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vpn tunnel mode versus transport mode

I am looking at a IPSec site-to-site VPN connection routers configuration and I see that one router has the transform set mode tunnel and the other side has transform set mode transport. Will this be a problem? The tunnel is up and running. But I am not sure if there are any errors in the background. Thanks
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leblanc
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leblanc
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3 Solutions
 
naderzCommented:
For a site-to-site tunnel you should be using the tunnel mode. I would make sure they match on both ends.
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leblancAccountingAuthor Commented:
what if they don't match. What command can I use to see what mode they are using on both end. Thanks
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lruiz52Commented:
Agree with naderz, both sides should be the same,

On router to router vpn you should use tunnel mode on both sides, check the link below for a good explanation of both modes and when to use;


http://www.firewall.cx/networking-topics/protocols/870-ipsec-modes.html
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naderzCommented:
I am not sure what devices you are using. Here is the command for a Cisco device

show crypto ipsec sa

Here is another link that also explains the different modes and their intent:

http://www.ciscopress.com/articles/article.asp?p=25477
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leblancAccountingAuthor Commented:
We are all Cisco gear
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naderzCommented:
Try the command above and the links provided for more information.
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