Solved

errors on site-to-site vpn

Posted on 2014-04-24
10
375 Views
Last Modified: 2014-04-24
I have 4 site-to-site vpn with Cisco routers without ASA firewall. When I did the show crypto ipsec sa, I see send errors and recv errors. What are those errors? Can I see the meaning of those errors somewhere? Thanks
0
Comment
Question by:leblanc
  • 5
  • 4
10 Comments
 
LVL 94

Accepted Solution

by:
John Hurst earned 500 total points
ID: 40020387
If your VPN transmission is otherwise normal, then these are just miscellaneous retransmits with is a fundamental part of TCP/IP transmissions. Errors occur and are retransmitted.

If normal overall transmission, no issue so far as I can see.

If you have VPN errors (wrong data, nothing received, not working) post some errors here.
0
 
LVL 1

Author Comment

by:leblanc
ID: 40020445
Sure. Everything is working fine. I am just trying to validate those errors. I want to be able to tell my boss what types of errors it is, even though it is not affecting the VPN traffic. Thanks
0
 
LVL 94

Assisted Solution

by:John Hurst
John Hurst earned 500 total points
ID: 40020484
If all is well then they are just TCP/IP transmit errors that occur all the time. You can go nuts recording TCP/IP errors with CommView.

VPN is very subject to line drops, so the errors cannot be anything meaningful. Otherwise the  VPN would disconnect.
0
Create the perfect environment for any meeting

You might have a modern environment with all sorts of high-tech equipment, but what makes it worthwhile is how you seamlessly bring together the presentation with audio, video and lighting. The ATEN Control System provides integrated control and system automation.

 
LVL 1

Author Comment

by:leblanc
ID: 40020566
So there is no way to see the meaning of those errors, unless I monitor the connection or do some debug. Correct?
0
 
LVL 94

Assisted Solution

by:John Hurst
John Hurst earned 500 total points
ID: 40020602
That is correct. If all is working well (you say it is), then you would need Wireshark (Free) or CommView (tamos.com) which is really good but not free, and do some packet analysis to see what is there.

The analysis is very detailed and not always fruitful if just run-of-the-mill errors.
0
 
LVL 1

Author Comment

by:leblanc
ID: 40020622
Got it. Thanks
0
 
LVL 10

Expert Comment

by:Rafael
ID: 40020695
Yes that is correct.  As John indicated you'll go nuts trying to decipher the messages.

-Rafael
0
 
LVL 94

Expert Comment

by:John Hurst
ID: 40020710
So I think you have all you need and you did not post any specific errors. So if that is all, please do not forget to close out the question.  Thank you.
0
 
LVL 94

Expert Comment

by:John Hurst
ID: 40020772
@bobon - Thanks much. And despite what was said above, it is worth your while, in a spare moment, to look through packets just to see what is there.
0
 
LVL 1

Author Comment

by:leblanc
ID: 40020841
Yes. I will have to be on site to setup Wireshark for the monitoring. IT is too bad you can see the errors but we don't know what it is until we look into the packets. I don't have a lot of experience with VPN. So if I look at those errors numbers, I will assume that something is wrong with the connection. But like you mentioned it may just be retransmissions.
0

Featured Post

Flexible connectivity for any environment

The KE6900 series can extend and deploy computers with high definition displays across multiple stations in a variety of applications that suit any environment. Expand computer use to stations across multiple rooms with dynamic access.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
parental control on huwei HG658b 1 26
SOC, SIEM, IPS and FW 4 33
Home security 15 43
Upgrading from Sonicwall Tz210 6 14
As cyber crime continues to grow in both numbers and sophistication, a troubling trend of optimization has emerged over the last year.
If you are looking at this article, you have most likely been hit by some version of ransomware and are trying to find out if there is anything you can do, or what way you should react - READ ON!
Sending a Secure fax is easy with eFax Corporate (http://www.enterprise.efax.com). First, Just open a new email message.  In the To field, type your recipient's fax number @efaxsend.com. You can even send a secure international fax — just include t…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

828 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question