Cisco Bug: CSCul54111 - Core on ASR1002+ESP5 with QoS config
Mar 24, 2019
- Cisco ASR 1000 Series Aggregation Services Routers
Known Affected Releases
15.2(4)S 15.3(3)S 15.4(1)S 15.4(1.6)S 15.4(2)S 15.4(3)S
Symptom: This issue causes the ESP to crash while applying QoS Model F. The issue occurs with both small and scaling configuration. The problem occurs all ESPs including ISR and CSRs. Conditions: The problem occurs with both small and large configurations. It is timing related as it occurs after running asynchronously in which case the code executes the deferral path which was not clear the event processing flags upon completion. When these flags are not cleared, the code treats the condition as fatal; hence the ESP crash. While Model F is understood to be impacted by this problem it is conceivable this issue could occur with any configuration where the target interface handle for the policy is different from the parent interface handle, e.g. vlan queue on a GE interface. Model F Sample Configuration: policy-map grandparent class class-default shape average 10000000 class-map match-all p0 match precedence 0 class-map match-all p1 match precedence 1 class-map match-all p2 match precedence 2 policy-map child class p0 priority police cir 2000000 class p1 bandwidth remaining ratio 10 class class-default bandwidth remaining ratio 1 policy-map parent class class-default shape average 10000000 bandwidth remaining ratio 1 service-policy child interface GigabitEthernet0/0/0.4 encapsulation dot1Q 2 service-policy output grandparent The parent policy would typically be applied on a session on the vlan. The issue would typicall occur when the grandparent policy is processed on ESP.
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