rfc9008v4.txt   rfc9008.txt 
skipping to change at line 367 skipping to change at line 367
that the 6LN supports decapsulating IP-in-IP, but that is not assumed that the 6LN supports decapsulating IP-in-IP, but that is not assumed
by [RFC8504]. If the 6LN is a RUL, the root that encapsulates a by [RFC8504]. If the 6LN is a RUL, the root that encapsulates a
packet SHOULD terminate the tunnel at a parent 6LR. The root may packet SHOULD terminate the tunnel at a parent 6LR. The root may
encapsulate all the way to the RUL if it is aware that the RUL encapsulate all the way to the RUL if it is aware that the RUL
supports IP-in-IP decapsulation and the artifacts in the outer header supports IP-in-IP decapsulation and the artifacts in the outer header
chain. chain.
A node that is reachable over an external route is not expected to A node that is reachable over an external route is not expected to
support [RFC8138]. Whether a decapsulation took place or not and support [RFC8138]. Whether a decapsulation took place or not and
even when the 6LR is delivering the packet to a RUL, the 6LR that even when the 6LR is delivering the packet to a RUL, the 6LR that
injected an external route MUST uncompress the packet before injected an external route MUST undo the [RFC8138] compression on the
forwarding over that external route. packet before forwarding over that external route.
4.1.2. Configuration Options and Mode of Operation 4.1.2. Configuration Options and Mode of Operation
Section 6.7.6 of [RFC6550] describes the DODAG Configuration option Section 6.7.6 of [RFC6550] describes the DODAG Configuration option
as containing a series of flags in the first octet of the payload. as containing a series of flags in the first octet of the payload.
Anticipating future work to revise RPL relating to how the LLN and Anticipating future work to revise RPL relating to how the LLN and
DODAG are configured, this document renames the IANA "DODAG DODAG are configured, this document renames the IANA "DODAG
Configuration Option Flags" subregistry so that it applies to Mode of Configuration Option Flags" subregistry so that it applies to Mode of
Operation (MOP) values zero (0) through six (6) only, leaving the Operation (MOP) values zero (0) through six (6) only, leaving the
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