Class of Service

Classification and rewrite support at SRv6 encapsulation, transit, and de-encapsulation nodes (ACX7024, ACX7024X, ACX7100-32C, ACX7100-48L, ACX7332, ACX7348, and ACX7509)—You can classify and rewrite SRv6 traffic at encapsulation, transit, and de-encapsulation nodes to enforce CoS marking consistency for Layer 3 VPN (L3VPN) and EVPN traffic. Configure policies to map VLAN priority code point (PCP) and Differentiated Services code point (DSCP)/DSCP-IPv6 code points and to rewrite VLAN tags and IPv6 headers. Policies support reduced and non-reduced modes, segment identifier (SID) depths, micro- or classic SID, dynamic tunnels, penultimate segment pop (PSP) or ultimate segment pop (USP), and Topology Independent Loop-Free Alternate (TI-LFA). You can enable DSCP propagation to copy access-side DSCP into the SRv6 IP header. DSCP propagation disables DSCP, DSCP-IPv6, and inet-precedence rewrite rules. You cannot classify traffic based on inner payload code points at de-encapsulation.

[See Understanding SRv6 Classification and Rewrite.]

CoS support on pseudowire subscriber logical tunnel interfaces (ACX7024, ACX7024X, ACX7100-32C, ACX7100-48L, ACX7332, ACX7348, and ACX7509)—You can enforce QoS on pseudowire subscriber interfaces to shape, prioritize, and mark traffic for L2/L3 VPN services by leveraging logical tunnel-anchored pseudowire client logical interfaces. Apply classifiers and rewrite rules per logical interface, and use hierarchical schedulers and traffic-control profiles on pseudowire logical interfaces or logical interface sets. You can use six priorities and weighted random early detection (WRED). Traffic rates are determined by the recycle bandwidth; use the logical tunnel port shaper to control upstream traffic.

[See CoS Support for Pseudowire Subscriber Logical Tunnel Interfaces.]