SD-WAN and Traffic Shaping with Meraki


SD-WAN and Traffic Shaping with Meraki

Understanding SD-WAN Interfaces

When diving into the SD-WAN setup, the first thing to understand is the interfaces you're working with:

  • For most devices, you'll see multiple interfaces, typically named sd-wan and traffic JP.
  • On smaller MX devices, like the 6 to 74, you might see only one LAN interface. In such cases, a specific setting needs attention:
  • Navigate to the uplinks section.
  • Use the option to convert port two into port one if required.

Setting the Bandwidth

Bandwidth specification is essential to ensure smooth network operations:

  • The bandwidth can be defined for each interface; for instance, 100 meg for each.
  • Cyberger is not a factor in this context.
  • Within this section, one can specify uplink statistics and even add a secondary uplink for redundancy.

Load Balancing and Flow Preference

Load balancing is crucial for maximizing network efficiency and throughput. Here's how to manage it:

  • Specify the primary uplink.
  • Define flow preferences for internet transit. This can be viewed as a policy-based routing mechanism.
  • As an example, you can set specific uplinks for various traffic sources and destinations.

Prioritizing Traffic: Voice, Video, and Music

Traffic prioritization ensures crucial data gets the bandwidth it needs:

  • For instance, voice traffic might be routed over one MPLS WAN while video is sent via another.
  • You can set rules such that voice, video conferences, and music use the best available link.

Performance Classes and Traffic Policies

Meraki provides flexibility in defining performance classes and policies:

  • Performance classes define the expected quality for certain traffic types.
  • For instance, you might set strict performance metrics for voice traffic but allow more leniency for general internet browsing.
  • Custom expressions allow for even more granularity. For example:
  • TCP traffic going to server on port 443 can have its own dedicated policy.

Traffic Shaping and Bandwidth Limits

Traffic shaping is a way to manage bandwidth allocation actively:

  • You can enable or disable default shaping rules.
  • Specific limits can be set on certain types of traffic, like file sharing.
  • Differentiated services code point (DSCP) markings can be left unchanged or be adjusted as needed.
  • Detailed settings let you control uplink and download speeds for specific traffic types.

Closing Thoughts

Meraki's SD-WAN and traffic shaping tools are designed to be user-friendly and offer robust network management capabilities. Properly setting these options ensures a responsive and efficient network that meets the needs of various data types and applications. Future exploration might delve deeper into Meraki's firewall settings.

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