Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 

Workaround for SRP500 Issues

** Update **

These and a number of other issues have been addressed in SRP520 MR3.  Please see https://supportforums.cisco.com/docs/DOC-13853 for details on how to access this code.

There have been a number of reports of the SRP500 becoming unresponsive after a period of use.

Symptoms have included, but are not limited to:

  • DHCP failing
  • No web access to GUI
  • Port forwarding stops
  • DNS proxy fails

Thanks  to all of you that have provided feedback and advice, this had helped  us to isolate the issue, which we are now working hard to fix.   Specifically, remote attacks against the voice ports are causing the  failure of various device services.

In the mean time, it is possible to protect your SRP from these issues by configuring one of both of the following parameters.

Firstly, configure your device to accept only SIP messaging from configured voice services.

To achieve this, log in using the admin user role and select the "Voice" configuration tab.

Select "Line 1" and scroll to "SIP Settings", then set "Restrict Source IP" to yes.

Repeat this configuration for Line 2.

In  addition, if you are not using the voice ports on your SRP, it is good  practice to disable them.  To do this, set "Line Enable" to no for both lines.

One settings have been made for both lines, click on Submit at the bottom of the screen.

source.JPG

Comments
New Member

Hi Andrew,

I'm a very unhappy owner of a Cisco SRP521W based in New Zealand and I have to say I'm at the end of my patience with Linksys/Cisco. I purchased this model two weeks ago to replace a Linksys WRP400 that was suffering from a constant slow down of internet/WAN speed. I had several opinions from network administrator aquaintances that the WRP400 was bad, so I bit-the-bullet and forked out over NZ$300 for this newer (aparently better) model which after reading the product literature would be the perfect device for our office.

Much to my disgust, I discovered the SRP521W is suffering the exact same symptoms. What's worse, the more I try and find help on the problem, I find that there are many many forum topics raised and that most of the Linksys/Cisco range is suffering the same issues. Can that be true?!

We have been experiencing consistent and gradual WAN speed decreases ever since we've been using your equipment, and it's got to the point now where I've almost been in tears trying to troubleshoot and correct this problem. Enough is enough. We run a small online business, with VoIP and a web/mail/ftp server, and the daily need to be offline for up to 2 minutes (while we switch off then on and wait for the SRP521W which appears to reboot twice) is completely unacceptable. Our customers lose service during their uploads, our phone service is knocked out, and also our rankings with Google suffer with constant "Network Unreachable" errors for our indexed pages.

Here's our setup:

  • 100Mbps symmetrical fibre/cable internet service
  • Cisco SRP521W with:
    • 1 LAN port for a web/mail/ftp server for our small online business
    • 1 LAN port for an 8-port switch for our office network (up to 5 computers connected)
    • 1 Phone port used for VoIP services through WorldxChange (NZ) Ltd. (I have confirmation through WxC that their remote provisioning has RESTRICT SOURCE IP set to YES).
    • 1-2 devices connected to WLAN at any one time.

(Note: we previously had the same setup with the WRP400)

Here's a description of our problem:

After a reboot the SRP521W will function at full WAN speed of about 90Mbps/86Mbps down/up. After about 5 hours uptime, the next speed test will yield about 77Mbps/68Mbps. After about 10 hours uptime, 64Mbps/62Mbps. After 28 hours uptime, we are down to 27Mbps/30Mbps. And it keeps going down from there until we eventually get pissed off with slow (or no existent) online services - usually a day or two. WLAN users also notice a drop off in throughput as the WAN speed drops, and the VoIP quality suffers too after about 48 hours uptime - if we leave it that long.

The reason I now know that this is a Linksys/Cisco problem is because I have swapped the SRP521W for a cheap TP Link router that I borrowed, and after 3 days of use, there has been NO LOSS OF WAN SPEED.

So, this message is literally a plea for help. Cisco PLEASE PLEASE PLEASE help us sort this out. We're sick of spending money and sick of waiting for you.

Regards,
Mike Walen
www.KeyImagery.com

New Member

Hey Mike,

I don't think I'm going to  waste my time looking at the Cisco SRP-521W as a replacement for the  WRP-400. Maybe it time to accept that an "all-in-one device" is not the best solution, at leaset not from Cisco right now. I have heard of way too many open issues in this forum and others that are not getting anyone's attention at Cisco.


