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EVPN MultiHoming Fast ReRoute for L3VNI-routed traffic - #2332
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Overall, lgtm, To address community review comments before merge. Target for v1.19 |
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Comment from SAI community review: Specify in the document that this is preferred over L3 protection NHG model due to scaling limits of hardware resources related to protection NHG. |
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@tahmed-dev, @r12f, @JaiOCP, @bandaru-viswanath - could you please help complete the review on this PR? |
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SAI community review is done. looks good to me now. |
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@tjchadaga to help with merge |
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@JaiOCP - are you able to review and sign off on this? |
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@manamand2020 - could you please squash your commits? |
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Signed-off-by: Manas Kumar Mandal <manamand@cisco.com>
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Done. |
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Adds SAI support for hardware-driven fast reroute (FRR) of L3VNI-routed traffic to a cross-switch multihomed bridge port, extending the existing software-driven EVPN Multihoming fast-failover mechanism (autonomous ASIC switchover + async NOS notification, instead of NOS-driven SET_SWITCHOVER).
Changes
inc/saibridge.h: sai_bridge_port_protection_mode_t (SOFTWARE/HARDWARE) + SAI_BRIDGE_PORT_ATTR_BRIDGE_PORT_PROTECTION_MODE; sai_bridge_port_protection_state_t + read-only SAI_BRIDGE_PORT_ATTR_BRIDGE_PORT_PROTECTION_STATE; sai_bridge_port_protection_event_t, notification data struct, and callback typedef for HW switchover events.
SAI_BRIDGE_PORT_ATTR_BRIDGE_PORT_PROTECTION_REVERTIVE; control revertive behavior for switchover.
sai_bridge_port_protection_admin_mode_t ( SAI_BRIDGE_PORT_ATTR_BRIDGE_PORT_PROTECTION_MODE); allows NOS to control forced switchover.
inc/saiswitch.h: SAI_SWITCH_ATTR_BRIDGE_PORT_HW_PROTECTION_SWITCHOVER_NOTIFY to register the callback (mirrors the existing next-hop-group HW protection notify attribute).
inc/saitunnel.h: SAI_TUNNEL_ATTR_VXLAN_TUNNEL_MAC — inner DMAC for routed traffic re-encapsulated onto a P2P VXLAN tunnel after switchover.
doc/tunnel/SAI-Proposal-EVPN-Multihoming.md: new §3.2.6 spec, §4.6 workflow, Figure 7 object-model diagram.