pon (Access-Line Rate Adjustment)

Syntax

Hierarchy Level

Description

Configure adjustments to actual PON data rates as follows:

Multiply the actual data rate by a percentage for only downstream rates or for both upstream an downstream rates
Adjust the encapsulation overhead by adding to or subtracting from the total cell or frame bytes a specified number of bytes

The actual (unadjusted) downstream and upstream data rates, PON line type, and encapsulation mode are received from the access node by the ANCP agent in ANCP port messages, or by the PPPoE daemon from the PPPoE intermediate agent (PPPoE-IA) in PADI or PADR messages. The ANCP agent or PPPoE daemon subsequently adjusts rates and bytes based on the configuration.

If the PON-Access-Type TLV (0x92) is not received in either the ANCP Port Status message or PPPoE-IA tags, the default adjustment leaves the rates and bytes unchanged.

Adjustments are applied to all subscribers using access lines of the specific PON line type. Depending on the value, it may be reported to AAA, CoS, or both:

Adjusted and unadjusted downstream and upstream rates are always reported to AAA in response to an AAA request.
Adjusted and unadjusted downstream rates and overhead byte adjustments are reported to CoS, but only when you include the qos-adjust statement at the [edit protocols ancp] hierarchy level.
Overhead byte adjustments are not reported to AAA.

AAA reports the adjusted values to the RADIUS server in the Access-Request and Accounting-Request messages through Juniper Networks VSAs 26-141, Downstream-Calculated-Qos-Rate Rate, and 26-142, Upstream-Calculated-Qos-Rate. A change in value triggers an immediate Interim-Accounting message to the RADIUS server if you have configured the ancp-speed-change-immediate-update statement.

The ANCP agent reports these values to the LAC in an L2TP network. The LAC passes the rates to the LNS in the following AVPs and messages:

AVP 24, Tx Connect Speed (ICCN message)—For the initial total rate adjustment to ONT/ONU-Peak-Data-Rate-Downstream TLV (0x94).
AVP 38, Rx Connect Speed (ICCN message)—For the initial total rate adjustments to ONT/ONU-Peak-Data-Rate-Upstream TLV (0x95).
AVP 97, Connect Speed Update (CSUN message)—For subsequent changes to the initial rates reported in AVP 24 and AVP 38.

Options

gpon	Sets attributes for GPON access lines.
other	Sets attributes for access lines of type OTHER. This might used, for example, when an OLT uses a new PON type that is not yet formally supported by the Broadband Forum.
overhead-adjust `percentage`	Adjusts the actual downstream rates for all subscribers on an access line or PON tree of the specified types by multiplying the rate by the specified percentage. This adjustment accounts for the Layer 1 overhead for the PON type. The rates are adjusted as follows: For the subscriber access line, the adjustment is made to the downstream rate reported in the ONT/ONU-Peak-Data-Rate-Downstream TLV (0x94). The adjusted rate is applied to the logical interface or the (child) interface set for the subscriber access line, as determined by the CoS adjustment control profile. This adjustment applies for FTTH connections. For the PON tree, the adjustment is made to the downstream rate reported in the PON-Tree-Maximum-Data-Rate-Downstream TLV (0x98). The adjusted rate is applied to the PON tree (parent) interface set, as determined by the CoS adjustment control profile. This adjustment applies for both FTTH and FTTB connections. For FTTB, this is the rate on the OLT to DPU-P access line. Range: 80 through 100 percent Default: 100 percent
overhead-bytes `bytes`	Adjusts the actual downstream cell overhead for all subscribers on the specified access line or PON tree by adding or subtracting the specified number of bytes. The adjustment accounts for the traffic encapsulation overhead. It shapes the logical interface or the (child) interface set for the subscriber access line or the PON tree (parent) interface set, as determined by the CoS adjustment control profile. The overhead is adjusted as follows: For the subscriber access line, the adjustment is made to the overhead reported in the ONT/ONU-Peak-Data-Rate-Downstream TLV (0x94). The adjusted overhead is applied to the logical interface or the (child) interface set for the subscriber access line, as determined by the CoS adjustment control profile. This adjustment applies for FTTH connections. For the PON tree, the adjustment is made to the overhead reported in the PON-Tree-Maximum-Data-Rate-Downstream TLV (0x98). The adjusted overhead is applied to the PON tree (parent) interface set, as determined by the CoS adjustment control profile. This adjustment applies for both FTTH and FTTB connections. For FTTB, this is the overhead on the OLT to DPU-P access line. Range: -100 through 100 bytes Default: 0 bytes
twdm-pon	Sets attributes for TWDM-PON access lines.
total-adjust `percentage`	Adjusts the downstream and upstream data rates for all subscribers on an access line of the specified type by multiplying the rate by the specified percentage. This adjustment accounts for the total Layer 1 and encapsulation overhead for the PON type. The adjustment is made to the ONT/ONU-Peak-Data-Rate-Downstream TLV (0x94) and the ONT/ONU-Maximum-Data-Rate-Upstream TLV (0x95). The adjustments apply to FTTH connections. Range: 1 through 100 percent Default: 100 percent
type `tlv-value`	Sets attributes for access lines by specifying the unsigned integer value of the PON-Access-Type TLV (0x92) to reference the PON type. This option enables the `pon` statement to be used for PON access line types that might be introduced in the future. Range: 6 through 4294967295
wdm-pon	Sets attributes for WDM-PON access lines.
xg-pon1	Sets attributes for XG-PON access lines.
xgs-pon	Sets attributes for XGS-PON access lines.

Required Privilege Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 19.3R1.

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