SRv6 BE vs SRv6 TE

SRv6 (Segment Routing with IPv6) is an extension to IPv6 that allows for flexible and efficient traffic engineering in computer networks. It enables the creation of source-based routing paths using IPv6 addresses as segment identifiers.

SRv6 BE (SRv6 Bounded Encapsulation) and SRv6 TE (SRv6 Traffic Engineering) are two different approaches to implementing traffic engineering within an SRv6 network. Here's a brief explanation of each:

SRv6 BE (SRv6 Bounded Encapsulation): In SRv6 BE, traffic engineering is achieved by encapsulating packets within an SRv6 header. This encapsulation allows for the explicit specification of the path that the packet should follow. The SRv6 header contains a list of segments, representing the network nodes that the packet should traverse in order. The packet is then encapsulated with this header and forwarded along the specified path. Each network node removes the corresponding segment from the header and forwards the packet to the next node based on the remaining segments until it reaches its destination.
SRv6 BE provides explicit control over the path of traffic and allows for deterministic routing. It is suitable for scenarios where precise path control is required, such as in service function chaining or specific network traffic optimization.

SRv6 TE (SRv6 Traffic Engineering): SRv6 TE focuses on achieving traffic engineering objectives within an SRv6 network without the need for explicit path specification in every packet. Instead, it relies on steering packets based on certain traffic engineering policies or constraints defined at the network level. These policies can be related to metrics like latency, bandwidth, or load balancing.
SRv6 TE leverages the network's topology and the information gathered from network devices to dynamically route traffic along the most optimal paths. It offers more flexibility and scalability compared to SRv6 BE as it allows for automatic traffic optimization without requiring per-packet encapsulation.

The choice between SRv6 BE and SRv6 TE depends on the specific requirements of the network and the desired level of control. SRv6 BE offers granular control over the path of each packet but may introduce additional overhead due to encapsulation. SRv6 TE, on the other hand, provides a more automated and scalable approach to traffic engineering, although with less explicit path control.

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