As a VoIP  services provider I can't afford the customer frustration and downtime. I  think I'm just going to go back to a good low-end Router/Firewall/WiFi  device like the SonicWall TZ-100W and keep the ATA out of the router. There are plenty of good ATAs on the market that work well as SIP and/or IAX connections.


I welcome your  comments on another $200-$400 USD price range Router/Firewall/WiFi device  (Cisco or other) that has good control over QoS for VoIP traffic and  bandwdith management. I would also like my ideal small office router to  have SNMP.

http://www.carolinadigitalphone.com/wp-content/themes/Carolinanet/images/logo.gif

Nicky Smith, President

http://www.carolinadigitalphone.com

+1-336-544-4000 Ext 105

nicky.smith@carolinadigitalphone.com

Cisco Employee

Hi Mike,

Thanks for your comments.  I'll make our release candidate for MR3 available to you now.  This includes many fixes for issues that you and customers like you have been seeing over the last six months.  I hope you find that this improves your experience with this product.

Regards,

Andy

New Member

Hi Andrew,

We're eagerly trying 1.01.19 RC now on our SRP521W and will report back in a few days with some results. Thanks for your response, it's really appreciated.

Kind regards,

Mike Walen.

New Member

Hi Andrew,

Well we've tried the 1.01.19 RC firmware for over 30 hours now, and while there is a small improvement, I don't think it's there quite yet. Below is a section from a table that I have been updating regularly with my findings. Although we're experiencing the slow down just like always, it seems to be bottoming out at around 55Mbps Down/Up, whereas previously we'd be down to about 30Mbps and it would still be decreasing (to eventually become unresponsive).

Although we're getting 55Mbps, consistently at this stage, we're noticing that online services (e.g. web browsing, streaming video, downloading large files) are not snappy and quick like they are after a reboot but are still sluggish and slow (almost like we're on an ASDL connection despite having a 100Mbps fibre connection).

DateTimeRouter UptimeD/loadU/loadPing
20/01/201105:30:000:00:0089764
20/01/201111:20:004:50:0081724
20/01/201111:50:005:20:0078744
20/01/201114:10:007:40:0081734
20/01/201115:55:009:25:0059634
20/01/201117:00:0010:30:0057604
20/01/201122:15:0015:45:0056604
21/01/201108:15:0026:45:0055594
20/01/201112:00:0030:30:0055594
20/01/201113:10:0031:40:0055574

As you can see from the table, the speeds start off excellent, then slowly decrease down. We will continue to use this RC firmware, but as you can appreciate, this is still well below our expectations and what we require from this device.

We have about a week left before I will have to return the SRP521W to our supplier for a refund and begin the search for another suitable router so I REALLY hope something big happens in that time

If you require more information about our setup or configuration, please don't hesitate to contact me.

Regards,
Mike Walen

www.KeyImagery.com

New Member

Hi again Andrew,

Well, we've been using the 1.01.19 RC firmware for 4 days now and I am unimpressed again. I noticed our router mysteriously return to high-speed on two mornings now, which was great, but it made me curious and a little suspicious as to why it suddenly went back up from being so slow.

From what I can tell, the 1.01.19 RC firmware upgrade is basically a script that reboots the router every 48 hours.

I can't see any reference to this feature in any of the GUI menus, mainly because my VoIP provider has remote provisioned and locked down the admin side of things, but I can clearly see the router is rebooting every second day at 5:30am (which is when I installed the RC firmware) just by looking at the up-time clock in the status section.

Now I can't speak for anyone else using a SRP500 series router, but this is literally a poor bandaid to cover the real problem(s). As mentioned in a previous post, we host an in-house web/mail/ftp server behind the router and rebooting of the SRP521W (at any time of the day) means a loss of service to our customers and is completely unacceptable.

So, all I can say now is good luck in fixing the SRP500 series (and the WRP400) routers Cisco. I'm returning our SRP521W back to our supplier and looking for a better option.

All the best.
Mike Walen.

