The implementation of QoS is similar in all VOSS switches but there are some differences as summarized in the following table.
|
QoS |
VSP 4450 Series |
VSP 7200 Series/VSP 8000 Series/VSP 4900 Series |
5520 Series/VSP 7400 Series |
VSP 8600 Series |
XA1400 Series |
|---|---|---|---|---|---|
|
Ingress traffic |
Policing |
Port-rate limiting |
Not available |
Port-rate limiting |
Not available |
|
Egress traffic |
Shaping |
Shaping |
Shaping |
Shaping |
Follows default queue profile weights |
|
Egress queuing CoS 0–5 |
WDRR |
WRR |
WRR |
WRR |
Heirarchy Token Bucket (HTB) |
|
Classification |
Routed packet classification |
No routed packet classification |
No routed packet classification |
No routed packet classification |
No routed packet classification |
|
Internal QoS derivation for ingress Layer 3 trusted port |
|
Always derived from DSCP |
Always derived from DSCP |
Always derived from DSCP |
Always derived from DSCP |
|
Automatic QoS |
Always derived from DSCP |
Always derived from DSCP |
Always derived from DSCP Not Supported on 5520 Series |
Derived from DSCP for routed traffic only. Automatic QoS is not available for switched traffic. |
Always derived from DSCP |
For QoS scaling and filter scaling information, see Release Notes for VOSS.