GRE Tunnel - No Traffic

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Oct 24th, 2009
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Hello, There are 3 IPSEC GRE Tunnel between SiteA & SiteB.

Tunnel25 is up and traffic passes between siteA and SiteB, on other tunnels interesting traffic doesnt passes.

But when checking "SH crypto ISAKMP SA" displays all 3 crypto state "QM_IDLE" && STATUS "Active"

configuration of SiteA & SiteB is uploaded on this post.


sh crypto ipsec sa

#pkts encaps: 10082, #pkts encrypt: 10082, #pkts digest: 10082

#pkts decaps: 0, #pkts decrypt: 0, #pkts verify: 0

#pkts compressed: 0, #pkts decompressed: 0

#pkts not compressed: 0, #pkts compr. failed: 0

#pkts not decompressed: 0, #pkts decompress failed: 0

#send errors 1418, #recv errors 0

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royalblues Sat, 10/24/2009 - 14:08
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The crypto configs will be parsed sequentially in the IOS and hence the traffic will always pass via the first tunnel as the interesting traffic is same for all the tunnels



Amin Shaikh Sat, 10/24/2009 - 21:50
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Hello, If I manually down the Tunnel1 still have the same issue.

It looks like encryption/decryption issue

Amin Shaikh Sun, 10/25/2009 - 05:06
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SiteB Tunnel initiation is from 3ISP to same destination. could this be causing the issue. If I plug a static route to the destination piblic IP then the tunnel is up.

Amin Shaikh Mon, 10/26/2009 - 13:02
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Hi Guyz. I am stuck on this, still unable to make it work with all Tunnels.


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