rfc9884v2.txt   rfc9884.txt 
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Table 1: Sub-TLVs for PSID Checks Table 1: Sub-TLVs for PSID Checks
As specified in Section 2 of [RFC9545], a PSID is used to identify As specified in Section 2 of [RFC9545], a PSID is used to identify
the following: the following:
* a single segment list, some segment lists, or all segment lists in * a single segment list, some segment lists, or all segment lists in
a candidate path of an SR Policy, a candidate path of an SR Policy,
* some segment lists across multiple candidate paths of an SR * some segment lists across multiple candidate paths of an SR
policy, or Policy, or
* all segment lists in all candidate paths of an SR Policy. * all segment lists in all candidate paths of an SR Policy.
Therefore, six different Target FEC Stack sub-TLVs need to be defined Therefore, six different Target FEC Stack sub-TLVs need to be defined
for PSID. The ordered list of selection rules for the six Target FEC for PSID. The ordered list of selection rules for the six Target FEC
Stack sub-TLVs are defined as follows: Stack sub-TLVs are defined as follows:
* When a PSID is used to identify all segment lists in an SR Policy, * When a PSID is used to identify all segment lists in an SR Policy,
the Target FEC Stack sub-TLV of the type "SR Policy Associated the Target FEC Stack sub-TLV of the type "SR Policy Associated
PSID" (for IPv4 or IPv6) MUST be used for PSID checks. PSID" (for IPv4 or IPv6) MUST be used for PSID checks.
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