Egress Traffic Steering Controller for Network Path Optimization
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Solution Overview
Problem
Existing distributed platforms face performance degradation and increased costs due to unbalanced utilization of network paths with varying performance and cost characteristics, as existing routing approaches fail to account for real-time changes in network and system conditions.
Innovation Solution
A controller dynamically shifts egress traffic across different paths based on real-time network and system conditions, monitoring metrics from routers and nodes to optimize performance and cost by selectively routing traffic through the most suitable paths, using feedback loops and granular traffic shifting mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If routers select one particular path as optimal for egress traffic, then routing simplicity is maintained, but path utilization becomes unbalanced leading to degraded performance
Solution Approach 1:
The system dynamically adjusts path selection for egress traffic based on real-time monitoring of network conditions and performance metrics. Instead of statically designating one optimal path, the controller continuously evaluates multiple paths and redistributes traffic to prevent any single path from becoming overloaded, thereby maintaining both routing simplicity and performance reliability
Solution Approach 2:
The system implements a feedback mechanism where the controller monitors network conditions and performance metrics from multiple paths, then uses this information to adjust traffic distribution. This closed-loop control ensures that path utilization remains balanced and performance is maintained while keeping the routing logic centralized and simple
2Productivity
If multiple paths are used for egress traffic, then path utilization improves, but routing complexity increases
Solution Approach 1:
The system introduces a centralized controller as an intermediary that manages path selection and traffic distribution. This controller receives performance data from multiple paths and makes intelligent routing decisions, allowing the network to utilize multiple paths effectively while keeping routing logic centralized and manageable rather than distributed and complex
Solution Approach 2:
The controller performs multiple functions including monitoring network conditions, evaluating path performance, making routing decisions, and adjusting traffic distribution. This multi-functional approach consolidates routing complexity into a single entity that can efficiently manage multiple paths without increasing overall system complexity
3Stability of the object's composition
If configured routes are used for egress traffic, then routing stability is maintained, but adaptability to changing network conditions deteriorates
Solution Approach 1:
The system transitions from static configured routes to dynamic path selection that adapts to changing network conditions. The controller continuously monitors performance metrics and adjusts traffic distribution in real-time, maintaining routing stability through controlled adaptation rather than rigid configuration
Solution Approach 2:
The system implements feedback loops that monitor network conditions and performance metrics, then use this information to adjust routing decisions. This allows the system to maintain stability through gradual, controlled changes while adapting to evolving network conditions, balancing both stability and adaptability
Data Source
AI summary
A controller may identify a problematic path from several paths over which to route egress traffic from a site, may determine a threshold amount of traffic to shift from the problematic path, and may implement different potential traffic shifts for shifting similar amounts of traffic as the threshold amount. The controller may provide the labels or header values that different nodes in the site may place in the egress traffic in order to control which path is used to distributed that egress traffic. The controller may modify routing policies affecting different Autonomous System numbers, address prefixes, or other routing parameters to select and/or shift egress traffic, that is associated with those routing parameters and that is about equal to the threshold amount of traffic, from the problematic path to a different path.