中国电信(CTC)EPON设备技术要求V2[1].1(091012修订版) - 图文

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7) Service SLA

定义:ONU上每个业务队列的SLA及上行队列调度管理,其Variable Container的格式如表22 所示。

表22 Service SLA Variable Container Format 字节数 1 2 1 字段 Branch(0XC7) Leaf(0x0006) Variable Width Operation of ServiceDBA Best effort scheduling scheme 描述 Extended attributes branch ONU的ServiceSLA管理 Possible Value is 1 if operation is deactivate or 8+10N (N – Number of services) if operation is activate 0x00 Deactivate 0x01 Activate Possible values: 0 – SP 1 – WRR 2 – SP+WRR Relevant only when using SP+WRR scheduling. Priorities greater than or equal to this value are considered high priority and are transmitted in SP fashion. Priorities less than this value are considered low priority and are transmitted in WRR fashion. Given in TQ units. Possible values: 1 – 8 Queue to which service traffic is classified, and possible value is 0-7.. Given in byte units,用于表示特定的包长(如TDM的PWE3包)。当本字段值为0x0000时,表示没有包长的限制。下同。 Fixed bandwidth in 256 Kbps units。等于0x0000表示没有固定带宽。 Assured bandwidth in 256 Kbps units Best effort bandwidth in 256 Kbps units Possible values: 0 (SP), 1 – 100 (WRR) … Queue to which service traffic is classified. Given in byte units. Fixed bandwidth in 256 Kbps units Assured bandwidth in 256 Kbps units Best effort bandwidth in 256 Kbps units Possible values: 0 (SP), 1 – 100 (WRR) 1 1 1 High priority boundary 4 1 1 2 Cycle length Number of services (N) Queue number of 1st service Fixed packet size of 1st service Fixed bandwidth of 1st service Guaranteed bandwidth of 1st service Best effort bandwidth of 1st service WRR weight of 1st service … Queue number of Nth service Fixed packet size of Nth service Fixed bandwidth of Nth service Guaranteed bandwidth of Nth service Best effort bandwidth of Nth service WRR weight of Nth service 2 2 2 1 … 1 2 2 2 2 1 Notes: 1. For single port SFU ONU , if this attribute is used then “EthPortUS Policing” attribute should not be

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used, since both attributes affect the upstream policing in the ONU.

2. Best effort scheduling scheme affects only best effort bandwidth. Fixed bandwidth and guaranteed bandwidth of each service are transmitted regardless of the scheduling scheme. When the best effort scheduling scheme is SP the WRR weight fields must all be 0.

3. Cycle length parameter indicates OLT DBA cycle and is needed in order to optimize ONU

transmission. Setting cycle length to 0 has the effect of stopping per service SLA and scheduling and going back to basic SP scheduling.

4. Each service must use a different queue.

5. Suggested minimum requirement of service queue is 4 and maximum service queue number is 8 6. It is common for fixed-bandwidth traffic uses fixed packet size, and the parameter does not make sense for other traffic.

7. WRR weight of an active service participating in SP must be 0.

8. The sum of WRR weight over the active services participating in WRR must be 100. 9. This attribute is ONU based, thus the Index of Instance field is not required.

8) EthLinkState

定义:以太网端口的链路运行状态。OLT利用本属性查询ONU的以太网UNI接口的链路状态。其具体的Variable Container格式如表23所示:

表23 EthLinkState Variable Container Format 字节数 1 2 1 1 字段 Branch(0XC7) Leaf(0x0011) Variable Width LinkState 描述 Extended attributes branch Ethernet Port Link Operation Status 当用作Variable width时,其取值为1; 0x00――the Ethernet link connected with the Ethernet port is DOWN; 0x01――the Ethernet link connected with the Ethernet port is UP; 由于本属性需要指定其管理对象的具体实例(以太网端口),所以需要使用管理对象的实例索引TLV。

9) EthPort Pause

定义:以太网端口的流控功能(Flow Control)。其具体的Variable Container格式如表24所示:

表24 EthPort Pause Variable Container Format 字节数 1 2 1 1 字段 Branch(0XC7) Leaf(0x0012) Variable Width 描述 Extended attributes branch Ethernet Port flow control 当用作Variable width时,其取值为1; 0x00――Flow Control disabled or to deactivate the 1st Port Back Pressure Operation function, 0x01――Flow Control enabled or to activate the function, 由于本属性需要指定其管理对象的具体实例,所以需要使用管理对象的实例索引TLV。 ONU上的以太网端口的Pause流控的相关参数,如Back Pressure Time、Back Pressure Occur/Clear Queue Threshold等,由设备厂商自行规定。

10) EthPortUSPolicing

定义:以太网端口的上行业务的入口管制(Ingress Policing)功能。ONU的UNI口采用单速Policing方式。MDU和MTU型ONU应支持该属性。其具体的Variable Container格式如表 25所示:

