Adding rule for for MTU validations

[juarocha]

Related Issue(s)

Solves #470

Related Collection Role

• cisco.nac_dc_vxlan.validate
• cisco.nac_dc_vxlan.dtc.create
• cisco.nac_dc_vxlan.dtc.deploy
• cisco.nac_dc_vxlan.dtc.remove
• other

Related Data Model Element

• vxlan.fabric
• vxlan.global
• vxlan.topology
• vxlan.underlay
• vxlan.overlay
• vxlan.overlay_extensions
• vxlan.policy
• vxlan.multisite
• defaults.vxlan
• other

Proposed Changes

Validation script for:

• Fabric interfaces MTU : accepted value must be an even number in the range 1550 and 9216. minimum should be 1550 due to VXLAN header (Fragmentation is not supported).
• L2 interfaces MTU: accepted values are 1500, 9216, default(1500) and jumbo(as defined on global value: ). Value must be can be either default or jumbo.
• L3 interfaces MTU: accepted value must be an even number in the range 1500 and 9216.
• Global values:
  • layer2_host_interface_mtu: accepted value must be an even number in the range 1550 and 9216 and 'default'(1500)
  • Sub interface MTU must be lower/equal than the parent interface

Test Notes

NA

Cisco NDFC Version

12.2.3

Checklist

• Latest commit is rebased from develop with merge conflicts resolved
• New or updates to documentation has been made accordingly
• Assigned the proper reviewers

[juburnet]

@juarocha - I approved the sanity checks to run and there were a few errors found. Please review https://github.com/netascode/ansible-dc-vxlan/actions/runs/16636032225/job/47081860486?pr=501 and make the necessary commits with corrections. Let us know if you have any questions.

[juburnet]

All sanity checks are passing now. Ready for review.