Segment Routing Application Design

Segment Routing Group Handling:

• SR Application

• SRGroupKey data model
  

• Default Group Handler & Recovery

• During Start-up:

• Create Segment Id database of all the nodes in the network

• Get all devices from Topology service

• Add to above list when DEVICE_ADDED event received

• For each switch that this instance is master,

• If the Group subsystem peforming Group AUDIT, then wait until AUDIT completes

• Create Neighbor list

• Get all outgoing links from Link service

• Update above list when LINK_ADDED event received

• Get all Groups from the Store

• Perform Audit using above Neighbor list

• Policy Group Handler & Recovery

• While creating the tunnel, ensure all the stitched groups are created before creating the Group chain in the ingress router

• Similarly, while deleting the tunnel, ensure the group is deleted at ingress router before deleting any stitched groups

• Group Event Handling