表25 EthPort Policing Variable Container格式 字节数 字段 描述 34

1 Branch(0XC7) Extended attributes branch 2 Leaf(0x0013) Ethernet Port Upstream Policing 1 Variable Width 当用作Variable width时,其取值为1(Port Policing operation字段为0x00时)或者10(Port Policing operation字段为0x01时); 1 Port Policing 0x00――Policing disactivated or to deactivate the operation function, 0x01――Policing activated or to activate the function, The default value of this field is 0x00. 3 Port Policing CIR This parameter indicates the committed Information Rate of the port. The parameter presents the rate in Kbps. Values: 0x000000 to 0xFFFFFF. 当Port Policing Operation字段值为“0x00”时,则无本字段。 3 Port Policing This parameter identifies the depth of this token bucket depth(CBS) bucket to tolerant the certain burst. The unit of CBS is byte。CBS的值应该大于以太网包的最大包长(例如1522字节)。 当Port Policing Operation字段值为“0x00”时,则无本字段。 3 Port Policing extra This parameter identifies the extra token to permet burst size(EBS) the forwarding engine to finish the packet being sent when the CBS is exhausted. Here the Unit of EBS token is byte。也就是这里的EBS值的单位是byte。EBS的值应该小于或等于以太网包的最大包长(例如1522字节)。 当Port Policing Operation字段值为“0x00”时,则无本字段。 由于本属性需要指定其管理对象的具体实例,所以需要使用管理对象的实例索引TLV。 VoIP Port

定义:VoIP端口的管理(打开或者关闭)。其Variable Container格式如表26所示:

表26 VoIP Port Variable Container Format 字节数 字段 描述 1 Branch(0XC7) Extended attributes branch 2 Leaf(0x0014) POTS(based on VoIP)Port management. 1 Variable Width 当用作Variable width时,其取值为1; 1 Lock/Unlock 0x00――Port disactivated or to disactivate the port 0x01――port activated or to activate the port The default value of this field is 0x00. 由于本属性需要指定其管理对象的具体实例,所以需要使用管理对象的实例索引TLV。 E1 Port

定义:E1 TDM端口的管理(打开或者关闭)。其Variable Container格式如表27所示:

表27 E1 Port Variable Container Format 字节数 字段 描述 1 Branch(0XC7) Extended attributes branch 35

11)

12) 2 1 1 Leaf(0x0015) Variable Width Lock/Unlock E1(based on CESoP)Port management. 当用作Variable width时,其取值为1; 0x00――Port disactivated or to disactivate the port 0x01――port activated or to activate the port The default value of this field is 0x00. 由于本属性需要指定其管理对象的具体实例,所以需要使用管理对象的实例索引TLV。

13) EthPortDS RateLimiting

定义:以太网端口的下行速率限制功能。ONU的UNI端口下行限速建议采用Traffic Shaping方式。本属性的远程配置参数包括CIR和PIR,对于端口下行限速的其他参数,各厂商可自行定义其缺省值。MDU和MTU型ONU应支持该属性。其具体的Variable Container格式如表28所示:

表28 EthPortDS Ratelimiting Variable Container格式 字节数 1 2 1 字段 Branch(0XC7) Leaf(0x0016) Variable Width 描述 Extended attributes branch Ethernet Port Downstream Ratelimiting 当用作Variable width时,其取值为1(Port DS Ratelimitng operation字段为0x00时)或者7(Port DS Ratelimiting operation字段为0x01时); Port DS Ratelimiting 0x00――DS Ratelimiting disabled or to deactivate the function; operation 0x01――DS Ratelimiting enabled or to activate the function; The default value of this field is 0x00。 Port DS Ratelimiting This parameter indicates the Downstream committed 3 CIR Information Rate of the port. The parameter presents the rate in Kbps. Values: 0x000000 to 0xFFFFFF. 当Port Ratelimiting Operation字段值为“0x00”时,则无本字段。 Port DS Ratelimiting This parameter identifies the downstream Peak 3 PIR Information Rate. The parameter presents the rate in Kbps. 当Port Ratelimiting Operation字段值为“0x00”时,则无本字段。 由于本属性需要指定其管理对象的具体实例,所以需要使用管理对象的实例索引TLV。

14) VLAN

定义:对以太网端口的VLAN配置。包含transparent、tag、translation、N:1Aggregation、Trunk等模式。其Variable Container格式如表29所示。对VLAN的操作针对端口进行。每个Variable Container中只能包含对一个端口的VLAN管理。这里是指单播VLAN,不涉及对组播VLAN的配置和查询。对于特定端口的VLAN配置命令应通过一个Container封装。每个端口只能配置一种VLAN模式,不能同时配置多种VLAN模式。对于特定端口,新的VLAN Container中的VLAN配置将覆盖原有的VLAN配置。如果需要新增VLAN转换条目或者新增N:1VLAN聚合组,则OLT应将该端口的所有VLAN表项重新下发到ONU,并且覆盖该端口保存的已有的VLAN表项。

表29 VLAN Variable Container Format 1 字节数 1 字段 Branch(0XC7) Extended attributes branch 描述 36

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