New Member

Hello. I apologize for imperfect English. My router also has problems with speed. In version 01.19RC not noticed until now voip termination. Earlier in the downlink as 01.11 voip interrupted. I hope that Cisco will improve the firmware to make it perfect. Because the router was very expensive and unfortunately, this translates into quality. Regards Arthur.

Cisco Employee

Hi Mike,

Many thanks for your feedback and specifically the details of the throughput degradation.  Before your report, I hadn't been aware of this, but will certainly commence an investigation now (I regret that this will be too late for you now).

I will also make a point of understanding why the performance bounces back every couple of days - there is no reboot script in this release (although there may be some monitoring processes that periodically clears up unused resources).

Best Regards,

Andy Hickman

New Member

Hello. Please note the CPU usage before and after the restart. Regards Arthur.

New Member

We have just upgraded to the SRP 527W router because of the scalability of services on offer. Currently we are not using it for VOIP at all, but without fail since we installed afetr around 24 hours/48 hours after a reboot the Wireless network mysteriously is unconectable which suggests DHCP failure and also there is no access to the GUI via 192.168.1.254 or a specifically set up address of 1.1.1.1.

The only option to get round this issue is to reboot every 48 hours which is completely unacceptable. There is not even an option within the GUI to upgrade firmware either in the admin screen.

I take it this is a known issue now, but what is the solution to:

- DHCP failure

- No access to Web GUI

I thought this was going to be the router that ends all of our problems and lets us get on with business, but it looks like i was wrong.

Cisco Employee

Hi Malcom,

Which firmware are you using?  The two symptoms that you describe are characteristic of the issue described initially in this thread.  Have you configured the work around setting? (it doesn't matter whether you use voice or not, the workaround would still be required).

Also, as mentioned above, this issue is fixed in MR3 (I'll post a copy of the release candidate for you if you wish to try it in advance of formal posting on Cisco.com)

Please let us know (via this thread) if you continue to have issues following either configuration of the work around, or upgrading to the MR3 release candidate.

Regards,

Andy

Cisco Employee

Thank you Artur,

It's not unusual to see the CPU spike from time to time - especially on intially boot.  Are you saying the the CPU stays at 99% for a long time?

Is this using the MR3 release candidate code?

We will investigate the throughput degradation issue this week.

Regards,

Andy

New Member
Model:SRP527W, ADSL2+ AnnexA, 802.11n ETSI, 2FXS/1FXO
Version ID:V01
Hardware Version:4.0.0
Boot Version:1.1.17 (Jan 4 2010 - 21:15:46)
Firmware Version:1.01.09 (001) Apr 7 2010
ADSL Firmware Version:0.41.0
Recovery Firmware:1.01.09 (001)
Setup Wizard Version:1.01.09 (000)
WAN MAC Address:
Current Time:Mon, 31 Jan 2011 14:00:21

Thank you for the release files, I have sent you an email with a question regarding this.

Thanks.

New Member

Dear Andrew. My router firmware is version 01.19 MR3 RC. As you've seen the peak occurs all the time downloading the file. Then it drops performance. The processor achieves almost 100% load. After the restart downloading the same file and then it's full capacity. Then, the CPU load reaches 50% all the time downloading the file.Please note the speed. Before the reboot is wrong. After a reboot everything returns to normal for several hours.Please click on my images. My post earlier in this thread.The first picture when you reboot. The second image before rebooting the router.The difference can be seen very clearly.

New Member

I have been checking with our test devices looking for the slow down, Micheal you are a customer of ours, the device you have resyncs every 48 hours on it's config profile.

I am running the same unit on a test Fibre circuit running a 30/6 Mb profile have been running this for 3 almost 4 days and no impact on throughput that I can see, Voice operation, downloading via LAN and wirelesss are running at peak.

New Member

I sent a team Andrew Hickman * tgz files for analysis. You may be able to solve the problem. I believe it. We are waiting for a solution.
In my case I set anything in the field of traffic shapping.

New Member

Hi pmoore@wxc.co.nz,

I tried to troubleshoot this for literally weeks spending far too many hours trying to figure out why my throughput was gradually decreasing (only to be brought back to full speed after a reboot). The WRP400 that I had before this was experiencing the *exact* same issue. I tried everything including:

·Purchasing new LAN cables and a new WAN cable to remove those variables from the equation.

