No Greg, uSID does not bring all the benefits of SRv6 while using
shorter SIDs.
It also violates the basic IP archtiecture really abdly.
Yours,
Joel
On 10/5/2019 7:44 PM, Greg Mirsky wrote:
Hi Gyan,
you're asking very good questions and your arguments are all correct.
But I think that now there are several proposals that address what is
considered the scalability issue of SRv6. Among these is the Unified SID
for SRv6
<https://datatracker.ietf.org/doc/draft-mirsky-6man-unified-id-sr/>.
U-SID benefits from all the advantages SRH provides while adding a
higher density of SIDs thus allowing stricter path control.
Regards,
Greg
On Fri, Oct 4, 2019 at 10:02 PM Gyan Mishra <[email protected]
<mailto:[email protected]>> wrote:
In line possible answers
Sent from my iPhone
On Oct 4, 2019, at 8:22 PM, Gyan Mishra <[email protected]
<mailto:[email protected]>> wrote:
Bess,
What is the benefit of SRv6 over SR-MPLS for greenfield
deployments or existing mpls deployments.
I think I answered my own question but please chime in with your
thoughts..
This NANOG document talks about the state of TE with providers and
currently the big show stopper with SRv6 which removes it off the
table as a possibility is the SID depth and larger packet size given
that customers are set to 9100 and the core is 9216 so when adding
in mpls overhead vpn labels and Ti-LFA EH insertion at PLR node to
PQ node that adding in the entire SID list for long TE paths that
have huge SID depth makes SRv6 not viable at this point.
https://pc.nanog.org/static/published/meetings/NANOG73/1646/20180627_Gray_The_State_Of_v1.pdf
For existing implementations it appears from my research a no
brainer to go with SR-MPLS as that is a painless seamless migration
but SRv6 due to SID depth issues and given limited head room from
customer MTU to the backbone MTU today we are over the limit with
larger SID depth for Ti-LFA paths or non protected paths. Until
that is addressed SRv6 unfortunately may not get much traction with
service providers which I think due to the SRv6 issues ....uSID and
SRv6+ may tend to be more viable and more attractive.
Regards,
Gyan Mishra ____
IT Network Engineering & Technology ____
Verizon Communications Inc. (VZ)____
13101 Columbia Pike
<https://www.google..com/maps/search/13101+Columbia+Pike?entry=gmail&source=g>
FDC1
3rd Floor____
Silver Spring, MD 20904____
United States____
Phone: 301 502-1347 <tel:301%20502-1347>____
Email: [email protected]
<mailto:[email protected]>____
www.linkedin.com/in/GYAN-MISHRA-RS-SP-MPLS-IPV6-EXPERT
<http://www.linkedin.com/in/GYAN-MISHRA-RS-SP-MPLS-IPV6-EXPERT>
Sent from my iPhone
_______________________________________________
BESS mailing list
[email protected] <mailto:[email protected]>
https://www.ietf.org/mailman/listinfo/bess
_______________________________________________
BESS mailing list
[email protected]
https://www.ietf.org/mailman/listinfo/bess
_______________________________________________
BESS mailing list
[email protected]
https://www.ietf.org/mailman/listinfo/bess
