Protocol Specification Changes from -05 to -06

1
Protocol Specification Changes from -05 to -06

• Donald Eastlake 3rd
• 1-508-786-7754
• Donald.Eastlake_at_motorola.com

2
Change List

• Change "V" field to be a 2-bit version fields
  followed by 2 reserved bits. Make corresponding
  changes to eliminate the inclusion in the header
  of frame analysis indicating type of
  multi-destination pruning which is proper for
  frame. Make corresponding changes in IANA
  Considerations.
• 
  ----------------
• V R
  MOp-Length Hop Count
• -------------------------
  -------
• Egress RBridge Nickname Ingress
  RBridge Nickname
• -------------------------
  -------

3
Change List

1. The Inner.MacDA for TRILL IS-IS frames is changed
   to a second multicast address All-IS-IS-RBridges.
   IEEE Allocation Considerations, pseudo code,
   etc., are correspondingly changed.
2. Expand Security Considerations by referencing RFC
   3567 (IS-IS Cryptographic Authentication) and
   indicating that TRILL enveloping may reduce the
   effectiveness of TRILL-ignorant firewall
   functionality.
3. Note in Section 6 that bridges can hide slow
   links and make it harder from RBridges to
   determine the cost of an Rbridge to RBridge hop.

4
Change List

1. Change to one DRB per physical link which
   dictates the inter-RBridge VLAN for the link,
   appoints forwarders per VLAN, can be configured
   to send Hellos on multiple VLANs, etc., as
   described by Radia
2. Add material noting that replacement of bridges
   by RBridges can cause connectivity between
   previously isolated islands of the same VLAN.
3. Pseudonode Changes as described by Radia.
4. Add a minimal management by SNMP statement to
   Section 2.

5
Change List

1. Extensive updates to pseudo code. Was unchanged
   from -04 in -05. Now up to date and more
   completed but still needs further work.
2. Note that the IS-IS native frame
   admission/emission criteria are sufficient so
   there is no need for a port to maintain the
   spanning tree state machine. Delete explicit
   requirement to process TRILL frames arriving on a
   port even if the port implements spanning tree
   and is in spanning tree blocked state.
3. Drop recommendation to set "bridge" flags in some
   802.1AB frame fields.
4. Miscellaneous minor editorial changes.