Invalid spi for destaddr

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Apr 30th, 2007
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I keep getting the warning message "decaps: rec'd IPSEC packet has invalid spi fro destaddr" for three routers using a site-to-site vpn. The users have complained about random lose of connectivity and this seems like the only thing that jumps out. The routers are Cisco 871's and they are connecting to a Netscreen 25 at our main office. Any advice on stablizing the VPN?

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thomas.chen Fri, 05/04/2007 - 14:17
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received IPSec packet specifies an SPI that does not exist in SADB. This may be a temporary condition because of slight differences in the aging of SAs between the IPSec peers or because the local SAs have been cleared. It may also be caused by invalid packets sent by the IPSec peer. This activity could be considered a hostile event.

If the local SAs have been cleared, the peer may not know. In this case, if a new connection is established from the local

router, the two peers may reestablish successfully. If the problem occurs for more than a brief period, either attempt to establish a new connection or contact the peer administrator

eyecentersouth Mon, 05/07/2007 - 09:40
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Would increasing the lifetime reduce the number to times this happens?

Jon Marshall Tue, 05/08/2007 - 03:22
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yes it would if you are getting the error messages because of the SA lifetimes expiring and renegotiating.




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