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Dell Networking Layer 3 Leaf-Spine Deployment and Best Practices with OS10 release 10.5.3.0.44
Introduction Hardware overview Leaf-spine overview Protocols in the leaf-spine example Layer 3 configuration planning
BGP ASN configuration
IP addressing
Loopback address
Point-to-point addresses
Layer 3 with Dell leaf and spine switches OSPF and eBGP Alternate use case scenario Demonstration Appendix A

BGP ASN configuration

Home > Networking Solutions > Enterprise/Data Center Networking Solutions > SmartFabric OS10 Networking Solutions > Guides > Dell Networking Layer 3 Leaf-Spine Deployment and Best Practices with OS10 release 10.5.3.0.44 > BGP ASN configuration

BGP ASN configuration

  • When eBGP is used, an autonomous system number (ASN) is assigned to each switch.   Valid private, 2-byte ASNs range from 64512 through 65534. Figure 10 shows the ASN assignments used for leaf and spine switches in the BGP examples in this guide.  

    Figure 10.    BGP ASN assignments if using the eBGP  

    ASNs should follow a logical pattern for ease of administration and allow for growth as additional leaf and spine switches are added. In this example, an ASN with a "6" in the hundreds place represents a spine switch (64601) and an ASN with a "7" in the hundreds place represents a leaf switch (64701).

    Note: The same ASN can be used across all tier-2 spine switches if the growth plans do not require an additional layer of spine switches.