BayNetworks Access Node, Nortel Passport FR switch and troubles
Vsevolod V. Denisenko
I'm using Bay-Networks Access Nodes, AE#1001008 with software version 13.20.
We cooperated with yet another povider to devide one G.703 stream to two FR
stream through Nortel Passport FR switch.
So the following scheme describing our channels:
One branch Other branch
FR CIR = 1.5 Mbit/s, Access node FR CIR = 1.5 Mbit/s, Acces
| |
|E1, V.35 |E1, V.35
________^________ _________^_______
| | | |
|Nortel Networks| 2Mbit/s channels, G.703 |Nortel Networks|
| Passport of |---------------------------------------| Passport of |
| channel | | channel |
| provider | | provider |
|_______________| |_______________|
CIR = 512 Kbit/s leaves at channel provider Passport switch for internal use.
As you see G.703 channel divison is simmetric for both ends of the channel.
So at every ends of G.703 channel we have 1.5 Mbit/s CIR through FR.
In accordance to our bandwidth allocation we should achive transfer speed
between our branches at both ends of this channel ~ 190Kbyte/s. But border
transfer perfomance couldn't be grate than 90 Kbyte/s.Meanwhile at AN's
I see the following statistics:
From one side's AN DLCI 440
[ANimal]$sho fr cong
Line.LLIndex.DLCI Enable State Method Timer Counter Rx FECN Rx BECN
------------------- ------- ---------- -------- ----- ------- -------- --------
201102.0.0 Inherit Forwarding Inherit 1.0 20 0 0
201102.0.440 Inherit Forwarding Inherit 1.0 20 106919 5761
201102.0.441 Inherit Forwarding Inherit 1.0 20 51 2
201102.0.460 Inherit Forwarding Inherit 1.0 20 4 40
201102.0.570 Inherit Forwarding Inherit 1.0 20 287 6
5 entries found
[ANimal]$
From other side's AN DLCI 460
[Myshanya]$sho fr cong
Line.LLIndex.DLCI Enable State Method Timer Counter Rx FECN Rx BECN
------------------- ------- ---------- -------- ----- ------- -------- --------
201101.0.0 Inherit Forwarding Inherit 1.0 20 0 0
201102.0.0 Inherit Forwarding Inherit 1.0 20 0 0
201102.0.460 Inherit Forwarding Inherit 1.0 20 18302 153298
3 entries found
[Myshanya]$
My channel provider said me that the picture from his side is identical to my,
but he received the same BECN quantity (that's right, I'm shure).
I have switched off congestion control at my AN's , but the picture
still unchanged. My channel provider also admit that the same time
his 512Kbit channel is not overloaded.
What is wrong? Who may help me to solve my troubles?