NGFW PALO ALTO and Azure VPN Ipsec Issue

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NGFW PALO ALTO and Azure VPN Ipsec Issue

L0 Member

Hi All,


We had observed an issue with Palo Alto and Azure vWAN IPsec tunnel. the Tunnel seems disconnected and getting following log messages time and again.

2022-03-07 11:48:14.506 -0600  [PWRN]:[500] -[500]:0x1c787140 unknown ikev2 peer

2022-03-07 11:54:17.013 -0600 [PERR]: { 4: }:[500] -[500]:(nil) retransmission count exceeded the limit
2022-03-07 11:54:17.013 -0600 [INFO]: { 4: }:[500] -[500]:(nil) closing IKEv2 SA IKE_Gateway:537, code 5
2022-03-07 11:54:18.344 -0600 [PNTF]: { 4: }: ====> IKEv2 IKE SA NEGOTIATION STARTED AS INITIATOR, non-rekey; gateway IKE_Gateway <====


Any suggestion Pls ?


Community Team Member

Hi @BrajeshPatel ,


Maybe this KB article can help you with this:

VPN Failing with Error 'Unknown ikev2 peer'


Hope this helps,



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