updates

Author: cumulusAnia

content/cumulus-linux-517/Layer-1-and-Switch-Ports/Quality-of-Service/_index.md

@@ -718,7 +718,7 @@ small-packet-probability 60
 Lossless headroom based on small packet probability is a Beta feature.
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-Cumulus Linux calculates the headroom size for lossless priority groups based on the assumption that all packets are small (64 bytes). On Spectrum-5 and earlier, the switch assumes a 100 percent probability of such packets arriving at line rate. As a result, the configured headroom is often larger than necessary, as traffic typically consists of a mix of packet sizes.
+Cumulus Linux calculates the headroom size for lossless priority groups based on the assumption that all packets are small (64 bytes). The switch assumes a 100 percent probability of such packets arriving at line rate. As a result, the configured headroom is often larger than necessary, as traffic typically consists of a mix of packet sizes.
 <!--On Spectrum-6, the switch assumes a 50 percent probability of such packets arriving at line rate.-->
 
 To enable more accurate headroom calculations, providing for better buffer allocation and improved shared buffer utilization, you can configure the probability of small packets on ports applied with a {{<link url="#priority-flow-control-(pfc)" text="priority flow control profile">}}. Based on the configured small packet probability, `switchd` calculates the headroom reservation required for the lossless priority group.