I've gone back and forth with support trying to resolve my problems with packet loss on bonded Fusion and wanted to post my experience to see if any users might have suggestions on what else to try.
I'm over 14k feet from the CO and had a stable 1536/384 ADSL1 interleaved line with AT&T for the last 2 years. Last week I ported my line and added a 2nd bonded line. The Sonic.net performance on my ported line using ADSL1 interleaved is around 1200/384 while the new line is around 1300/288. The ADSL2+ interleaved performance is 100-200 better on downstream and the same on upstream. I'm using a ZyXEL P-663HN-51 and plugged directly into the NID (i.e. no internal wiring).
If I only have one line or the other plugged in but not both, my connection is stable (i.e. no packet loss on ping to http://www.sonic.net) as long as I have the upstream speed capped at the value mentioned above. Once I plug both DSL lines in, though, I have packet loss of ~10% if the second line is the primary connection and packet loss of 25+% if the first line is the primary connection.
Multiple line tests were performed by Sonic.net confirming that the DSL line itself was well within spec. An AT&T technician checked the line on Saturday at the NID and also confirmed that the line was clean.
Sonic.net support:
- suggested sending a new modem. I received a loaner ZyXEL P-663HN-51 modem today but the behavior is identical to my original modem.
- suggested that the problem was the ZyXEL RJ-11 Y-cable. I rewired to combine the two lines from the NID into a 2-line RJ-11 plug, but the behavior was identical to the ZyXEL Y-cable.
- suggested trying to switch from Interleaved to Fast. Other than a lower sync rate and a higher error count, the behavior was identical to Interleaved.
- suggested that the lines have matched speeds. This seemed to work when both lines were capped at 512/288, but why would I pay for two lines configured to be slower than a single line? Setting both lines at 1188/288, which held sync, showed the same level of packet loss as when the lines did not have the same speeds.
- intended to send a Comtrend modem but inadvertently sent the ZyXEL. A loaner Comtrend is supposed to arrive on Friday.
- said that a port change at the CO was considered a drastic last resort.
Any other suggestions?
I'm over 14k feet from the CO and had a stable 1536/384 ADSL1 interleaved line with AT&T for the last 2 years. Last week I ported my line and added a 2nd bonded line. The Sonic.net performance on my ported line using ADSL1 interleaved is around 1200/384 while the new line is around 1300/288. The ADSL2+ interleaved performance is 100-200 better on downstream and the same on upstream. I'm using a ZyXEL P-663HN-51 and plugged directly into the NID (i.e. no internal wiring).
If I only have one line or the other plugged in but not both, my connection is stable (i.e. no packet loss on ping to http://www.sonic.net) as long as I have the upstream speed capped at the value mentioned above. Once I plug both DSL lines in, though, I have packet loss of ~10% if the second line is the primary connection and packet loss of 25+% if the first line is the primary connection.
Multiple line tests were performed by Sonic.net confirming that the DSL line itself was well within spec. An AT&T technician checked the line on Saturday at the NID and also confirmed that the line was clean.
Sonic.net support:
- suggested sending a new modem. I received a loaner ZyXEL P-663HN-51 modem today but the behavior is identical to my original modem.
- suggested that the problem was the ZyXEL RJ-11 Y-cable. I rewired to combine the two lines from the NID into a 2-line RJ-11 plug, but the behavior was identical to the ZyXEL Y-cable.
- suggested trying to switch from Interleaved to Fast. Other than a lower sync rate and a higher error count, the behavior was identical to Interleaved.
- suggested that the lines have matched speeds. This seemed to work when both lines were capped at 512/288, but why would I pay for two lines configured to be slower than a single line? Setting both lines at 1188/288, which held sync, showed the same level of packet loss as when the lines did not have the same speeds.
- intended to send a Comtrend modem but inadvertently sent the ZyXEL. A loaner Comtrend is supposed to arrive on Friday.
- said that a port change at the CO was considered a drastic last resort.
Any other suggestions?