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www.cisco.com down?

Answered Question
Jul 3rd, 2012
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Is anyone else getting a DNS error when trying to access www.cisco.com?


I get a protocol redirect from http://www.cisco.com to https://www.cisco.com, and then the following error


Service Unavailable - DNS failure

The server is temporarily unable to service your request.  Please try again later.

Reference #11.14dcf180.1341364559.1740d61


I'm pretty sure it's not my DNS - I can traceroute to www.cisco.com and it resolves fine. Logging into the support forums works via the SSO site, as does the support forums themselves (obviously), but the main site just doesn't respond.


Cheers

Correct Answer by damiangoh about 5 years 1 month ago

I am also facing the problem. Cant seem to enter the cisco web site.

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Leo Laohoo Tue, 07/03/2012 - 18:25
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Must be your shoes Darren.  

darren.g Tue, 07/03/2012 - 18:28
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leolaohoo wrote:


Must be your shoes Darren.  


Hey! There's nothing wrong with my shoes! They're all shiney and bright, even! :-)

darren.g Tue, 07/03/2012 - 18:40
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Must be something weird in the latest update to Firefox nightly causing it, because when I Google cisco.com and follow the link, it works.


Weird!

zoltan.karpati Sat, 06/06/2015 - 05:37
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Thank you for the trick! I have been experiencing the same issue for a couple of hours today:

Service Unavailable - DNS failure

The server is temporarily unable to service your request. Please try again later.

Reference #11.c90a1602.1433593459.151c758f

I try to access the topics directly as I am preparing for the CCIE lab so I am trying to get familiar with the way topics are organized. It works if accessing through google. Hopefully google will be available if the "Select Your Product..." page will be unavailable during the exam :)

 

Thank you,

 

Zoltan

Correct Answer
damiangoh Wed, 07/04/2012 - 00:17
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I am also facing the problem. Cant seem to enter the cisco web site.

darren.g Wed, 07/04/2012 - 17:35
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Well, at least it wasn't just me!


So Ner Ner, Leo! Not my shoes at all!


:-)

Jeremy Justin Mon, 12/03/2012 - 10:03
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I am also receiving a DNS error when trying cisco.com/go/software. This error also shows when I go directly to support and enter a specific phone model, the next screen shows this error:

Service Unavailable - DNS failure

The server is temporarily unable to service your request. Please try again later.

Reference #11.493de93f.1354557577.2c2c6266

JohnUrbanek Mon, 12/03/2012 - 14:26
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Experiencing the same problem just about all day today.  Have tried from several computers and locations.


Service Unavailable - DNS failure

The server is temporarily unable to service your request.  Please try again later.

Reference #11.493de93f.1354573371.2ec96f5c

craig.phillips@... Mon, 12/03/2012 - 15:56
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Same here from Vancouver, Canada:


Service Unavailable - DNS failure

The server is temporarily unable to service your request.  Please try again later.

Reference #11.493de93f.1354578772.2f96bdd4



Happens at complete random times. Some computers can't get to www.cisco.com at all and other will be able to browse for awhile and then hit it.

bnidacoc Tue, 12/04/2012 - 07:47
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Everyone here has been reporting this.  Different browsers (IE, Chrome, FF), I even got it at home a few days back, so I know it is not our network.

chadreynolds Tue, 12/04/2012 - 07:51
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I had the same issue, but DNS is resolving for me now as 12/4/2012 @ 7:50AM PST.  Please refresh your browser.

bnidacoc Tue, 12/04/2012 - 08:02
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I doubt this is a "my DNS issue."  This message is an HTML formated response to the users of their web servers.  Cisco's DNS server arrays must be experiencing problems as their servers can't resolve something nessesary for forwards/logging/misc.


I wonder if eventually Cisco will remove the details of the HTML response to obfuscate the matter and we'll get a vague response.

JohnUrbanek Tue, 12/04/2012 - 08:47
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I narrowed down this problem to Akamai's CDN -- which Cisco.com uses.  Note that the details below might change but this is as it exists at the moment.


You can see below that www.cisco.com. makes its way through a pile of CNAME's before arriving at e144.dscb.akamaiedge.net. which has an A record.


C:\Users\johnu>dig @8.8.8.8 www.cisco.com. a

; <<>> DiG 9.8.1 <<>> @8.8.8.8 www.cisco.com. a
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 16243
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.cisco.com.                 IN      A

;; ANSWER SECTION:
www.cisco.com.          2537    IN      CNAME   www.cisco.com.akadns.net.
www.cisco.com.akadns.net. 225   IN      CNAME   wwwds.cisco.com.edgekey.net.
wwwds.cisco.com.edgekey.net. 1304 IN    CNAME   wwwds.cisco.com.edgekey.net.globalredir.akadns.net.
wwwds.cisco.com.edgekey.net.globalredir.akadns.net. 228 IN CNAME e144.dscb.akamaiedge.net.
e144.dscb.akamaiedge.net. 19    IN      A       184.87.144.170

;; Query time: 31 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Tue Dec 04 10:36:48 2012
;; MSG SIZE  rcvd: 212


From here I used Firefox's Live HTTP Header extension to make a request to e144.dscb.akamaiedge.net. while sending www.cisco.com for the Host: header.



Banging on the Replay button a few times yields different results.  Sometimes www.cisco.com loads (without CSS and such -- which is fine given the crude test) and most of the time the venerable Service Unavailable error rears its head.


This looks like an Akamai CDN web server or service issue.


