MNA for Performance Measurement with Alternate Marking Method China MobileBeijingChinachengweiqiang@chinamobile.comZTE Corp.NanjingChinaxiao.min2@zte.com.cnCisco Systems, Inc.Canadargandhi@cisco.comEricssonUnited States of Americagregimirsky@gmail.com
Routing
MPLS Working GroupRequest for CommentsRFCInternet DraftI-D MPLS Network Action (MNA) is used to indicate action for Label Switched Paths (LSPs) and/or MPLS packets
and to transfer data needed for the action. This document defines MNA encoding for MPLS performance measurement with alternate marking
method, which performs flow-based packet loss, delay, and jitter measurements on MPLS live traffic. MPLS Network Action (MNA) is used to indicate action for Label Switched Paths (LSPs) and/or MPLS packets
and to transfer data needed for the action. To addressing the MNA requirements and by following the MNA
framework , defines the MNA sub-stack
solution for carrying Network Actions and Ancillary Data in the label stack. As specified in , Flow-ID Label, L bit and D bit are used
for MPLS flow identification and flow-based performance measurement with alternate marking method, which can be
an applicable MNA usecase . This document defines MNA encoding for MPLS performance measurement with alternate marking method, which performs
flow-based packet loss, delay, and jitter measurements on MPLS live traffic. The proposed MNA encoding is compliant
with the MNA sub-stack solution specified in and reuses the data fields specified
in . This document makes use of the terms defined in and
. The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED",
"NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14
when, and only when, they appear in all capitals, as shown here. The MNA format for performance measurement with alternate marking method is illustrated as below: The description of MNA for Alternate Marking is as follows:
Name: Performance Measurement with Alternate Marking Method (PMAMM) Action.
Network Action Indication: The PMAMM Action indication is Opcode TBA1. LSE Format C defined in
is used here.
Scope: The PMAMM Action is valid in all scopes.
In-Stack Data: The PMAMM Action carries 20 bits of ancillary data. The most significant 18 bits of ancillary data is the
Flow-ID Value, immediately followed by L bit and D bit. The three fields Flow-ID Value, L bit and D bit have semantics
consistent with the Flow-ID Label, L bit and D bit defined in ,
except that the Flow-ID Value is an 18-bit value while the Flow-ID Label is a 20-bit value. While the Flow-ID Label has
some restrictions to avoid collisions with the reserved label space (0-15) , those restrictions
are not necessary for the Flow-ID Value and do not apply. The forwarding node in the scope of PMAMM Action SHOULD execute
the flow-based performance measurement by using the Flow-ID Value, L bit and D bit.
Post-Stack Data: None.
Security issues discussed in and
apply to this document. This document requests that IANA allocates a codepoint (TBA1) from the MPLS "HBH and Select In-Stack MPLS Network Action
Indicator Opcodes" from the "IETF Review" range and the same codepoint from the MPLS "I2E In-Stack MPLS Network Action Indicator
Opcodes" from the "IETF Review" range for the Performance Measurement with Alternate Marking Method Action. Note that both the
"HBH and Select In-Stack MPLS Network Action Indicator Opcodes" and the "I2E In-Stack MPLS Network Action Indicator Opcodes" will
be created based on the request from . Specifically, this document requests the following
allocation from IANA. To be added.