SVC (Service)

Service Profiles control fundamental service attributes for DSL and Ethernet cross-connections such as Service Type, VLAN priority, and rate information. Connection Profiles are stored on the Panorama PON server and on those devices that have cross-connections associated with a profile.

This section summarizes the types of data services (Service Types) supported in Panorama PON for the Tellabs 1100 Series Optical LAN ONTs. Each of these OLTs support this minimum set of Connection Profile Service Types for data cross-connections.

With the transparent Bridged N:N Service Type configured for a connection, the system supports mixed IPv4 and IPv6 traffic and bridging of the traffic (all Ethertypes) at the OLT between ONT UNIs. In addition to switching traffic between any ports, this feature provides flooding of upstream and downstream Multicast, unlearned Unicast, and Broadcast traffic in accordance with standard IEEE 802.1Q frame filtering and forwarding. To protect bandwidth utilization while performing these flooding functions, the OLT provides strict metering of flooded flows and rate limits for flooded packets.

When this service type is enabled, the flooding of broadcast, multicast, and unlearned Unicast still occurs with rate limiting. However, multicast group addresses that have been joined are forwarded at line rate to the subset of UNIs that have requested membership to that group.

Rate Shaping

Rate Shaping By VLAN

For the upstream flow, the ONT performs PIR/SIR token-based shaping on a per GEMPortId basis. However, the ONT does not perform per-priority queue PIR/SIR functions.

Figure 1: Rate Shaping by VLAN

Panorama PON initially creates a default Service profile. This profile is assigned to connections when they are initially provisioned. The default profile can be edited, but cannot be deleted. New profiles can be defined and used wherever needed. Conversely, the default profile does not need to be used.

Service Profile Attributes

The following Service profile attributes are available for user editing.

Service

• Service Type - The type of service provided, as follows:
  • IPTV - Supports customers that receive IPTV traffic separately from ISP traffic (This is a separate multicast TV VLAN connection). 
  • TLS - Provides secure end to end connections between applications or users. 
  • Bridge N:N - Provides transparent bridging (802.1Q) of all traffic types for the connection (including IPv4 and IPv6 support). Allows ONT-to-ONT communication without the need to split horizon router functions.
    • Default is Bridge N:N.
  • VLAN Trunk - Provides 24 tagged and 1 untagged VLAN and is dedicated to trunks and no other service type.

• IGMP Proxy - Defines whether the IGMP proxy should be enabled on the interface. It is assumed that the Network Interface that has the IGMP proxy enabled is the Network Interface where the originator of the IGMP query is found. It is allowed to enable the IGMP Proxy on multiple interfaces when redundant paths are defined.
  • Enable |Disable (default is Disabled)
• 802.1p Marking Mode - The pBit mode is used to set the pBit to DSCP mapping option method. Possible selections include:
  • STATIC - Sets the pBit statically on all packets to the same value (default). The pBit mode of STATIC indicates that the pBit value of ingress user traffic (traffic going from the subscriber port toward the network) is set to the value supplied in the VLAN Priority.
  • COPY - The Copy option is used with TLS or priority tagged to copy the pBits from the ingress stream. The granularity is on the GEM port, which equates to a connection. This option allows the system to mark voice as high priority and protect it with a real-time variable bit rate.
  • DSCP Mapped - The DSCP mapped option uses the DSCP to pBit mapping profile table to set the pBits on all packets.

• Marked 802.1p Priority - The quality of service (QOS) priority that is placed on untagged traffic in the upstream direction.
  • Values range from 0 (lowest priority) through 7 (highest priority). Default for is 0. Use the default for data connections. Set the VLAN Priority to 5 for voice connections. 
• 802.1q VLAN - Enter the network VLAN value.
  • Range is 0 to 4095 (default is 4095)
• Tag Type - Dropdown selection of Untagged or Tagged/Trunk or Priority Tagged
  • Default is Untagged
• Service Protocol - Designates the Bridging service protocol(s) for Ethernet subscriber lines.
  • Bridged N:N service type select one of the following Service Protocols:
    • IPv4 IPoE - Internet Protocol over Ethernet, IPv4 support only
    • Transparent - Supports mixed IPv4, IPv6, and other type data traffic (default)
      • Default is Transparent

• DHCP Option 82 - Service Type of Bridged N:N will be the replacements for ISP, or ISP+IPTV and the Service Protocol selection of IPv4 IPoE, or PPPoE + IPoE will use other equivalents, such as DHCP Option 82.

