EVPN VXLAN Port Mirroring with Direct Analyzer Forwarding
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Solution Overview
Problem
Existing port mirroring in EVPN VXLAN networks leads to traffic congestion and bandwidth consumption due to packets being flooded to all devices in the VLAN, rather than being forwarded efficiently to the analyzer.
Innovation Solution
Configure devices as mirror root and mirror leaf devices to send packets directly to the analyzer via point-to-point connections using extended routing messages, reducing unnecessary flooding and optimizing bandwidth usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packets are flooded to all devices in the VLAN for port mirroring, then all devices can receive mirrored packets, but traffic congestion and bandwidth consumption increase
Solution Approach 1:
The patent extracts the unnecessary flooding of mirrored packets to devices that do not need them. By using extended routing messages to identify mirror root devices, the system removes redundant packet transmissions to non-analyzer devices, reducing bandwidth consumption while maintaining reliable port mirroring functionality.
Solution Approach 2:
The patent introduces extended routing messages as an intermediary mechanism to carry mirror root information. These messages enable devices to identify which packets should be mirrored to the analyzer, allowing selective forwarding without flooding all packets to all devices, thus reducing unnecessary bandwidth usage.
2Ease of operation
If packets are flooded to all devices in the VLAN, then port mirroring can be implemented, but traffic congestion increases
Solution Approach 1:
The patent applies local quality by differentiating the treatment of packets based on destination. Instead of uniform flooding to all devices, the system uses extended routing messages to identify mirror root devices and forwards mirrored packets only to those specific devices, reducing traffic congestion while maintaining ease of port mirroring implementation.
3Loss of energy
If extended routing messages are used to identify mirror root devices, then bandwidth consumption is reduced, but device complexity increases
Solution Approach 1:
The patent makes extended routing messages universal by integrating them into the existing EVPN VXLAN routing infrastructure. These messages serve multiple functions: identifying mirror root devices, enabling selective packet forwarding, and reducing bandwidth consumption, thereby achieving multiple benefits without proportionally increasing device complexity.
Data Source
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AI summary
This disclosure describes techniques for improved port mirroring over Ethernet Virtual Private Network (EVPN) Virtual extensible Local Area Network (VXLAN). For example, a method includes receiving, by a first network device of a plurality of network devices of a leaf and spine network configured with an Ethernet Virtual Private Network and from a second network device of the plurality of network devices, an extended routing message including information indicating the second network device is connected to an analyzer, and wherein the plurality of network devices is configured with a Virtual Local Area Network (VLAN) for which the analyzer is configured to analyze packets. The method also includes configuring, within forwarding information of the first network device and in response to receiving the extended routing message advertised by the second network device, a next hop that specifies packets associated with the VLAN are to be forwarded to the second network device.