HUAWEI TECHNOLOGIES CO LTD Distributed Access Architectures Authors Hesham ElBakoury Version 10 HUAWEI TECHNOLOGIES CO LTD Page 2 Objectives Present current Cablelabs Distributed A ID: 821573
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www.huawei.com HUAWEI TECHNOLOGIES CO., LTD. Distributed Access Architectures Authors: Hesham ElBakoury Version: 1.0 HUAWEI TECHNOLOGIES CO., LTD. Page 2 Objectives ï¬Present current Cablelabs Distribu
ted Access Architectures. ï¬Discuss
ted Access Architectures. ï¬Discuss if/how IEEE 1904.2 should support these architectures. HUAWEI TECHNOLOGIES CO., LTD. Page 3 Agenda ï¬Cablelabs Distributed Access Architectures ï¬Remote MAC & PHY (R-MACPHY) ï°Fu
nctional Modules of Distributed CMTS Arc
nctional Modules of Distributed CMTS Architecture ï°R-MACPHY System Architecture ï°R-MACPHY Management Architecture ï¬Remote PHY (R-PHY) ï°L2TPv3 Pseudo-wires ï°R-PHY System Architecture ï°Example of R-PHY
L2TPv3 Topologies ï°R-PHY Tunneli
L2TPv3 Topologies ï°R-PHY Tunneling Protocols (use L2TPv3 â RFC3931). ï®DEPI (Downstream External PHY Interface) ï®UPEI (Upstream External PHY Interface) HUAWEI TECHNOLOGIES CO., LTD. Page 4 Distributed Access Arc
hitectures HUAWEI TECHNOLOGIES CO., LT
hitectures HUAWEI TECHNOLOGIES CO., LTD. Page 5 R-MACPHY 1 HUAWEI TECHNOLOGIES CO., LTD. Page 6 Functional Modules of the Distributed CMTS Architecture System control module: This logical module is responsible for Conf
iguration and management of the RFI mod
iguration and management of the RFI module and the classification and forwarding module. For example, during CM registration, the system control module parses service flows and classification information reported by the CM and config
ures the classification and forwarding
ures the classification and forwarding module accordingly. In addition, the system control module works with the NMS and the configuration system for service configuration and management. HUAWEI TECHNOLOGIES CO., LTD. Page 7 R-
MACPHY Architecture ï R-MA
MACPHY Architecture ï R-MACPHY Controller manages the configuration of the of the R-MACPHY device. ï The Controller can be either a separate device or a component embedded in an aggregation and switching device, such a
s a router, a switch, or an OLT HUAWEI
s a router, a switch, or an OLT HUAWEI TECHNOLOGIES CO., LTD. Page 8 R-MACPHY Management Using the Controller ï OLT/Router is managed using existing management systems. ï CM is Managed using existing DOICSIS provisio
ning and NMS systems. ï R-MACP
ning and NMS systems. ï R-MACPHY devices and their CM interfaces are managed like slots in CMTS Chassis. ï No interest within China MSO for interoperability between Controller and R-MACPHY (CMC). Therefore, there is no
interest to update CDMM to reflect new r
interest to update CDMM to reflect new requirements. As a result vendors such as Huawei implement their own L2 protocol. ï Huawei proposes Netconf/SNMP as the management protocol between the controller and R-MACPHY node. PNM is
used for MER Reporting, Symbol Capture,
used for MER Reporting, Symbol Capture, FEC Error Reporting PHY Stats Reporting HUAWEI TECHNOLOGIES CO., LTD. Page 9 R-PHY 2 HUAWEI TECHNOLOGIES CO., LTD. Page 10 L2TPv3 Tunnels and Pseudo-wires ï¬The base protocol t
hat is used for the DEPI is the Layer 2
hat is used for the DEPI is the Layer 2 Tunneling Protocol Version 3, or L2TPv3 for short [RFC3931]. ï¬L2TPv3 is an IETF protocol that is a generic protocol for creating a pseudowire (PW) ï¬PW is defined in RFC 3955 (Pseudo-
wire Emulation Edge to Edge Architecture
wire Emulation Edge to Edge Architecture â PWE3) as an Emulation of Point to point connection over a packet switching network (PSN). ï¬L2TPv3 tunnel can carry more than one session (PW). ï¬There is an optional L2-Specific S
ublayer is an intermediary layer betwe
ublayer is an intermediary layer between the L2TP session header and the start of the tunneled frame. HUAWEI TECHNOLOGIES CO., LTD. Page 11 R-PHY System Architecture HUAWEI TECHNOLOGIES CO., LTD. Page 12 R-PHY
L2TPv3 Topology HUAWEI TECHNOLO
L2TPv3 Topology HUAWEI TECHNOLOGIES CO., LTD. Page 13 R-PHY L2TPv3 Topology â Multiple Tunnels HUAWEI TECHNOLOGIES CO., LTD. Page 14 Remote PHY Pseudo-wires HUAWEI TECHNOLOGIES CO., LTD. Page 15 Downstre
am External PHY Interface (DEPI) ïD
am External PHY Interface (DEPI) ïData plane protocol for DS direction ïBased on L2TPv3 ïSupport IP encapsulation HUAWEI TECHNOLOGIES CO., LTD. Page 16 Downstream External PHY Interface (DEPI) ï¬Based on L2TPv3
with IP Encapsulation ï¬Only Sessio
with IP Encapsulation ï¬Only Session ID as L2TPv3 Data Header. Cookies are not used. ï¬Supports both DOCSIS Packet Streaming Protocols (PSP) and DOCSIS MPEG Transport (D-MPT) HUAWEI TECHNOLOGIES CO., LTD. Page 17 Upstr
eam External PHY Interface (UEPI) ï±
eam External PHY Interface (UEPI) ï±Only session ID is used. No Cookies ï±Based on L2TPv3 with IP encapsulation ï±Supports PSP. HUAWEI TECHNOLOGIES CO., LTD. Page 18 THANK YOU HUAWEI TECHNOLOGIES CO., LTD.
Page 19 L2TPv3 UDP encapsulation (Not
Page 19 L2TPv3 UDP encapsulation (Not Used in R-PHY) ï¬Protocol ID is 17 (UDP) ï¬Use 8 bytes L2TPv3 Data Header -4B Version Header -4B Session ID HUAWEI TECHNOLOGIES CO., LTD. Page 20 UMT Discovery Protocol â