1. ISIS Extensions for FlexE Link Advertisement
draft-zhu-ccamp-flexe-link-advertisement-01
Yongqing
Huanan
Mach
Zongpeng Du )

2. History of This Document
draft-zcdc-isis-flexe-extention-00 was published in March 13, 2017
Submitted to ISIS WG, presented in IETF 98th meeting
Two major comments received so far:
This work should be done in CCAMP WG
Moved to CCAMP
Submitted as draft-zhu-ccamp-flexe-link-advertisement
The Interface Switching Capability Descriptor (ISCD) TLV may not be the right TLV for carrying FlexE link attributes;
The ISCD is designed to describe the “Interface Switching Capability”, and this is not about FlexE Switching;
Define a new TLV to carry the FlexE link attributes (see follow-up slides)

3. Terminologies A FlexE interface A FlexE sub-interface
Is a logical interface and consists of 1 to GBASE-R Ethernet interfaces
Can be channelized into multiple sub-interfaces
A FlexE sub-interface
Is a channelized sub-interface of an FlexE interface
A FlexE link connects two FlexE interfaces
A FlexE sub-link connects two FlexE sub-interfaces
FlexE link
Before starting to talk about the control plane of FlexE, let’s have a glance at the FlexE data plane again.
Here lists several FlexE related terms that will be used in the FlexE control plane.
The first one is FlexE interface, if you still remember, as introduced in Iftekhar’s presentation, FlexE can support bonding and channelization, a FlexE interface is such a logical bonded interface, it consists of 1 to GBASE-R Ethernet interfaces. A flexE interface can also be channelized into multiple sub-interfaces.
The link that connects two FlexE interfaces is called FlexE link, you can see the green big pipe illustrated in the below figure. The link that connects two sub-interfaces is call FlexE sub-link, you can see the small piples in the below figure.
FlexE interface
FlexE sub-interface
FlexE sub-Link

4. FlexE Link Advertisement
FlexE Interface sub-TLV
A new sub-TLV to the extended IS reachability TLV [RFC5303]
Describing the attributes of a FlexE interface
Carrying the FlexE Group Number, Granularity, and Available Slots of a FlexE interface
the extended IS reachability TLV [RFC5307]

5. FlexE Sub-link Advertisement
A FlexE sub-link
Advertised as an normal link
Add a new flag to “Link attribute sub-TLV” [RFC5029] to indicate whether a link is a “Channelized FlexE sub-link”
The flag can be used by a controller or a node to compute a path that is required to over FlexE sub-links.
the extended IS reachability TLV [RFC5307]

6. Next steps
Extensions to OSPF
Solicit more reviews and comments

7. Thanks