Hello @dundient
1. What is the purpose of the of bandwidth command in each case? And how can I use them?
The bandwidth command in the context of Segment Routing Traffic Engineering (SR-TE) on-demand policies is used to define the bandwidth constraints for a specific candidate path. This is part of the Traffic Engineering (TE) mechanism, where the network can dynamically select paths based on available resources and constraints.
- Purpose: The
bandwidth command specifies the minimum bandwidth requirement for a path to be considered valid. The SR-TE controller (or headend router) will evaluate the available bandwidth on the links along the candidate path and only select paths that meet the specified bandwidth constraint.
2. Is it possible to make a route, for example, BANDWIDTH_1 list takes a primary route with the 5000 bandwidth and after full utilization it goes through BANDWIDTH_2 list?
2. The behavior you're describing is not directly achievable with the configuration as it stands. Here's why:
- The
bandwidth constraint in SR-TE on-demand policies is not a dynamic load-balancing mechanism. It does not monitor the actual utilization of the path in real-time. Instead, it evaluates the available bandwidth on the links (as advertised by IGP extensions like OSPF-TE or IS-IS-TE) when selecting a path.
- Once a path is selected, the router will continue to use that path until a re-evaluation is triggered (e.g., due to a topology change or a failure).
However, you can achieve a similar behavior by using multiple candidate paths with different preferences and bandwidth constraints, as you have configured.
Let me know if you need more detailed analysis of this.
Hope This Helps!!!
AshSe
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