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Merge branch 'final5.17-feedback' into ania-stage
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content/cumulus-linux-517/Layer-1-and-Switch-Ports/Quality-of-Service/_index.md

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### Lossless Headroom Based on Small Packet Probability
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<!--
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{{%notice note%}}
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Lossless headroom based on small packet probability is a Beta feature.
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{{%/notice%}}
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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). 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.
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<!--On Spectrum-6, the switch assumes a 50 percent probability of such packets arriving at line rate.-->
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content/cumulus-linux-517/Whats-New/_index.md

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- {{<link url="Quality-of-Service/#lossless-shared-headroom-pool" text="Lossless shared headroom pool">}}
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- {{<link url="Link-Layer-Discovery-Protocol/#lldp-tlvs" text="Granular LLDP TLV definition and control">}}
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- {{<link url="Syslog/#thermal-control-logs" text="Thermal logging in syslog (sensor and fan state and errors)">}}
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- {{<link url="Quality-of-Service/#lossless-headroom-based-on-small-packet-probability" text="Lossless headroom size based on small packet probability">}}
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- {{<link url="Quality-of-Service/#lossless-headroom-based-on-small-packet-probability" text="Lossless headroom size based on small packet probability">}} (Beta)
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- {{<link url="Quality-of-Service/#dynamic-ecn" text="Dynamic ECN">}} (Beta)
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- {{<link url="Optional-BGP-Configuration/#bgp-lldp-unreachability-in-disjoined-planes" text="BGP-LLDP Unreachability in Disjoined Planes">}} and {{<link url="EVPN-Enhancements/#evpn-unreachability-in-disjoined-planes" text="EVPN Unreachability in Disjoined Planes">}} (Beta)
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- {{<link url="Link-Layer-Discovery-Protocol/#bgp-unreachable-prefix-tlv" text="BGP unreachable prefix TLV">}} (Beta)

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