Downstream Rates

• Shaping - Enabled or Disabled
  • Default is Disabled
• Shaping Enabled
  • Shaping Mode - Select either Entire VLAN or Single 802.1p Priority. 
• Class of Service - Set the class of service (CoS). Each setting maps to a different CoS traffic contract (T-CONT).
  • CBR2 - Used for connections that transport traffic where the sustained and peak rates are identical. Typical applications include voice services that require a constant allocation of bandwidth for signaling. The bandwidth is allocated, whether used or not.
  • CBR1 - Used for connections that transport traffic at variable rates. A typical application that uses CBR1 are compressed video streams. Use when latency is of utmost concern. The bandwidth is allocated, whether used or not.
  • nrt-VBR - Used for connections that transmit bit rate traffic for which there is no inherent reliance on time synchronization between the traffic source and destination, but there is a need for an attempt at a specified bandwidth. An application that might require nrt-VBR service is Voice over Internet Protocol (VoIP) or IP-based VTC applications. This is an enhanced class of service with a higher priority than UBR connections.
  • UBR - Unspecified bit rate (default). Used for connections that transport variable bit rate traffic for which there is no reliance on time synchronization between the source and destination. UBR is generally used for applications that are very tolerant of delay and cell loss, such as file transfers, e-mail, IP streams, and general LAN connections, etc. Typical Active Ethernet CoS.
    • Default is UBR
• Downstream Peak Rate - Peak rate (also referred to as peak information rate (PIR)) is the shape rate for downstream traffic.
  • Range is 256 Kbps - 1000192 Kbps downstream, in increments of 256 Kbps. Default is 10240 Kbps.

Note 1: This entry cannot be less than the Sustained Rate.

Note 2: If using a value less than 512 Kbps is set, the ONTs automatically set this rate to 512 Kbps.

Note 3: When creating a connection profile, the best upstream performance is achieved when an Ethernet Port Profile is created with the desired Upstream CIR rate

• Downstream Sustained Rate - Sustained rate (also referred to as sustained information rate (SIR)) is the specified rate in the downstream traffic. 
  • Range is 0 Kbps - 1000192 Kbps in increments of 256 Kbps. Default is 1024 Kbps.

Note 1: This entry cannot be greater than the Peak Rate.

Note 2: If the associated hardware cannot support the specified rate, it approximates the specified rate as closely as possible.

Note 3: If using a value less than 512 Kbps, the ONTs automatically set this rate to 512 Kbps.

• Shaped 802.1p Priority - Shaped flow traffic classification (priority). Used only when the Rate Limit Mode is Single 802.1 pBit; only the downstream value is used, because the entire VLAN is shaped in the upstream direction.
  • Network priority values are 0 - 7, with 7 being the highest priority (default is 0). The purpose of this value is to differentiate the priorities of the HSI and set-top box traffic when on the same VLAN. Typically the priority of set-top box traffic is higher.

Upstream Rates

• Basis - Dropdown selection of Class-based or Rate-priority based
• Class based
  • Class of Service - Set the class of service (CoS). Each setting maps to a different CoS traffic contract (T-CONT).
    • CBR2 - Used for connections that transport traffic where the sustained and peak rates are identical. Typical applications include voice services that require a constant allocation of bandwidth for signaling. The bandwidth is allocated, whether used or not.
    • CBR1 - Used for connections that transport traffic at variable rates. A typical application that uses CBR1 are compressed video streams. Use when latency is of utmost concern. The bandwidth is allocated, whether used or not.
    • nrt-VBR - Used for connections that transmit bit rate traffic for which there is no inherent reliance on time synchronization between the traffic source and destination, but there is a need for an attempt at a specified bandwidth. An application that might require nrt-VBR service is Voice over Internet Protocol (VoIP) or IP-based VTC applications. This is an enhanced class of service with a higher priority than UBR connections.
    • UBR - Unspecified bit rate (default). Used for connections that transport variable bit rate traffic for which there is no reliance on time synchronization between the source and destination. UBR is generally used for applications that are very tolerant of delay and cell loss, such as file transfers, e-mail, IP streams, and general LAN connections, etc. Typical Active Ethernet CoS.
      • Default is UBR
  • Upstream Peak Rate - Peak rate (also referred to as peak information rate (PIR)) is the shape rate for both downstream traffic.
    • Range is 256 Kbps - 1000192 Kbps downstream, in increments of 256 Kbps. Default is 10240 Kbps.

