on the data links through the IP Routes?

 

[tlpeter]

You can do a mesh as the core router takes care of the routing.
But with so much sites i would probably make a drawing and a good plan.
A SCN network can do max 5 hops so keep that in mind.


BAZINGA!

I'm not insane, my mother had me tested!