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GRE Tunnel - No Traffic

Amin Shaikh
Level 1
Level 1

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.

On SITE "B"

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

4 Replies 4

royalblues
Level 10
Level 10

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

HTH

Narayan

Hello, If I manually down the Tunnel1 still have the same issue.

It looks like encryption/decryption issue

Hi,

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.

Hi Guyz. I am stuck on this, still unable to make it work with all Tunnels.

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