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

Last Modified

Nov 27, 2020

Products (2)

  • Cisco 2600 Series Multiservice Platforms
  • Cisco 2600 Series Multiservice Platforms

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)

Symptom:
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

Conditions:
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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