Configuration Guide

Table Of Contents
©2021 Extreme Networks, Inc. All rights reserved
October 2021
88
18. IS-IS TLV
SPB uses IS-IS TLV (Type Length Value) and sub TLVs parameters to carry information in Link State
Advertisements to other SPB enabled bridges including SPB services as shown in the table below
TLV Description Usage
1
Area Addresses IS-IS area
3
End System Neighbors B-MAC & SysName of itsself
22 Extended IS Reachability IS-IS adjacencies
Sub-TLV 29: Link Metric for SPBM alone
129 Protocol Supported SPBM
135 TE IP Reachability IP Reachability for IP Shortcuts in GRT
137 Host Name ISIS router name
236 IPv6 Reachability IP Reachability for IPv6 shortcuts in GRT
143 SPBM Instance & BVIDs Sub-TLV 6: BVIDs to ECT algorithm
Used in IS-IS Hellos only
144
SPBM Instance, Nick-name,
BVLANs & ISIDs
Sub-TLV 1: SPBM Instance & Nick-name
Sub-TLV 3: B-VLANs & L2VSN ISIDs
184 SPBM IPVPN Reachability IP Reachability for L3 VSNs
185 SPBM ISID Constrained
Source-Groups
IP Multicast stream availability for
L2VSNs & L3VSNs
186 SPBM VRF-Opera/GRT
Source-Groups
IP Multicast stream availability for GRT/VRF-0
236 IPv6 Reachability IP Reachability for IPv6 Shortcuts in GRT
Table 11: ISIS TLV’s
TLVs 1,3,22,129 & 135 are well known IS-IS TLVs which exited even before SPB was
defined
TLVs 143 & 144 are new IS-IS TLVs defined for use by SPB
TLVs 184, 185 & 186 are new IS-IS TLVs defined in Extreme’s IETF draft for SPB IP
extensions