draft-ietf-pim-join-attributes-04.txt   draft-ietf-pim-join-attributes-05.txt 
PIM WG Arjen Boers PIM WG Arjen Boers
Internet Draft IJsbrand Wijnands Internet Draft IJsbrand Wijnands
Intended Status: Proposed Standard Eric C. Rosen Intended Status: Proposed Standard Eric C. Rosen
Expires: December 30, 2008 Cisco Systems, Inc. Expires: January 28, 2009 Cisco Systems, Inc.
June 30, 2008 July 28, 2008
The PIM Join Attribute Format The PIM Join Attribute Format
draft-ietf-pim-join-attributes-04.txt draft-ietf-pim-join-attributes-05.txt
Status of this Memo Status of this Memo
By submitting this Internet-Draft, each author represents that any By submitting this Internet-Draft, each author represents that any
applicable patent or other IPR claims of which he or she is aware applicable patent or other IPR claims of which he or she is aware
have been or will be disclosed, and any of which he or she becomes have been or will be disclosed, and any of which he or she becomes
aware will be disclosed, in accordance with Section 6 of BCP 79. aware will be disclosed, in accordance with Section 6 of BCP 79.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that Task Force (IETF), its areas, and its working groups. Note that
skipping to change at page 4, line 49 skipping to change at page 4, line 49
1 Encoded-Source address, as well as whatever specific attributes are 1 Encoded-Source address, as well as whatever specific attributes are
in use. in use.
3.2. The Join Attribute Option in the PIM Hello 3.2. The Join Attribute Option in the PIM Hello
To ensure that a type 1 Encoded-Source Address is not sent to a PIM To ensure that a type 1 Encoded-Source Address is not sent to a PIM
neighbor that does not understand this encoding, a new PIM Hello neighbor that does not understand this encoding, a new PIM Hello
option, the "Join Attribute" option, is defined. This option must be option, the "Join Attribute" option, is defined. This option must be
included in the PIM Hello's of any PIM router that is willing to included in the PIM Hello's of any PIM router that is willing to
receive type 1 Encoded-Source Address. A PIM router MUST NOT send a receive type 1 Encoded-Source Address. A PIM router MUST NOT send a
type 1 Encoded-Source Address to any PIM neighbor that has not type 1 Encoded-Source Address out any interface on which there is a
included this option in its Hellos. PIM neighbor that has not included this option in its Hellos. (Even
a router which is not the upstream neighbor must be able parse the
packet in order to do Join suppression or overriding.)
Note that a PIM router that sends the "Join Attribute" Hello option Note that a PIM router that sends the "Join Attribute" Hello option
does not necessarily understand every possible attribute type. As does not necessarily understand every possible attribute type. As
there is no immediate way to act on a neighbor's inability to process there is no immediate way to act on a neighbor's inability to process
certain attribute types, it is not desired to have a hello option for certain attribute types, it is not desired to have a hello option for
each possible attribute type. each possible attribute type.
3.3. Receiving Join Attributes 3.3. Receiving Join Attributes
3.3.1. General Considerations 3.3.1. General Considerations
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