Hi Anoop,
Normally, it is. While Tenant Systems connect to NVE through IP routing network
or MPLS forwarding network, it is not.
Best Regards,
Xiao Min
原始邮件
发件人:AnoopGhanwani <an...@alumni.duke.edu>
收件人:肖敏10093570;
抄送人:draft-ietf-bfd-vx...@ietf.org <draft-ietf-bfd-vx...@ietf.org>;nvo3@ietf.org
<nvo3@ietf.org>;rtg-bfd WG <rtg-...@ietf.org>;
日 期 :2019年10月10日 05:33
主 题 :Re: [nvo3] BFD over VXLAN: Trapping BFD Control packet at VTEP
Hi Xiao Min,
Normally, I think of a VNI as a broadcast domain. The only way I can make
sense of the picture below is to have a separate VNI for each MPLS interface on
the NVE.
Anoop
On Tue, Oct 8, 2019 at 11:09 PM <xiao.m...@zte.com.cn> wrote:
Hi Anoop,
In this use case there is no forwarding happens between the MPLS and non-MPLS
parts, would this use case be prohibited?
If the answer is yes, then I agree that all Tenant Systems attached to a common
NVE MUST share a VAP so long as they connect to the same VN, although in
RFC8014 it uses "can" but not "MUST". As a result, we should not allow multiple
BFD sessions for the same VNI between two NVEs.
If the answer is no, then we should allow multiple BFD sessions for the same
VNI between two NVEs. I personally lean to this answer.
Best Regards,
Xiao Min
原始邮件
发件人:AnoopGhanwani <an...@alumni.duke.edu>
收件人:肖敏10093570;
抄送人:Greg Mirsky <gregimir...@gmail.com>;did...@gmail.com
<did...@gmail.com>;draft-ietf-bfd-vx...@ietf.org
<draft-ietf-bfd-vx...@ietf.org>;nvo3@ietf.org
<nvo3@ietf.org>;santosh.pallaga...@gmail.com
<santosh.pallaga...@gmail.com>;rtg-bfd WG <rtg-...@ietf.org>;Joel M. Halpern
<j...@joelhalpern.com>;tsrid...@vmware.com <tsrid...@vmware.com>;
日 期 :2019年10月09日 06:28
主 题 :Re: [nvo3] BFD over VXLAN: Trapping BFD Control packet at VTEP
Hi Xiao Min,
The picture doesn't have enough information to explain why they are in the same
VNI, and exactly how forwarding happens between the MPLS and non-MPLS parts.
Anoop
On Tue, Oct 8, 2019 at 12:31 AM <xiao.m...@zte.com.cn> wrote:
Hi Anoop,
I don't know such a draft that describes MPLS over Geneve, but I believe the
following figure derived from figure 1 of RFC8014 would help, in the following
figure Tenant System1, Tenant System2, Tenant System3 and Tenant System4 are
assumed belonging to the same VNI, so two BFD sessions for the same VNI need to
be run between NVE1 and NVE2.
+--------+
+----| Tenant |
( ' ) | System1|
................ ( MPLS ) +--------+
. . +--+-+ ( _ )
. .--|NVE1|---+
. . | |
. . +--+-+
. . |
. L3 Overlay . ( ' )
. Network . (Ethernet)
. . ( _ )
. . |
................ +--------+
| | Tenant |
+----+ | System2|
|NVE2| +--------+
| |--------+
+----+ |
| |
( ' ) ( ' )
( MPLS ) (Ethernet)
( _ ) ( _ )
| |
+--------+ +--------+
| Tenant | | Tenant |
| System3| | System4|
+--------+ +--------+
Best Regards,
Xiao Min
原始邮件
发件人:AnoopGhanwani <an...@alumni.duke.edu>
收件人:肖敏10093570;
抄送人:Greg Mirsky <gregimir...@gmail.com>;did...@gmail.com
<did...@gmail.com>;draft-ietf-bfd-vx...@ietf.org
<draft-ietf-bfd-vx...@ietf.org>;nvo3@ietf.org
<nvo3@ietf.org>;santosh.pallaga...@gmail.com
<santosh.pallaga...@gmail.com>;rtg-bfd WG <rtg-...@ietf.org>;Joel M. Halpern
<j...@joelhalpern.com>;tsrid...@vmware.com <tsrid...@vmware.com>;
日 期 :2019年10月08日 12:15
主 题 :Re: [nvo3] BFD over VXLAN: Trapping BFD Control packet at VTEP
Hi Xiao Min,
Is there a draft that describes MPLS over Geneve? It sounds like the NVE is an
MPLS router in this case and if you're using the same VNI as you switch MPLS,
then it's a one-armed router. That doesn't change how BFD needs to be run
between NVEs.
