ISIS Extensions for FlexE Link Advertisement draft-zhu-ccamp-flexe-link-advertisement-01 Yongqing Zhu(zhuyq@gsta.com) Huanan Chen(chenhuanan@gsta.com) Mach Chen(mach.chen@huawei.com) Zongpeng Du (duzongpeng@huawei.com )

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)

Terminologies A FlexE interface A FlexE sub-interface Is a logical interface and consists of 1 to 254 100GBASE-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 254 100GBASE-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

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]

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]

Next steps Extensions to OSPF Solicit more reviews and comments

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