Multicast Router Discovery draftietfmagmamrdisc00'txt

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Multicast Router Discovery draft-ietf-magma-mrdis
c-00.txt

• Jim Martin
• jim_at_netzwert.ag
• Netzwert AG
• Brian Haberman
• brian_at_innovationslab.net
• Caspian Networks

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History

• Same root protocol as draft-ietf-idmr-igmp-mrdisc-
  10
• Went to IESG in June 2003, several issues were
  raised
• All original authors (other than Brian) moved on
• Updated and issued as a MAGMA document

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Issues

• IESG Issues
• IPv6 and IPv4 not treated equally throughout
• Option format inconsistent with NDP
• Concern about the use of NDP for v6
• Insufficient Security Section
• Use of All-Systems causes extra processing on
  uninterested nodes
• Other problems
• TLV option format overkill for this application
• Easy DoS attack with old Terminate message

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Changes (1 of 2)

• Advertisement/Solicitation/Terminate messages
• Protocol Agnostic
• IGMP for v4
• MLD, not NDP, for v6
• Removed TLV options
• Replaced with fixed Query Interval / Robustness
  fields
• TTL/Hop Limit is consistently 1
• Defined All-Snoopers group

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Changes (2 of 2)

• Terminate now triggers Solicitation rather than
  immediate shutdown of forwarding
• Enhanced security statement
• Identifies risks
• Points at SEND WG for potential solution

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Comments

• Received comments from Pekka Savola and Steffan
  De Cnodder
• Suggestion for name change - add Link Local
• Specify encoding of Query Interval ala IGMP/MLD
• Validate that source address of a received packet
  is subnet-local for the interface.
• Add SEND to informative references
• Specify which section (informative) from which
  the ICMPv6 type codes should be allocated
• Minor typographical problems with constants and
  general editing suggestions
• Last call after minor revision?