Anoop
On Mon, Oct 7, 2019 at 7:28 PM <xiao.m...@zte.com.cn> wrote:
Hi Anoop,
Sorry for the late response, I just come back from vacation.
The use case is that the network between the VM and the NVE is an MPLS network,
within which the packet is forwarded basing on MPLS label, but not Ethernet MAC
address and/or 802.1Q VLAN. When two such kind of MPLS networks need to
communicate with each other, through a Geneve tunnel, the encap I illustrated
would be used.
Best Regards,
Xiao Min
原始邮件
发件人:AnoopGhanwani <an...@alumni.duke.edu>
收件人:肖敏10093570;
抄送人:Greg Mirsky <gregimir...@gmail.com>;did...@gmail.com
<did...@gmail.com>;draft-ietf-bfd-vx...@ietf.org
<draft-ietf-bfd-vx...@ietf.org>;nvo3@ietf.org
<nvo3@ietf.org>;santosh.pallaga...@gmail.com
<santosh.pallaga...@gmail.com>;rtg-bfd WG <rtg-...@ietf.org>;Joel M. Halpern
<j...@joelhalpern.com>;tsrid...@vmware.com <tsrid...@vmware.com>;
日 期 :2019年09月28日 05:36
主 题 :Re: [nvo3] BFD over VXLAN: Trapping BFD Control packet at VTEP
Hi Xiao Min,
Thanks for the details about the encap but the use case is not clear. It might
help if you explain why its necessary to map a physical Ethernet port and/or
802.1Q VLAN to the same VNI as an MPLS packet without an L2 header.
Thanks,
Anoop
On Thu, Sep 26, 2019 at 7:50 PM <xiao.m...@zte.com.cn> wrote:
Hi Anoop,
Due to the fact that a variety of Tunnels could be used under the NVO3
architecture, as an example, below figure illustrates the format of MPLS packet
over Geneve Tunnel.
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Outer Ethernet Header ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Outer IPvX Header ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Outer UDP Header ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Geneve Header ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+<-+
| | |
~ MPLS Label Stack ~ M
| | P
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ L
| | S
| |
~ Payload ~ P
| | K
| | T
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+<-+
| FCS |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Note that in NVO3 working group Greg and I have submitted an individual draft
draft-xiao-nvo3-bfd-geneve, which is used to address BFD over Geneve.
The intention is to make the two drafts draft-ietf-bfd-vxlan and
draft-xiao-nvo3-bfd-geneve aligned, that is to say, we try to define the
identical mechanism for the common part of BFD over VxLAN Tunnel and BFD over
Geneve Tunnel. For the common part, draft-xiao-nvo3-bfd-geneve would reference
to draft-ietf-bfd-vxlan, and for the other part specific to Geneve, we'll
define the specific mechanism in draft-xiao-nvo3-bfd-geneve.
Hope that clarifies.
Best Regards,
Xiao Min
原始邮件
发件人:AnoopGhanwani <an...@alumni.duke.edu>
收件人:肖敏10093570;
抄送人:Greg Mirsky <gregimir...@gmail.com>;did...@gmail.com
<did...@gmail.com>;draft-ietf-bfd-vx...@ietf.org
<draft-ietf-bfd-vx...@ietf.org>;nvo3@ietf.org
<nvo3@ietf.org>;santosh.pallaga...@gmail.com
<santosh.pallaga...@gmail.com>;rtg-bfd WG <rtg-...@ietf.org>;Joel M. Halpern
<j...@joelhalpern.com>;tsrid...@vmware.com
<tsrid...@vmware.com>;bfd-cha...@ietf.org <bfd-cha...@ietf.org>;
日 期 :2019年09月26日 23:16
主 题 :Re: [nvo3] BFD over VXLAN: Trapping BFD Control packet at VTEP
Hi Xiao Min,
I think we would need more detail around the use case below. What does the
MPLS packet over Tunnel look like?
Thanks,
Anoop
On Wed, Sep 25, 2019 at 11:37 PM <xiao.m...@zte.com.cn> wrote:
Hi Anoop,
Thanks for your comments.