Please work with Akamai to get this fixed as this issue is greatly impacting our ability to interact with Cisco (support, downloads, data sheets, etc.).

bnidacoc Tue, 12/04/2012 - 10:51
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The end of my conversation with 184.87.144.170...



HTTP/1.1 503 Service Unavailable
Server: AkamaiGHost
Mime-Version: 1.0
Content-Type: text/html
Content-Length: 269
Expires: Tue, 04 Dec 2012 18:44:02 GMT
Date: Tue, 04 Dec 2012 18:44:02 GMT
Connection: keep-alive
Vary: Accept-Encoding



Service Unavailable

Service Unavailable - DNS failure


The server is temporarily unable to service your request.  Please try again
later.


Reference #11.493de93f.1354646642.36acd462

      


EDIT: Oh, this was http://www.cisco.com.  I can't get to the support page to open a new TAC case, I go to support..cisco.com, I get refered to http://www.cisco.com/tac/, but again, it responds with "Service Unavailable."  I've been getting this since last week, however, it is much more frequent today.

Mike Hale Tue, 12/04/2012 - 16:13
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This has been an issue for us for about a week now as well.


Come on Cisco...fix your site.  > : (

pmettewie Wed, 12/05/2012 - 07:42
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We too have this issue. We have a workaround (not a fix) from our ISP (who is working on why this is happening.)


  • We issue an "IPCONFIG /flushdns" at the command line.
  • We insert the IP address of the DNS routers our ISP has assigned to us.
  • There are several ways to do this - here is one. (If you have documents open, save and close them to be safe, you will be re-initializing the NIC on this machine
    • Go to Control Panel
    • Click on "Network and Sharing Center"
    • Select "Change Adapter Settings"
    • Highlight the active NIC
    • Right-click the icon for that NIC
    • Select "Properties"
      • Select the appropriate IP version (IPv4 or v6) - "Internet Protocol Version 4", etc.,
      • Find the section titled "Use the following DNS server addresses"
      • Put in the addresses for the primary and secondary DNS server addresses your ISP has assigned to you.
      • Click "OK" until you are out of the Properties box.
      • Allow some time (30 seconds should be enough - but if you encounter issues with resolution, re-start the computer.)
      • You should now be able to get to any portion of Cisco.com.


      Again, I underline the fact that this is just a workaround and the problem still remains. It could be a broken DNS record or something else entirely. Contact your ISP if you are at a standstill.


      Good luck - this is not a trivial issue Cisco! Please understand that there are customers out there that are experiencing problems researching, supporting and administering router, switches and other equipment.


      Paul

      JohnUrbanek Wed, 12/05/2012 - 08:37
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      @pmettewie


      That works because changing name servers for recursive resolution (to your ISP NS's or some other) -- the source IP seen by the Akamai DNS load balancer changes to the new name server -- and the Akamai records returned send you to a different Akamai data center -- presumably one that does not have this problem.


      However, the Akamai data centers getting returned to a bunch of us in this thread are/have been suffering from this problem.


      Changing preferred name servers or recursive resolvers for an enterprise shouldn't (or can't in some cases) be done on a whim.  A conditional forwarder (Microsoft DNS) could be used as well -- we implemented one yesterday (using another ISP's NS's only for cisco.com and it helped).


      On a side note the Akamai data center we were being redirected to for www.cisco.com (final A record of 184.87.144.170) does seem to be working a lot better today.

      schuegel Wed, 12/05/2012 - 10:13
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      Thanks for the input on this.  We have people digging into the problem.  Sorry for any inconvenience.


      Scott Huegel

      Analyst Business Operations

      Cisco

      Leo Laohoo Wed, 12/05/2012 - 13:53
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      Hi Scott,


      Is this issue affecting emails?


      I have four separate TAC Cases and I have not received any emails from TAC engineers all day since yesterday.

      schuegel Wed, 12/05/2012 - 15:13
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      Hello Leo,


      No there shouldn't be any impact on email.  You might consider a follow-up via the CIN.


      Scott Huegel

      Analyst Business Operations

      Cisco

      Leo Laohoo Thu, 12/06/2012 - 13:25
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      Hi Scott,


      Me bad.  MS email cluster got f**k.  Now I know where the term "cluster faq" comes from. 

      schuegel Wed, 12/05/2012 - 15:30
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      We continue to investigate the problems above and have opened a case with Akamai.


      Scott Huegel

      Analyst Business Operations

      Cisco

      JohnUrbanek Thu, 12/06/2012 - 11:41
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      Scott,


      Please post an update when you have one.  This issue is having a major impact on our ability as a partner and reseller to conduct business with Cisco.

      schuegel Thu, 12/06/2012 - 12:39
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      If anyone is experiencing this problem, if you could kindly click on this link, just a click is required, and this will help us gain additional information for Akamai:


      http://ip.akamai.com/case/B-C-HP5ULX


      Thank you for your patience and support.


      We continue to work on this problem.


      Scott

      Leo Laohoo Thu, 12/06/2012 - 13:26
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      Thank you for submitting your diagnostic information. No further action required.

      Tracking Number: 1453

      Thanks for the link, Scott.


      No issue for me.

      schuegel Thu, 12/06/2012 - 15:12
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      Thank you everyone for your patience.  We believe the problem has been fully corrected.  It additional problems are encountered, please let us know.


      Again, thank you for your patience.


      Scott Huegel

      Analyst Business Operations

      Cisco

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