1/base.txt 2/issue39.txt
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An unused field. It MUST be initialized to zero by the sender An unused field. It MUST be initialized to zero by the sender
and MUST be ignored by the receiver. and MUST be ignored by the receiver.
Valid Options: Valid Options:
Certificate Certificate
One certificate is provided in each Certificate option, to One certificate is provided in each Certificate option, to
establish a (part of a) certificate chain to a trust anchor. establish a (part of a) certificate chain to a trust anchor.
The certificate of the trust anchor itself SHOULD NOT be
included.
Trust Anchor Trust Anchor
Zero or more Trust Anchor options may be included to help Zero or more Trust Anchor options may be included to help
receivers decide which advertisements are useful for them. If receivers decide which advertisements are useful for them. If
present, these options MUST appear in the first component of a present, these options MUST appear in the first component of a
multi-component advertisement. multi-component advertisement.
Future versions of this protocol may define new option types. Future versions of this protocol may define new option types.
Receivers MUST silently ignore any options they do not recognize Receivers MUST silently ignore any options they do not recognize
and continue processing the message. and continue processing the message.

Diff produced by rfcdiff v0.34, from http://www.levkowetz.com/ietf/tools/rfcdiff/