> On Mar 1, 2017, at 7:27 PM, Anoop Ghanwani <an...@alumni.duke.edu> wrote: > > On Wed, Mar 1, 2017 at 9:21 AM, Stefano Previdi (sprevidi) > <sprev...@cisco.com> wrote: > > > On Mar 1, 2017, at 5:48 PM, Anoop Ghanwani <an...@alumni.duke.edu> wrote: > > > > Thanks for the responses. > > > > On Wed, Mar 1, 2017 at 7:44 AM, Stefano Previdi (sprevidi) > > <sprev...@cisco.com> wrote: > > > > > On Feb 28, 2017, at 8:29 PM, Anoop Ghanwani <an...@alumni.duke.edu> wrote: > > > > > > > > > - pg 5, line 1 > > > What is the criteria that allow sharing the AS number? Is there a > > > reference? > > > > > > we changed this to “use the same AS”. As explained in 4.3, using the same > > AS brings the update loop prevention mechanism so facilitate filtering and > > propagation. > > > > > > I think your response is about the spine/leaf nodes. My comment is about > > the ToR nodes. > > > the same applies. The rules and guidelines related to bgp deployment and AS > numbering are the same. > > > In this draft, we have: > >>> > For efficient usage of the scarce 2-byte Private Use AS pool, > different Tier-3 nodes might share the same AS. > > >>> > > In RFC 7938, we have: > >>> > A unique ASN is allocated to every Tier 3 device (e.g., ToR) in > this topology. > > >>> > > What I am asking for is clarification on how different Tier-3 nodes might > share the same AS number.
“share” is the wrong term and we agreed to change it. Btw, RFC7938 section 5.2.2. "Private Use ASNs” says: The original range of Private Use ASNs [RFC6996] limited operators to 1023 unique ASNs. Since it is quite likely that the number of network devices may exceed this number, a workaround is required. One approach is to re-use the ASNs assigned to the Tier 3 devices across different clusters. For example, Private Use ASNs 65001, 65002 ... 65032 could be used within every individual cluster and assigned to Tier 3 devices. By “share” we intended to “use” the same number in different clusters. s. > > Your comment above (referencing 4.3) is talking about a different scheme > (iBGP) in which case I am assuming all nodes (spine, leaf, tor) share the > same AS number. > > Thanks, > Anoop _______________________________________________ spring mailing list spring@ietf.org https://www.ietf.org/mailman/listinfo/spring
