![]() ![]() ![]() |
|
Quidam:
Ender, you do understand that there are potentially many modems attached to 1 cmts?!?
The issue is contention ratio, and unless someone from Telstra wants to say otherwise, Glassman admitted that by international standards we have loaded the nodes way over what is normally regarded as acceptable levels.
1 fast ethernet "is a bottleneck" if several people are online sucking from the same teet at the same time. Replace the cmts with a gigabit connection and the bottleneck is opened up significantly. Split the node into 2 or 4 and you also ease the bottleneck.
doppleganger:Quidam:
Ender, you do understand that there are potentially many modems attached to 1 cmts?!?
The issue is contention ratio, and unless someone from Telstra wants to say otherwise, Glassman admitted that by international standards we have loaded the nodes way over what is normally regarded as acceptable levels.
1 fast ethernet "is a bottleneck" if several people are online sucking from the same teet at the same time. Replace the cmts with a gigabit connection and the bottleneck is opened up significantly. Split the node into 2 or 4 and you also ease the bottleneck.
Quidam, perhaps you should try and explain to everyone how it's possible to flatline a 100mbps ethernet with 42mbps (The theoretical, no you will never actually get this in user throughput, limit of a docsis 2.0 downstream) of traffic?
cyril7: Good stuff, you say Wellington, does that include Kapiti.
Cyril
Swede:cyril7: Good stuff, you say Wellington, does that include Kapiti.
Cyril
Does anyone know?
Sorry but I have been following this with interest as I am struggling to stay in a
game of WoW or EQ2 for more then 10 - 15 mins at peak times
up on the Kapiti coast and according to the people
at TLC HD that I have been talking to "There are no issues on your node".
Go easy on a first timer... :-)
Swede:cyril7: Good stuff, you say Wellington, does that include Kapiti.
Cyril
Does anyone know?
Quidam:
ps. Here's an interesting link from cisco about recommended max users per cmts:
http://www.cisco.com/en/US/tech/tk86/tk804/technologies_tech_note09186a00800a9702.shtml
doppleganger:Quidam:
ps. Here's an interesting link from cisco about recommended max users per cmts:
http://www.cisco.com/en/US/tech/tk86/tk804/technologies_tech_note09186a00800a9702.shtml
As a matter if interest, what leads you to believe TCL's network falls outside of these engineering guidelines?
Quidam: As a matter of interest, what leads you to believe that I am lead to believe TCL's network falls outside of these engineering guidelines?
Obviously Cyril has already cleared up my confusion on this issue, and the issue of oversubscription on the cmts remains valid.
Quidam:doppleganger:
As a matter if interest, what leads you to believe TCL's network falls outside of these engineering guidelines?
As a matter of interest, what leads you to believe that I am lead to believe TCL's network falls outside of these engineering guidelines?
Quidam:
The issue is contention ratio, and unless someone from Telstra wants to
say otherwise, Glassman admitted that by international standards we
have loaded the nodes way over what is normally regarded as acceptable
levels.
doppleganger:Quidam:doppleganger:
As a matter if interest, what leads you to believe TCL's network falls outside of these engineering guidelines?
As a matter of interest, what leads you to believe that I am lead to believe TCL's network falls outside of these engineering guidelines?
:D Nice.
Previous comments you've made such as the following does:Quidam:
The issue is contention ratio, and unless someone from Telstra wants to
say otherwise, Glassman admitted that by international standards we
have loaded the nodes way over what is normally regarded as acceptable
levels.
Also, I wouldn't read too much into what Glassman said. That post contains only some very general info about the cable network.
Ender:Quidam: As a matter of interest, what leads you to believe that I am lead to believe TCL's network falls outside of these engineering guidelines?
I think Dopp might be reacting to your previous comment :Obviously Cyril has already cleared up my confusion on this issue, and the issue of oversubscription on the cmts remains valid.
Quidam:
Secondly, have you not read the post by glassman?!? It's not like I came up with the idea myself. In fact it's very hard for me to believe Dopp was even being serious (or sincere) with his question.
If in fact Dopp knows there are no overloading issues on the nodes, then why doesn't he just come out and say that? (effectively calling Glassman either a liar or misinformed)
Quidam:
Lastly, I am representing myself as a consumer looking to understand why my connection has been so unreliable for the last few months. Clearly I'm not the only one experiencing issues. Exactly who is Dopp?!? Assuming he works for Telstra (even if by contract) it would probably do a lot to help perspective and context if he stated what his actual role is.
In fact it seems there are number of people appearing on this forum with perhaps just one or two posts, without indicating their involvement or interest.
doppleganger: I'm walking a fairly fine line between what I'm allowed to tell people about how cable works, so I apologise if things seem a little obtuse.
I think alot of the confusion about the whole contention ratios comes from Glassmans comments about the TCL node size in Wellington and that there's one cmts per node... Which would be an issue if TCL had 100% penetration... Just because a node has 2000 homes in it (and I'm neither confirming nor denying that, call it a number for a theoretical discussion :P ) it doesn't mean all of those houses have cable.
Does that help at all?
Yes, I work for TelstraClear. I'm one of the IP Geeks (not an official title :) ), we work on all sorts of kit amongst which is the cable network.
Although I can't be 100% sure why your specific connection may be having issues there are some well known problems TCL are working to resolve, the ARP issue being the biggest one. That particular issue, and the reason for this thread, is very close to being resolved.
In fact the Christchurch mass migration was completed Monday morning and Arp levels there are around 2-3pps at the moment, which is allllll good. And more importantly easily verifiable from anyone in chch with a cable connection and the know how to use wireshark.
We're currently analyzing data from the Chch migration and hope to roll out the solution to Wlg in the next couple weeks.
|
![]() ![]() ![]() |