|
Home > Archive > alt.certification.cisco > April 2004 > Frame Relay in Europe
You are viewing an archived Text-only version of the thread.
To view this thread in it's original format and/or if you want to reply to
this thread please [click here]
| Author |
Frame Relay in Europe
|
|
|
| Hi, could anyone please tell me why Frame Relay technology has been a
success in Europe compared with alternative technology?
Thanks
| |
|
| Hi
The success can be be put down to various factors, but it might be true to
say it has been more popular in America.
Over a single carrier public network i.e. not the Internet the benefits
include. The cost of equipment and subscription, A guaranteed minimum
subscribed bandwidth (type of QOS), The ability to use more bandwidth than
you are paying for if network capacity is available, ease of set-up on
customers kit, the ability to use Private IP address space so no address
purchase necessary in the private network and security.
It behaves like a private network using PVC's (Permanent Virtual Circuits)
between sites. No traffic from one PVC can leak into another in the carriers
network offering security but each of these PVC's must be purchased so if
full connectivity is required either a full mesh of pvc's needs to be
purchased or traffic would need to pass in and out of a hub site. Because
the network infrastructure is shared though it equates to cheaper bandwidth
than dedicated point-point links which it emulates. Also please note access
speed to the network is usually between 64k and 2048k
Other Technologies are at Layer 2 - (all can can carry multiple Layer 3
protocols IP,IPX etc. without IP tunnelling)
X25 - predecesor to Frame Relay, Slower speeds supported and needing error
correction so more processor intensive.
Point-Point - expensive and only supports 2 sites with each circuit, but
dedicated bandwidth.
ATM - Expensive equipment with high header overhead usually used for high
speed sites 34M and above. but uses PVC's as per frame relay with the
customer able to purchase different QOS types, UBR, VBR-nrt, VBR-rt, CBR.
SMDS - Don't know much about this technology apart from any site to any site
at layer2 without purchasing individual PVC's
Layer 3 - (only IP considered)
IP - In it's standard form is insecure without extra
investment/configuration PIX firewalls for example, as a multitude of
organisations/individuals are useing a shared medium. QOS over the Internet
is virtually non existant but in a single carrier public network is now
maturing.
IPSec - A method where the real IP packets are encripted and tunnelled using
IP to a destination. This answered the security aspect but still did not
answer the QOS aspect. Popular over the Internet for long distance non
critical traffic that needs security. This is sometimes refered to an a VPN
(Virtual Private Network)
MPLS - (Multi Protocol Label Switching). This is a new offering that tries
to give the advantages of Frame Relay in an IP world.
Customer uses pure IP with any to any connectivity but only to members of a
closed user group also refered to as a VPN. i.e. the customers other sites.
Can use Private IP addresses within this closed user group.
QOS had matured on introduction of this technology.
Customer equipment costs simular if not the same as for frame relay.
Customer config is simple.
I hope this helps.
Can you advise me of the reason for your question though for curiosity sake.
Regards
Toby
"Dave" <glapots@jhotmail.com> wrote in message
news:hNeic.10$d63.4@newsfe2-gui.server.ntli.net...
> Hi, could anyone please tell me why Frame Relay technology has been a
> success in Europe compared with alternative technology?
>
> Thanks
>
>
| |
|
| Thanks again for the reply. Basically my reason for asking the question is
for research purposes. I'm trying to build up different opinions about frame
relayt technology - particulary in Europe - and then draw my own
conclusions. it's as part as my networking studies in college.
Toby your knowledge has ben extremely helpful - thanks!
"Toby" <notavailable@ntlworls.com> wrote in message
news:MECic.474$Q04.455@newsfe3-win.server.ntli.net...
> Hi
>
> The success can be be put down to various factors, but it might be true to
> say it has been more popular in America.
>
> Over a single carrier public network i.e. not the Internet the benefits
> include. The cost of equipment and subscription, A guaranteed minimum
> subscribed bandwidth (type of QOS), The ability to use more bandwidth than
> you are paying for if network capacity is available, ease of set-up on
> customers kit, the ability to use Private IP address space so no address
> purchase necessary in the private network and security.
>
> It behaves like a private network using PVC's (Permanent Virtual Circuits)
> between sites. No traffic from one PVC can leak into another in the
carriers
> network offering security but each of these PVC's must be purchased so if
> full connectivity is required either a full mesh of pvc's needs to be
> purchased or traffic would need to pass in and out of a hub site. Because
> the network infrastructure is shared though it equates to cheaper
bandwidth
> than dedicated point-point links which it emulates. Also please note
access
> speed to the network is usually between 64k and 2048k
>
> Other Technologies are at Layer 2 - (all can can carry multiple Layer 3
> protocols IP,IPX etc. without IP tunnelling)
>
> X25 - predecesor to Frame Relay, Slower speeds supported and needing error
> correction so more processor intensive.
>
> Point-Point - expensive and only supports 2 sites with each circuit, but
> dedicated bandwidth.
>
> ATM - Expensive equipment with high header overhead usually used for high
> speed sites 34M and above. but uses PVC's as per frame relay with the
> customer able to purchase different QOS types, UBR, VBR-nrt, VBR-rt, CBR.
>
> SMDS - Don't know much about this technology apart from any site to any
site
> at layer2 without purchasing individual PVC's
>
>
> Layer 3 - (only IP considered)
>
> IP - In it's standard form is insecure without extra
> investment/configuration PIX firewalls for example, as a multitude of
> organisations/individuals are useing a shared medium. QOS over the
Internet
> is virtually non existant but in a single carrier public network is now
> maturing.
>
> IPSec - A method where the real IP packets are encripted and tunnelled
using
> IP to a destination. This answered the security aspect but still did not
> answer the QOS aspect. Popular over the Internet for long distance non
> critical traffic that needs security. This is sometimes refered to an a
VPN
> (Virtual Private Network)
>
> MPLS - (Multi Protocol Label Switching). This is a new offering that tries
> to give the advantages of Frame Relay in an IP world.
> Customer uses pure IP with any to any connectivity but only to members of
a
> closed user group also refered to as a VPN. i.e. the customers other
sites.
> Can use Private IP addresses within this closed user group.
> QOS had matured on introduction of this technology.
> Customer equipment costs simular if not the same as for frame relay.
> Customer config is simple.
>
> I hope this helps.
>
> Can you advise me of the reason for your question though for curiosity
sake.
>
> Regards
>
> Toby
>
>
>
> "Dave" <glapots@jhotmail.com> wrote in message
> news:hNeic.10$d63.4@newsfe2-gui.server.ntli.net...
>
>
|
|
|
|
|