Frame relay

[Silver-0-surfer]

Hi

I recently did my n+ (passed ) and there was a few questions on frame relay.

I thought it was a special wan technology available over seas but I see that telkom does provide it. Can anyone maybe explain what it actually is, like for example vs ADSL?

 

[Sting]

Here's some info...

http://en.wikipedia.org/wiki/Frame_Relay

http://www.telkom.co.za/attheoffice/services/internationalservices/btvpn/index.html

 

[warwickw]

In simple terms think of it as diginet/martis but without the requirement to have it only between 2 fixed points only. 1 Frame Relay ciricuit can map or talk to multiple frame relay lines.

An example: Head Office has a frame relay node, and open a branch in PE, PE branch gets Frame Relay then head office creates a PVC (permanant virtual circuit) between the 2, later on they open another branch in Durban and then map a PVC between HO and Durban. So HO has 1 frame relay line and PE has and Durban has.

 

[MidnightWizard]

Non PVC -- SVC

In simple terms think of it as diginet/martis but without the requirement to have it only between 2 fixed points only. 1 Frame Relay ciricuit can map or talk to multiple frame relay lines.

(Telkom ) VPN's on MATIS

What about a Switched Virtual Circuit

Here is a VERY good reference from CISCO -- "Internetworking Technology Handbook"

Better than text books --and -- FREE

 

[MidnightWizard]

COST

Here's some info...

http://en.wikipedia.org/wiki/Frame_Relay

http://www.telkom.co.za/attheoffice/services/internationalservices/btvpn/index.html

Perhaps you can tell us why it is so expensive

Should be as cheap as ADSL ( actually SDSL )

 

[Sting]

Perhaps you can tell us why it is so expensive

Should be as cheap as ADSL ( actually SDSL )

Cannot help, but probably due to maintenance cost and lack of skills, as all the old-timers who knew this have left!!!

 

[ponder]

FR is a packet switching technology with the emphasis on switching. This differs from your normal point to point based services like Martis or Diginet from Telkom.

Frame Relay has it's roots in the much older X.25 packet switching technology.

 

[MidnightWizard]

FR -- MATIS

FR is a packet switching technology with the emphasis on switching.
This differs from your normal point to point based services like Martis or Diginet from Telkom.
Frame Relay has it's roots in the much older X.25 packet switching technology.

You still need a point to point Diginet / MATIS from your premises to the nearest Telkom exchange -- not so ( That is the way Telkom bill you for it )

What do Telkom use to run the PVC on -- ATM

 

[ponder]

You still need a point to point Diginet / MATIS from your premises to the nearest Telkom exchange -- not so ( That is the way Telkom bill you for it )

What do Telkom use to run the PVC on -- ATM

Yes, you will require that to the closest FR node.
They will bill you for the two martis/diginet links as well as for using the FR cloud. It usually works out cheaper using FR though due to distances of the leased circuits and the bandwidth charges inside the cloud. If you use a point-multipoint setup things are even cheaper but it's a kuk setup imho, just thinking about routing behaviour etc.

I honestly cannot remember what they run inside the FR cloud, it's most likely ATM. They might have even migrated to L2TP over their IPNet backbone, it's been some time so I'm not sure unless I call a friend.