Considering a scenario where TS1 has an MPLS access (i.e. MPLS-Packet over
Tunnel between NVEs) to VNI1, TS3 has an Ethernet access (i.e. MAC-Frame over
Tunnel between NVEs) to VNI1, then how can TS1 and TS3 share one VAP?
Best Regards,
Xiao Min
原始邮件
发件人:AnoopGhanwani <an...@alumni.duke.edu>
收件人:肖敏10093570;
抄送人:Greg Mirsky <gregimir...@gmail.com>;did...@gmail.com
<did...@gmail.com>;draft-ietf-bfd-vx...@ietf.org
<draft-ietf-bfd-vx...@ietf.org>;nvo3@ietf.org
<nvo3@ietf.org>;santosh.pallaga...@gmail.com
<santosh.pallaga...@gmail.com>;rtg-bfd WG <rtg-...@ietf.org>;Joel M. Halpern
<j...@joelhalpern.com>;tsrid...@vmware.com
<tsrid...@vmware.com>;bfd-cha...@ietf.org <bfd-cha...@ietf.org>;
日 期 :2019年09月26日 08:36
主 题 :Re: [nvo3] BFD over VXLAN: Trapping BFD Control packet at VTEP
_______________________________________________
nvo3 mailing list
nvo3@ietf.org
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>>>
Some people may argue that all Tenant Systems connecting to the same Virtual
Network MUST share one VAP, if that's true, then VAP1 and VAP3 should merge
into one VAP and my explanation doesn't work. Copying to NVO3 WG to involve
more experts, hope for your clarifications and comments.
>>>
I would be one of those that would argue that they MUST share on VAP if they
connect to the same Virtual Network. IMO, the NVO3 arch doc should have been
clearer about this.
Thanks,
Anoop
On Tue, Sep 24, 2019 at 7:40 PM <xiao.m...@zte.com.cn> wrote:
Hi Santosh,
With regard to the question whether we should allow multiple BFD sessions for
the same VNI or not, IMHO we should allow it, more explanation as follows...
Below is a figure derived from figure 2 of RFC8014 (An Architecture for
Data-Center Network Virtualization over Layer 3 (NVO3)).
| Data Center Network (IP) |
| |
+-----------------------------------------+
| |
| Tunnel Overlay |
+------------+---------+ +---------+------------+
| +----------+-------+ | | +-------+----------+ |
| | Overlay Module | | | | Overlay Module | |
| +---------+--------+ | | +---------+--------+ |
| | | | | |
NVE1 | | | | | | NVE2
| +--------+-------+ | | +--------+-------+ |
| |VNI1 VNI2 VNI1 | | | | VNI1 VNI2 VNI1 | |
| +-+-----+----+---+ | | +-+-----+-----+--+ |
|VAP1| VAP2| | VAP3 | |VAP1| VAP2| | VAP3|
+----+-----+----+------+ +----+-----+-----+-----+
| | | | | |
| | | | | |
| | | | | |
-------+-----+----+-------------------+-----+-----+-------
| | | Tenant | | |
TSI1 | TSI2| | TSI3 TSI1| TSI2| |TSI3
+---+ +---+ +---+ +---+ +---+ +---+
|TS1| |TS2| |TS3| |TS4| |TS5| |TS6|
+---+ +---+ +---+ +---+ +---+ +---+
To my understanding, the BFD sessions between NVE1 and NVE2 are actually
initiated and terminated at VAP of NVE.
If the network operator want to set up one BFD session between VAP1 of NVE1 and
VAP1of NVE2, at the same time another BFD session between VAP3 of NVE1 and VAP3
of NVE2, although the two BFD sessions are for the same VNI1, I believe it's
reasonable, so that's why I think we should allow it.
Of course, in RFC8014 it also says:
"Note that two different Tenant Systems (and TSIs) attached to a common NVE can
share a VAP (e.g., TS1 and TS2 in Figure 2) so long as they connect to the same
Virtual Network."
Some people may argue that all Tenant Systems connecting to the same Virtual
Network MUST share one VAP, if that's true, then VAP1 and VAP3 should merge
into one VAP and my explanation doesn't work. Copying to NVO3 WG to involve
more experts, hope for your clarifications and comments.
Best Regards,
Xiao Min
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nvo3 mailing list
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https://www.ietf.org/mailman/listinfo/nvo3
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