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Traffic over VPN tunnel does not pass for several seconds during policy installation on Security Gateway (which causes traffic loss)
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Technical Level
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| Solution ID |
sk55244 |
| Technical Level |
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| Product |
IPSec VPN |
| Version |
R75, R76, R77, R77.10, R77.20, R77.30, R80.10, R80.20, R80.30 |
| Platform / Model |
All |
| Date Created |
07-Oct-2010
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| Last Modified |
19-Apr-2021
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Symptoms
Traffic over VPN tunnel does not pass for several seconds during or after policy installation on Security Gateway (which causes traffic loss).
Kernel debug ('fw ctl debug -m fw + drop') shows:
... dropped by vpn_encrypt_chain Reason: encrypt drop;
Security Gateway with SAM card might enter a kernel panic (crash) in the following scenario:
- traffic is currently passing over VPN tunnel (encrypted UDP load)
- Security Gateway is rebooted
- instead of rebooting, Security Gateway enters a kernel panic
Cause
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VPN Link Selection is being reset during policy installation. This causes timeouts until VPN peers can be resolved again.
Note: In some cases, certain VPN peers can take longer to re-establish, which would result in similar losses up to several minutes after policy push. (ID 02338534)
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SAM card might crash in certain scenario while processing VPN traffic (related to the above cause). (ID 02277594)
Solution
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