Forwarding Group in OVN

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Presentation transcript:

Forwarding Group in OVN Manoj Sharma Nutanix Inc.

Use case External Routers Underlay Network

OVN Logical Topology Configure FWD_GROUP (VIP, VMAC, lsp1..lspn) Route table IPv4 Routes 0.0.0.0/0 VIP Underlay Network VM1 External Routers VM2 Logical Router Logical Switch table=13 (ls_in_l2_lkup ) match=(eth.dst == VMAC), action=(fwd_group("lsp1".."lspn");)

Datapath ARP Request (VIP) ARP Reply (VMAC) Data Traffic Underlay Network VM1 External Routers VM2 Logical Router Logical Switch dl_dst=VMAC actions=group:1 group_id=1, type=select,selection_method=dp_hash, bucket=actions=load:0x2->NXM_NX_REG15, resubmit(,32), bucket=actions=load:0x3->NXM_NX_REG15, resubmit(,32)

Liveness Detection BFD dl_dst=VMAC actions=group:1 Underlay Network External Routers Hypervisor dl_dst=VMAC actions=group:1 group_id=1, type=select,selection_method=dp_hash, bucket=watch_port:31, actions=load:0x2->NXM_NX_REG15, resubmit(,32), bucket=watch_port:32,actions=load:0x3->NXM_NX_REG15, resubmit(,32)

Summary Convergence time depends on BFD timer settings alone Repair done locally, without control plane involvement How to avoid openflow port in the liveness detection?

Thank you!