[qasdfdsaq]

Originally Posted by BeerCanSandwich

SRA is used and is what makes the on the fly resyncs so fast meaning the router can hang on. You can always tell a SRA event from a full reboot because the stats aren't reset and more often than not the PPPoE session is maintained, as a result the IPProfile doesn't update.

Ermm I don't think you understand how SRA works.

SRA does not do any resyncs, ever. You can never tell an SRA event from anything. It's seamless. Of course the PPPoE is always maintained, it's seamless and has no effect on anything. Nothing other than the modem itself can tell anything ever happened.

No major ISP in the UK uses SRA.

---------- Post added at 05:42 ---------- Previous post was at 05:41 ----------

Originally Posted by Chrysalis

So I think your post could be misleading, it changes ip every time the pppoe session drops.

Ermm, isn't that exactly what I said? (P.S. It does not change every time the PPPoE session drops. You can, in certain rare circumstances reconnect the PPPoE session and get the same IP)

---------- Post added at 05:55 ---------- Previous post was at 05:42 ----------

Originally Posted by Chrysalis

BT retail are extorniate on static ip charges

Eh? £5 a month for 5 (well actually 8) IPs is extortionate? Or do you mean the business service is extortionate? (Because to be fair, £48 a month for a completely unlimited, 80Mbps service is actually ridiculously cheap compared to the rest of business the market - WT charge £82 for a not-completely-unlimited 40Mbps and IDNet charge £120 for an unlimited 80Mbps.)

Originally Posted by Chrysalis

I think they are been agressive to make the residential service hard to use as a substitute

Or just that they have 20 DHCP pools to serve 11 million customers... TBF most residential customers probably wouldn't even care if they got given RFC1918 addresses.

Originally Posted by Chrysalis

Interesting on the timeout workaround tho, so that may be a way round it if my line isnt stable

Mine's set to 60 seconds. That tends to be enough to survive both fast resyncs (~10-15 seconds), full resyncs (~20-30 seconds) and a modem reboot (~40-50 seconds).

As I've unfortunately learnt, it's not quite enough to survive me moving the modem to the next room *and* rebooting it in the process... That ruined my last 40-day uptime on my TBB monitor

As to why openreach dont use it I dont know, it is far superior to DLM, DLM been some kind of scripted hack, whilst SRA part of the xDSL specsheet and changes the line settings without a connection drop.

SRA has its disadvantages though. It copes well with slow to medium fluctuations in signal quality, it can't cope with fast and severe swings. DLM can, but only by permanently capping your line to below the worst case scenario. But again, stability over speed is BT's mantra...

In comparison VM has to drop an entire segment down to 64QAM to cope with signal fluctuations... :-P