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JPedroT

join:2005-02-18
kudos:2
reply to bds85466

Re: ZyXEL PK5001Z Modem dropping exactly every 15 minutes

The log does not say anything more about lower level of things.
But what you see is that the device requests a new IP after 15 minutes as you say.

Now the question is why does this happen, there can be a lot of reasons.

But one thing I have seen before, is that the intial dhcp request is by broadcast and then when it wants to renew it does it with a another broadcast. The DHCP expects it to be a unicast, so its a mismatch. This is just a guess, but without some more details its hard to do any proper guess work

Can you get a packet trace that we can look at?
--
"Perl is executable line noise, Python is executable pseudo-code."

bds85466

join:2012-11-17
Waconia, MN
Yeah, sure thing if you can walk me through the steps. I'm not sure what that is .

Another thing I noticed is that the IPv4 timer counts up to 15 minutes and then resets, triggering the above drop condition.


Brano
I hate Vogons
Premium,MVM
join:2002-06-25
Burlington, ON
kudos:14
What IPv4 timer? Can you provide screenshot?

bds85466

join:2012-11-17
Waconia, MN
I can't at the moment as I'm away from home. Can do after I get home though.

It's the uptime timer shown with all of the IPv4 stats.

If you are familiar with the firmware menus, I believe it is under the Modem Status heading, and then the Internet Status side menu; though that's completely by memory.

It basically refreshes every 10 seconds or so, and it counts up (but never makes it past 15 minutes without resetting back down to zero). Right at that time is when the connection drops.

bds85466

join:2012-11-17
Waconia, MN
reply to Brano
sorry, i did a qreply instead....

bds85466

join:2012-11-17
Waconia, MN
Another thing, when a diagnostics test is run, the "encapsulation test" fails every time.

bds85466

join:2012-11-17
Waconia, MN
reply to JPedroT
said by JPedroT:

Can you get a packet trace that we can look at?

Anyone know how to go about doing this? Sorry, new to this...


Brano
I hate Vogons
Premium,MVM
join:2002-06-25
Burlington, ON
kudos:14
Reviews:
·TekSavvy DSL
·Bell Fibe
Do you have to connection 'Nailed-up"? If not, make it so.

Do you have latest firmware on the unit? According to this page »qwest.centurylink.com/internethe ··· are.html the latest is "QZP002-3.4.012.0"

Are you using the PK5001Z as modem only? Do you have another router in your setup?
Or is the PK5001Z being used as modem/router?

As for the packet capture, there are basically several ways to do it
1) If the device itself supports a packet capture the use that.
2) If you have a managed switch or true HUB, place it between the modem and router and use the sniffing port capability to capture the packets (assuming you have separate router and modem and access to managed switch or true HUB).

bds85466

join:2012-11-17
Waconia, MN
Brano,

Thanks for the response. I don't know if I have the connection "nailed up". I'm guessing there's some way to check in the firmware.

When I tried to upgrade my firmware via the CL site yesterday it said I had the most up to date release -- though I will double check on the exact version.

No additional router connected at this time, just the modem. I'll look around in the firmware and see (for both the packet capture and the nail up).

bds85466

join:2012-11-17
Waconia, MN
reply to Brano
Click for full size
prior to drop
Click for full size
at drop
said by Brano:

What IPv4 timer? Can you provide screenshot?



Brano
I hate Vogons
Premium,MVM
join:2002-06-25
Burlington, ON
kudos:14
Is this a PPPoE connection?

bds85466

join:2012-11-17
Waconia, MN
reply to bds85466
Click for full size
tracer route to yahoo.com
DSL Status

Connection
Status
DSL Downstream:
9.434 Mbps
DSL Upstream:
0.894 Mbps
DSL Link Statistics

Link Statistic
Status
Broadband Mode Setting:
MULTIMODE
Broadband Mode Detected:
ADSL_2plus
DSL Link Uptime:
13H:38M:34S
Retrains:
11
Retrains in Last 24 Hours:
0
Loss of Power Link Failures:
0
Loss of Signal Link Failure:
0
Link Train Errors:
6
Unavailable Seconds:
2406
Transport Mode:
ADSL
Path Parameter:
8/35
Priority:
UBR without PCR
Service Type:
LLC Bridged
DSL Power

Levels
Downstream
Upstream
SNR
8.9 dB
10.0 dB
Attenuation
40.2 dB
26.0 dB
Power
20.1 dBm
12.4 dBm
DSL Transport

Transport
Downstream
Upstream
Packets:
702841
531844
Error Packets:
28367
0
24 Hour Usage:
12.289 MB
0.000 MB
Total Usage:
1018.137 MB
0.000 MB
DSL Channel

Levels
Near End
Far End
Channel Type:
Fast
Fast
CRC Errors:
28367
883
15 Minute CRC:
3
0
RS FEC:
0
0
15 Minute FEC:
0
0

bds85466

join:2012-11-17
Waconia, MN
reply to Brano
said by Brano:

Is this a PPPoE connection?

Are you asking if it's an ethernet connection to the router? Yes.

Forgive me I'm not fluent in networking.

Still haven't found lingo to Nail the connection in the firmware....on to another day...gotta get to bed.

Thanks for your help!


Brano
I hate Vogons
Premium,MVM
join:2002-06-25
Burlington, ON
kudos:14
Reviews:
·TekSavvy DSL
·Bell Fibe
Check Advanced -> WAN settings and post screenshot please.
Going by this »qwest.centurylink.com/internethe ··· ock.html you should have PPPAutoConnect enabled.

bds85466

join:2012-11-17
Waconia, MN
said by Brano:

Check Advanced -> WAN settings and post screenshot please.
Going by this »qwest.centurylink.com/internethe ··· ock.html you should have PPPAutoConnect enabled.

I'll do this when I get home and post it.


nschwen

@embarqhsd.net
I was having this very same issue, and read this thread with great interest. Also I was having trouble with some devices connecting via WiFi (would connect one day, but be unable the next, even in the same room as the router). This and other issues has convinced me the router firmware is basically just bad. Not horrible, but quite buggy.

I was able to get a stable connection by turning off the WiFi and putting the device into 'Bridge' mode (found under Advanced->WAN settings). This basically turns it into a simple modem, no router capabilities at all. This mean however you need a different device to handle router functions. I had a CradlePoint MBR 95 from my days of using wireless modems (very solid performer). Worked without any configuration. Just ran a network cable from one of the network ports on the Zyxel to the WAN port on the CradlePoint, and poof, internet. It's been stable for the last 24 hours, zero connection drops while gaming or using work VPN (both were a real pain with the drops every 15 mins).

Once you set the Zyxel into Bridge mode, you can't connect to it's GUI pages any longer; it's just a dumb modem now. To get it back to 'normal', you have to do a hard reset using the pinhole button on the back. Both bridging and resetting are detailed on Zyxel's website (via videos hosted on YouTube).

If Zyxel comes out with a firmware update I may give it another try, because I did like some of the monitoring features they offer. But until I feel like rolling the dice again, this setup is working great so far!