rfc9604v2.txt   rfc9604.txt 
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requires the removal of the binding value for the LSP. When requires the removal of the binding value for the LSP. When
unset, the PCEP peer indicates that the binding value is added unset, the PCEP peer indicates that the binding value is added
or retained for the LSP. This flag is used in the PCRpt and or retained for the LSP. This flag is used in the PCRpt and
PCUpd messages. It is ignored in other PCEP messages. PCUpd messages. It is ignored in other PCEP messages.
- The unassigned flags MUST be set to 0 while sending and ignored - The unassigned flags MUST be set to 0 while sending and ignored
on receipt. on receipt.
* Reserved: MUST be set to 0 while sending and ignored on receipt. * Reserved: MUST be set to 0 while sending and ignored on receipt.
* Binding value: A variable-length field, padded with trailing zeros * Binding Value: A variable-length field, padded with trailing zeros
to a 4-octet boundary. When the BT is 0, the 20 bits represent to a 4-octet boundary. When the BT is 0, the 20 bits represent
the MPLS label. When the BT is 1, the 32 bits represent the MPLS the MPLS label. When the BT is 1, the 32 bits represent the MPLS
label stack entry as per [RFC3032]. When the BT is 2, the 128 label stack entry as per [RFC3032]. When the BT is 2, the 128
bits represent the SRv6 SID. When the BT is 3, the binding value bits represent the SRv6 SID. When the BT is 3, the binding value
also contains the SRv6 Endpoint Behavior and SID Structure, also contains the SRv6 Endpoint Behavior and SID Structure,
defined in Section 4.1. In this document, the TE-PATH-BINDING TLV defined in Section 4.1. In this document, the TE-PATH-BINDING TLV
is considered to be empty if no binding value is present. Note is considered to be empty if no binding value is present. Note
that the length of the TLV would be 4 in such a case. that the length of the TLV would be 4 in such a case.
4.1. SRv6 Endpoint Behavior and SID Structure 4.1. SRv6 Endpoint Behavior and SID Structure
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The Binding Value consists of: The Binding Value consists of:
* SRv6 Binding SID: 16 octets. The 128-bit IPv6 address, * SRv6 Binding SID: 16 octets. The 128-bit IPv6 address,
representing the binding SID for SRv6. representing the binding SID for SRv6.
* Reserved: 2 octets. It MUST be set to 0 on transmit and ignored * Reserved: 2 octets. It MUST be set to 0 on transmit and ignored
on receipt. on receipt.
* Endpoint Behavior: 2 octets. The Endpoint Behavior code point for * Endpoint Behavior: 2 octets. The Endpoint Behavior code point for
this SRv6 SID as defined by the "SRv6 Endpoint Behaviors" registry this SRv6 SID as defined by the "SRv6 Endpoint Behaviors" registry
[RFC8986]. When the field is set with the value 0, the endpoint [RFC8986]. When the field is set with the value 0, the Endpoint
behavior is considered unknown. Behavior is considered unknown.
* [RFC8986] defines an SRv6 SID as consisting of LOC:FUNCT:ARG, * [RFC8986] defines an SRv6 SID as consisting of LOC:FUNCT:ARG,
where a locator (LOC) is encoded in the L most significant bits of where a locator (LOC) is encoded in the L most significant bits of
the SID, followed by F bits of function (FUNCT) and A bits of the SID, followed by F bits of function (FUNCT) and A bits of
arguments (ARG). A locator may be represented as B:N, where B is arguments (ARG). A locator may be represented as B:N, where B is
the SRv6 SID locator block (IPv6 prefix allocated for SRv6 SIDs by the SRv6 SID locator block (IPv6 prefix allocated for SRv6 SIDs by
the operator) and N is the identifier of the parent node the operator) and N is the identifier of the parent node
instantiating the SID, called "locator node". The following instantiating the SID, called "locator node". The following
fields are used to advertise the length of each individual part of fields are used to advertise the length of each individual part of
the SRv6 SID: the SRv6 SID:
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