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March 2008 Protocol Draft Changes -06 to -07 1
TRILL Protocol Specification
Changes from -06 to -07Donald Eastlake 3rd
+1-508-786-7554
March 2008 Protocol Draft Changes -06 to -07 2
Editorial Changes
1. Fix a few cases where hop count was off by 1.
2. Replace remaining Q-tag references with C-tag.
3. Add a few frame type definitions (Section 1.2) and a list of acronyms (new Section 10).
4. Re-order some sub-sections.
5. Make figure numbers section relative and add table numbers.
March 2008 Protocol Draft Changes -06 to -07 3
From Vancouver1. Remove Pseudo-node suppression material.2. Add ability to configure a port to drop native
frames and not send native frames (i.e., no end station support).
3. Permit Rbridges to implement GVRP/MVRP (see also technical changes slide).
4. Add note that difficulties in determining link speed when there are intervening boxes is not unique to Rbridges.
5. Drop recommendation to set “bridge” flags in some 802.1AB fields. (actually from Chicago but accidentally omitted in -06)
March 2008 Protocol Draft Changes -06 to -07 4
Expansions / Pseudo-Code
1. Add Section 4.8 giving a more detailed exposition of multipathing.
2. Add Section 2.5 comparing zero configuration 802.1D, 802.1Q, and Rbridges.
3. Added note to Security Considerations to use care when using VLANs for security.
4. Pseudo-Code (Section 5) has been partially updated.
March 2008 Protocol Draft Changes -06 to -07 5
Technical Changes
1. IEEE 802.1 VLAN registration protocols (either the older GVRP or newer MVRP) didn’t work. Added Section 4.7 which goes about 75% of the way to making MVRP (Multiple VLAN Registration Protocol, 802.1ak) work so that Rbridges can incrementally replace 802.1Q customer bridges where either the replaced or remaining bridges have ports with dynamically registered VLANs.
2. Options – see next slide.
March 2008 Protocol Draft Changes -06 to -07 6
Options
• For discussion purposes and to provide some examples– The protocol-07 draft specifies only summary
hop-by-hop and ingress-to-egress critical options present bits.
– Individual draft -rbridge-options-00 specifies:• A fairly complete options syntax and• A number of specific options.
