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Cisco Bug: CSCum15704 - IOS EasyVPN NEM with >20 IPSec SAs: QM Fails over multiple retries

Last Modified

Oct 14, 2019

Products (21)

  • Cisco IOS
  • Cisco ASR 901-6CZ-FS-D Router
  • Cisco ASR 901-6CZ-F-D Router
  • Cisco ME 3600X-24TS-M Switch
  • Cisco ASR 901-4C-FT-D Router
  • Cisco ASR 901S-4SG-F-D Router
  • Cisco ASR 901-6CZ-F-A Router
  • Cisco ASR 901S-2SG-F-D Router
  • Cisco ASR 901S-2SG-F-AH Router
  • Cisco ASR 901-6CZ-FT-A Router
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Known Affected Releases

15.4(0.1)T 15.4(1.14)T 15.4(1.17)T 15.4(1.4)T 15.4(2)S

Description (partial)

On the EzVPN Client, Phase-2 installation fails, and hence the SA stays in UP-IDLE state [Only Phase-1 is up: show crypto session]. And this status might keep flapping between DOWN-NEGOTIATING and UP-IDLE

ISR-G2 acting as EzVPN Client. EzVPN Server [ASA or ISR] has a split-tunnel ACL with more than 10 entries. And the EzVPN Client in NEM has more than 2 EzVPN inside interfaces, resulting in more than 20 IPSec SAs
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