blocked link … 4-12 blocked port … 4-10 broadcast storm … 4-3 enabling MSTP … 4-40

MSTP

See spanning-tree, 802.1s VLAN effect on … 2-55

spanning-tree

config-name … 4-43config-revision … 4-43 instance vlan … 4-42,4-43root-history … 4-58

spanning-tree, 802.1s … 4-4,4-6 802.1D and 802.1w connections … 4-16 802.1D as a region … 4-13,4-16 802.1Q VLANs … 4-12

802.1s standard-compliant … 4-6

802.1w as a region … 4-13 active path … 4-10 active paths … 4-15 bandwidth loss … 4-12 benefit … 4-6

blocked traffic … 4-11

boundary port, region … 4-14,4-15 boundary port, VLAN membership … 4-11 BPDU … 4-11,4-19,4-22,4-23,4-27 BPDU requirement … 4-14

BPDU, function … 4-14 bridge … 4-14

bridge, designated for region … 4-14 caution … 4-6,4-9

CIST … 4-8,4-13,4-15

CIST per-port hello time … 4-15 CIST root … 4-27

CIST root, display change history … 4-58common and internal spanning tree

See CIST. common spanning tree

See CST. compatibility … 4-16 compatibility mode … 4-22 configuration … 4-21,4-40 configuration identifier … 4-14 configuration steps … 4-19 configuration, BPDU port protection … 4-30 configuration, exchanging … 4-40 configuration, MST instance … 4-35 configuration, MSTI per-port … 4-37

configuration, port … 4-26 CST … 4-8,4-11,4-13

CST and legacy devices … 4-11 CST, view status … 4-51,4-52

debug, display counters … 4-61,4-62,4-64 default configuration … 4-9 designated bridge … 4-11,4-14 designated port … 4-11

disabling MSTP … 4-40

display statistics and configuration … 4-49 dynamic VLANs, disallowed … 4-9

edge port … 4-26 enabling a region … 4-40 enabling MSTP … 4-40

example of multiple topologies … 4-10 fault tolerance … 4-6

force protocol version … 4-16forward-delay … 4-23 forwarding paths … 4-16 forwarding state … 4-26

frame duplication and misordering … 4-16 general operation … 4-4,4-6

GVRP … 4-8,4-15

hello-time, CIST root, propagated … 4-15,4-23hello-time, override … 4-15

hello-time, propagated … 4-15hop-count decremented … 4-23 instance … 4-4,4-15,4-20

instance, display debug counters … 4-61,4-62,4-64

instance, forwarding topology … 4-16 instance, IST … 4-8

instance, type … 4-8internal spanning tree

See IST.

interoperating with 802.1D and 802.1w … 4-13 IST … 4-8

IST instance … 4-8,4-35,4-44 IST root … 4-8,4-10,4-14

IST root, display change history … 4-58 IST, defined … 4-13

IST, dynamic VLAN … 4-15 IST, root switch … 4-13

IST, switch membership … 4-13 IST, VLAN membership … 4-8 legacy devices and the CST … 4-11 legacy STP and RSTP … 4-11 mesh environment … 4-6,4-16

4 – Index