1aq specifies SPB operation details SPB establishes Shortest Path Trees SPTs in order to provide the connectivity for unicast and multicast traffic within a Layer 2 domain Background Shortest Path Bridging SPB brPage 3br ISIS Path Control and Reserva ID: 23184
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IS-IS Path Control and Reservation at L2 draft-farkas-isis-pcr-00 JánosFarkas, Nigel Bragg, Paul Unbehagen, Glenn Parsons, Peter Ashwood-SmithIETF 91 November 14, 2014 IS-IS Path Control and Reservation | IETF 91 | 2014-11-14 | Page 2 SPB is an add-on to IS-IS for the control of Layer 2 networksA few sub-TLVsNo change to the IS-IS protocol SpecificationsRFC 6329 specifies the SPB sub-TLVsIEEE 802.1aq specifies SPB operation details SPB establishes Shortest Path Trees (SPTs) in order to provide the connectivity for unicast and multicast traffic within a Layer 2 domainBackground:Shortest Path Bridging (SPB) IS-IS Path Control and Reservation | IETF 91 | 2014-11-14 | Page 3 Provide IS-IS control beyond Shortest Path Trees (SPTs)for SPB networksAugmenting SPB with non-shortest path capabilitiesSmall diameter and infrequent use caseExtensions to RFC 6329 and IEEE 802.1aq Exception traffic steeringSPT of Edge Bridge (EB) 1is via Core Bridge (CB) 1Explicit Tree (ET) of EB 1 is via CB 2 No protocol changes, only a couple of new sub-TLVs and reuse of existing ones as much as possibleScope of draft-farkas-isis-pcr-00 and P802.1Qca EB3 EB2 CB1 Shortest Path Tree SPB EB1 CB2 IS-IS Path Control and Reservation | IETF 91 | 2014-11-14 | Page 4 L2 multicast trees that each node participates, e.g. for BUM An Explicit Tree (ET) is either strict or loose Strict treespecifies all bridges and links it compriseseach hop is a strict hop Loose treeonly specifies the bridges that have special role traffic end point root leaf bridge to be avoidedno path or path segment specifiedeach hop is a loose hopExplicit Trees IS-IS Path Control and Reservation | IETF 91 | 2014-11-14 | Page 5 Existing sub-TLVs are reused as much as possibleSPB Base VLAN-Identifiers sub-TLVMT Capability sub-TLV SPB Instance sub-TLV SPBV MAC address sub-TLV SPBM Service Identifier and Unicast Address sub-TLV New sub-TLVs are conveyed by MT Capability sub-TLVTopology sub-TLV Hop sub-TLV Bandwidth Constraint sub-TLV Bandwidth Assignment sub-TLVsub-TLVs RFC 6329 draft-farkas-isis-pcr-00 IS-IS Path Control and Reservation | IETF 91 | 2014-11-14 | Page 6 Enhance SPB with control of Explicit Trees, i.e. beyond SPTs No change or impact on IETF protocols IS-IS is used as by SPB Embedded to existing TLVs and algorithmsReuse of sub-TLVs specified by RFC 6329Maximally Redundant Trees for Fast Reroute Very few new sub-TLVs by draft-farkas-isis-pcr-00 Operation details by IEEE 802.1QcaSummary