Hi Shuping In the DC model the SRv6 SR-TE tenant overlay coloring provides the underpinning to the discrete underlay path being instantiated by SRv6 based on the coloring provided by the metadata encoded in the APP ID in the NVO3 overlay encapsulation injected at the leaf via local policy.
We are basically applying the network slicing concept to the Data Center NVO3 fabric overlay signaled by the APN APP ID. I just made that up ..but my guess is that is how it would work. Kind Regards Gyan On Wed, Mar 31, 2021 at 1:11 AM Gyan Mishra <[email protected]> wrote: > > Hi Shuping > > My thoughts were that in any Data Center NVO3 environment the APN ID can > be introduced by the host or in this case can be injected with a policy as > metadata into the NVO3 overlay GENEVE or VXLN-GPE at the leaf tunnel > endpoint that does the encapsulation / decapsulation of the overlay > header. The App ID encoded as metadata into a Group policy ID shim header > for VXLAN-GPE and for GENEVE in the data plane extensibility in TLV options > format for future innovations such as APN. > > The APP ID would provide the signaling for fine grain network treatment > and mapping to SRv6 SR-TE color mapping instantiation to achieve the > desired application network treatment QOE. > > Kind Regards > > Gyan > > > On Tue, Mar 30, 2021 at 10:55 PM Pengshuping (Peng Shuping) < > [email protected]> wrote: > >> Hi Gyan, >> >> Thank you for this information. I agree with your following statements. >> >> "You can see some similarities between the two NVO3 overlays GENEVE and >> VXLAN-GPE both having the ability carry metadata and so would be perfect >> for DC environment to carry APN ID in the metadata field for the endpoint >> characteristics signaling to the network." >> >> Any concrete use cases that could potentially use APN ID with either >> VxLAN-GPE or GENEVE? >> >> I also copied NOV3. Hope experts could help here. Thank you! >> >> Best reards, >> Shuping >> >> >> >> -----Original Message----- >> From: Gyan Mishra [mailto:[email protected]] >> Sent: Monday, March 29, 2021 4:54 PM >> To: Pengshuping (Peng Shuping) <[email protected]> >> Cc: Linda Dunbar <[email protected]>; [email protected]; >> [email protected] >> Subject: Re: [Apn] should add the gap analysis for GENEVE (RFC8926) >> >> Hi Shuping >> >> This is in similar context to use of VXLAN-GPE to carry APN APP ID >> marking information >> >> https://datatracker.ietf.org/doc/html/draft-ietf-nvo3-vxlan-gpe-11 >> >> >> The capabilities of the VXLAN-GPE protocol can be extended by >> defining next protocol "shim" headers that are used to implement new >> data plane functions. For example, Group-Based Policy (GBP) or In- >> situ Operations, Administration, and Maintenance (IOAM) metadata >> functionalities can be added as specified in >> [I-D.lemon-vxlan-lisp-gpe-gbp >> < >> https://datatracker.ietf.org/doc/html/draft-ietf-nvo3-vxlan-gpe-11#ref-I-D.lemon-vxlan-lisp-gpe-gbp >> >] >> and >> [I-D.brockners-ippm-ioam-vxlan-gpe >> < >> https://datatracker.ietf.org/doc/html/draft-ietf-nvo3-vxlan-gpe-11#ref-I-D.brockners-ippm-ioam-vxlan-gpe >> >]. >> >> >> GENEVE >> >> https://tools.ietf.org/html/rfc8926 >> >> Work such as "VL2: A Scalable and Flexible Data Center Network" [VL2 < >> https://tools.ietf.org/html/rfc8926#ref-VL2>] >> and "NVO3 Data Plane Requirements" [NVO3-DATAPLANE < >> https://tools.ietf.org/html/rfc8926#ref-NVO3-DATAPLANE>] have described >> some of the properties that the data plane must have to support >> network virtualization. However, one additional defining requirement >> is the need to carry metadata (e.g., system state) along with the >> packet data; example use cases of metadata are noted below. The use >> of some metadata is certainly not a foreign concept -- nearly all >> protocols used for network virtualization have at least 24 bits of >> identifier space as a way to partition between tenants. This is >> often described as overcoming the limits of 12-bit VLANs; when seen >> in that context or any context where it is a true tenant identifier, >> 16 million possible entries is a large number. However, the reality >> is that the metadata is not exclusively used to identify tenants, and >> encoding other information quickly starts to crowd the space. In >> fact, when compared to the tags used to exchange metadata between >> line cards on a chassis switch, 24-bit identifiers start to look >> quite small. There are nearly endless uses for this metadata, >> ranging from storing input port identifiers for simple security >> policies to sending service-based context for advanced middlebox >> applications that terminate and re-encapsulate Geneve traffic. >> >> >> >> You can see some similarities between the two NVO3 overlays GENEVE and >> VXLAN-GPE both having the ability carry metadata and so would be perfect >> for DC environment to carry APN ID in the metadata field for the endpoint >> characteristics signaling to the network. >> >> Kind Regards >> >> >> Gyan >> >> On Tue, Mar 23, 2021 at 10:26 PM Pengshuping (Peng Shuping) < >> [email protected]> wrote: >> >> > Thank you, Linda! >> > >> > >> > >> > When we start exploring the solution using GENEVE, we would need to >> > know more about the use cases. Thank you for the information! >> > >> > >> > >> > BR, >> > >> > Shuping >> > >> > >> > >> > *From:* Linda Dunbar [mailto:[email protected]] >> > *Sent:* Tuesday, March 23, 2021 11:16 AM >> > *To:* Pengshuping (Peng Shuping) <[email protected]>; >> > [email protected]; [email protected] >> > *Subject:* RE: should add the gap analysis for GENEVE (RFC8926) >> > >> > >> > >> > Shuping, >> > >> > >> > >> > Here is one example: for 5G Edge Computing, the edge devices have >> > limited capacity. It can use GENEVE to carry information about the >> > characteristics of the App, such as Types, Edge device information, etc. >> > >> > Linda >> > >> > >> > >> > >> > >> > *From:* Pengshuping (Peng Shuping) <[email protected]> >> > *Sent:* Sunday, March 21, 2021 8:39 PM >> > *To:* Linda Dunbar <[email protected]>; >> > [email protected]; [email protected] >> > *Subject:* RE: should add the gap analysis for GENEVE (RFC8926) >> > >> > >> > >> > Hi Linda, >> > >> > >> > >> > I was wondering about the concrete usage scenarios since I am not >> > familiar with those with GENEVE. For example, in what scenario >> > carrying what information to do what? >> > >> > >> > >> > Any references on the IoT case you mentioned about? >> > >> > >> > >> > Thank you! >> > >> > >> > >> > Best regards, >> > >> > Shuping >> > >> > >> > >> > *From:* Linda Dunbar [mailto:[email protected] >> > <[email protected]>] >> > *Sent:* Saturday, March 20, 2021 11:31 AM >> > *To:* Pengshuping (Peng Shuping) <[email protected]>; >> > [email protected]; [email protected] >> > *Subject:* RE: should add the gap analysis for GENEVE (RFC8926) >> > >> > >> > >> > ShuPing, >> > >> > >> > >> > GENEVE is to carry metadata associated with the packet. Metadata can >> > be location information, compute information, service ID, App category, >> etc. >> > -- > > <http://www.verizon.com/> > > *Gyan Mishra* > > *Network Solutions A**rchitect * > > *Email [email protected] <[email protected]>* > > > > *M 301 502-1347* > > -- <http://www.verizon.com/> *Gyan Mishra* *Network Solutions A**rchitect * *Email [email protected] <[email protected]>* *M 301 502-1347*
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