·Elevating the router off the desk and having a desk fan pointed right at it so that air could freely circular around it to remove overheating from the possible causes list.

·Factory resetting over 10 times (sometimes using the 30/30/30 method) and reconfiguring from scratch trying various firmware versions.

·Going without our VoIP phone lines for a day to see if it was our WxC's remote provisioning/configuration that was the cause.

·Plugging the router power adapter in to a different power outlet and making sure the power cable didn’t go anywhere near the WAN or LAN cables.

·Talking with our fibre company and getting them to check for any line errors or problems with their hardware in our building.

·Experimenting with different MTU settings without success.

·Contacting WorldxChange NZ who confirmed that RESTRICT SOURCE IP was set to YES in their configuration.

The last firmware I tried 1.01.19 RC was definitely doing a full reboot every 48 hours, as your log will no doubt show. That was pretty much the last straw for me. I've now returned the SRP521W for a refund and have installed a TP-Link TL-WR1043ND and Linksys SPA2102 which have been running flawlessly for the last week. My speeds have consistently been 92/84Mbps down/up on our 100Mbps fibre connection. It obviously appears from my view that the Cisco/Linksys all-in-one devices (or the specific configuration of those models) are the problem.

Regards,

Mike Walen.

New Member

Hi Andrew,

I noticed the SRP521W does not support Multicast routing and hence my Apple devices on the network do not see each other.

Will the v19 firmware include multicast support?

Cheers,

Matt

New Member

Dear users. After 6 days of continuous operation of the router I have this problem. Just after the wifi to download the file. Despite the saturation of the download link in 50% voip very much interrupted. MR3 firmware version 01.19. Restart the router and the problem is not for a few hours.

New Member

Hello. Andrew as the progress of work on software router? Will it work better? I really eagerly waiting for a good firmware to the router.

Cisco Employee

Hi Artur,

We've been trying to recreate your issue in our lab, but so far haven't seen the same results as you.  There are some interesting traces in the debugs your sent though, we are working through those now.  Could you please send me your router configuration - use the following link, changing the the password and IP to suit yours.

http://192.168.15.1/admin/config.xml&xuser=admin&xpassword=admin.

Please do not post the config here - send it to me directly.

Cisco Employee

Just a quick note to all....we're still trying to recreate this issue.  An update will be provided when we make some progress.

New Member

Have tested the MR3 firmware and noticed all the multicast packets are now being transferred between the WiFi and LAN ports so not sure if there was a specific fix for this but it is all working now - thanks.

Cisco Employee

Hi Matt,

Yes, that was a specific fix in MR3.

That issue was discussed in.  The thread here refers to a different issue.

Andy

New Member

Hello. Can you specify what version you have a hardware router?

New Member

SRP520_1.01.19_004_010711_1457.bin

Just ran the same test and after 26 days uptime, I still don't see this issue from my testing, this box is worked pretty hard with a IPBX UC320 and SIP Phone 525G with a couple of laptops sitting behind it and the box has been rock solid for me at the moment

New Member

So please write what version you have equipment? My router has a problem. I sent it to the dealer. Maybe my router has a different version than what your motherboard?

New Member

Hello everyone. After several attempts, the router is configured managed to get it to work properly. Namely, the router should turn off UPNP. And all the ailments subside. UPNP now just need to fix. I thank Andy for it is he and his team detected a problem. Now working on fixing it. That it could explain why some of you do not have a problem. Regards Andy and his team.

New Member

Hi.
Testing this device atm and so far it took 5 days before needing to reboot the device as it lost sync.

Though the 'ADSL Status' section is a bit dodge ? Its still showing the down/up stream rate, even the device has already lost sync ? As in 'Interface Setup' it didnt show any IP address under WAN interface list ?

Also if I can ask here, the device supports TR069 yes ? I cant seem to find and docus for it ? help ?

Cisco Employee

Hi Jowan,

Yes, TR069 is supported by the SRP series.  I'll share some specific detail with you directly.

Andy

7013
Views
10
Helpful
30
Comments