Note 1: This entry cannot be less than the Sustained Rate.

Note 2: If using a value less than 512 Kbps is set, the ONTs automatically set this rate to 512 Kbps.

Note 3: When creating a connection profile, the best upstream performance is achieved when an Ethernet Port Profile is created with the desired Upstream CIR rate

• Upstream Sustained Rate - Sustained rate (also referred to as sustained information rate (SIR)) is the specified rate in the upstream traffic. 
  • Range is 0 Kbps - 1000192 Kbps in increments of 256 Kbps. Default is 1024 Kbps.

Note 1: This entry cannot be greater than the Peak Rate.

Note 2: If the associated hardware cannot support the specified rate, it approximates the specified rate as closely as possible.

Note 3: If using a value less than 512 Kbps, the ONTs automatically set this rate to 512 Kbps.

• Fixed Rate - Value will reflect Upstream Sustained Rate in Class of Service CBR1 and CBR2. 
• Rate-priority based
  • Additional Eligibility - Dropdown selection of: Best Effort | Not Assured | None 
• Best Effort - If any bandwidth is still available after all Non-assured TCONTs are saturated, then it is shared among best-effort TCONTs, using a system of priorities and weights. Priorities are absolute - no lower priority receives any additional bandwidth unless all higher priority TCONTs are saturated, and bandwidth still remains. Within a priority level, bandwidth is allocated in proportion to the assigned weight, up to saturation. 

• Non Assured - Any additional bandwidth is shared among these T-CONTs, proportionally to the sum of their fixed and assured bandwidth assignments, up to the configured maximum bandwidth (saturation). 
• None - Not eligible for any additional bandwidth 

• Best Effort Weight - A weight to be used in the weighted round robin when allocating traffic.  
  • Range 0-100 
• Best Effort Priority - A priority to be used that will indicate the relative priority of this traffic among others in the best effort class.
  • Range 1-8
• Maximum Bandwidth - The peak rate at which this service is allowed to transmit.
• Assured Bandwidth - The rate which the service is guaranteed during congestion. The sum of all assured and fixed bandwidth cannot exceed the link bandwidth. Unused assured bandwidth will be granted to other services if it is not being used by this service.
• Fixed Bandwidth - A fixed rate on the PON that the service will always be granted whether it uses it or not.  

Other

• Encrypt Downstream Data Flow - When this checkbox is selected (the default setting), this attribute enables the encryption of traffic between the Optical Line Terminal (OLT) and downstream Optical Network Terminals (ONTs). Downstream multicast is not encrypted. 
  • Enabled or Disabled Default is Disabled
• Circuit ID Template - Any string of up to 256 characters. Defines the format of the string put into the Circuit ID. It allows the use of variables so that the format can be defined. The variables are expanded at run time so that the full Circuit ID string is produced, and it is unique (if desired) per connection. The Circuit ID is defined by TR101 and typically is of the form: <TID> atm <slot>/<PON>/<ontid>/<port>:<vpi>.<vci> or <TID> eth <slot>/<pon>/<ontid>/<port>:<vlan>. 
• Remote ID Template - Any string of up to 256 characters. Defines the format of the string put into the Remote ID. It allows the use of Variables so that the format can be defined. The variables are expanded at run time so that the full Remote ID string is produced. The Remote ID is defined by TR101 and typically is something that uniquely identifies the customer such as a customer id, a phone number, an address, etc. 
• LLDP DSCP - Differentiated Services Code Point (DSCP). A method that attempts to ensure quality of service on large networks by assigning priority to traffic based on packet type (e.g., voice or data) value. The choices are 0 - 63 refer to DSCP Mapping for priority number.
• LLDP Application Type - Select the appropriate provisioned LLDP Application Type value to enable VoIP handsets. The choices are:
  • 0 = Data
  • 1 = Voice
  • 2 = Voice Signaling
  • 3 = Guest Voice
  • 4 = Guest Voice Signaling
  • 5 = Softphone Voice
  • 6 = Video Conferencing
  • 7 = Streaming video
  • 8 = Video Signaling
  • 9 - 255 = Reserved
  • Default 0 = Data

• ACL Profile - Specifies an ACL Profile from a dropdown list used to limit, deny or permit traffic to a particular VLAN that can be associated with a Service Profile.

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