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Updated Protocol Specification Changes from -05 to -06 Draft

This document outlines changes made from -05 to -06 protocol draft, including modifications to fields, security considerations, VLAN configurations, and management statements. It addresses the impact of TRILL enveloping on firewall functionality. Additionally, it covers the update to the pseudo code, VLAN connectivity, and SNMP management. The document also delves into changes related to bridges and RBridges, DRB configurations, and IS-IS frame criteria.

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Updated Protocol Specification Changes from -05 to -06 Draft

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  1. Protocol SpecificationChanges from -05 to -06 Donald Eastlake 3rd +1-508-786-7754 Donald.Eastlake@motorola.com Protocol Draft -05 to -06

  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 |M|Op-Length| Hop Count | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Egress RBridge Nickname | Ingress RBridge Nickname | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Protocol Draft -05 to -06

  3. Change List • 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. • 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. • 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. Protocol Draft -05 to -06

  4. Change List • 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 • Add material noting that replacement of bridges by RBridges can cause connectivity between previously isolated islands of the same VLAN. • Pseudonode Changes as described by Radia. • Add a minimal management by SNMP statement to Section 2. Protocol Draft -05 to -06

  5. Change List • Extensive updates to pseudo code. Was unchanged from -04 in -05. Now up to date and more completed but still needs further work. • 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. • Drop recommendation to set "bridge" flags in some 802.1AB frame fields. • Miscellaneous minor editorial changes. Protocol Draft -05 to -06

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