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-00 of sidrops version published

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Randy Bush 2020-03-09 10:56:43 -07:00
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draft-ymbk-sidrops-8210bis.xml
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@ -945,7 +945,7 @@
0 8 16 24 31
.-------------------------------------------.
| Protocol | PDU | |
| Version | Type | zero |
| Version | Type | zero |
| 2 | 11 | |
+-------------------------------------------+
| |
@ -967,29 +967,41 @@
</artwork>
</figure>
<t>The ASPA PDU is to support <xref
target="I-D.ietf-sidrops-aspa-profile"/>. Receipt of an ASPA
PDU announcement when the router already has an ASPA PDU with
the same Customer Autonomous System Number, replaces the
previous one. This is to avoid a race condition when a BGP
announcement is received between an withdrawn PDU and a new
announced PDU. Therfore, the cache SHOULD deliver entire data
of an ASPA record in a single ASPA PDU.
target="I-D.ietf-sidrops-aspa-profile"/>. An ASPA PDU
represents one single customer AS and zero or more provider ASs
for a particular Address Family. Receipt of an ASPA PDU
announcement when the router already has an ASPA PDU with the
same Customer Autonomous System Number and the same Address
Family (see Flags field), replaces the previous one. This is to
avoid a race condition when a BGP announcement is received
between an withdrawn PDU and a new announced PDU. Therfore, the
cache SHOULD deliver entire data of an ASPA record in a single
ASPA PDU.
</t>
<t>
The lowest-order bit of the Flags field is 1 for an
announcement and 0 for a withdrawal. Withdrawal of a
non-existant or non-matching ASPA PDU is an error.
</t>
<t>
The Provider AS Count is the number of 32-bit Provider
Autonomous System Numbers in the PDU. There may be none.
</t>
<t>
The Flags field is defined as follows:</t>
<figure>
<artwork>
Bit Bit Name
---- -------------------
0 Announce/Withdraw (ann == 0, with == 1)
1 AFI (IPv4 == 0, IPv6 == 1)
3-7 Reserved, must be zero
</artwork>
</figure>
<t>The Provider AS Count is the number of Provider Autonomous
System Number(s) at the end of the PDU, and may be zero or more.
</t>
<t>
The Customer Autonomous System Number is the 32-bit
Autonomous System Number of the customer which signed the
PDU. There may be only one ASPA for a Customer Autonomous
System Number active at any time.
</t>
<t>
The Provider AS Count is the number of 32-bit Provider
Autonomous System Numbers in the PDU. There may be none.
</t>
<t>
There are zero or more 32-bit Provider Autonomous System
Number fields; see <xref