I'm having problems with our VPN between a Cisco 2801 and a Fortigate. Basically we (2801) can't bring the tunnel up when we try to initiate a connection. We see send errors increase (and no traffic be encrypted or decrypted), and the following message is logged:
*Jun 5 09:14:55.715: %CRYPTO-6-IKMP_BAD_DOI_NOTIFY: DOI of 0 in notify message from x.x.x.x
We believe this is related to dead peer protection, which is not support on the 2800 series, so the engineer deactivated DPD on the other end but there was no change.
2801#sh crypto ipsec sa peer x.x.x.x
Crypto map tag: rtp, local addr y.y.y.y
protected vrf: (none)
local ident (addr/mask/prot/port): (10.3.30.40/255.255.255.255/0/0)
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...