Foundry Networks
Page 1 of 70
Configuring Multiple Spanning Tree
Protocol (MSTP)
This chapter describes how to configure the Multiple Spanning Tree Protocol (MSTP). The chapter
focuses on a spanning-tree instance called MST-Instance (MSTI), Fast Ring mode and the other
important aspects of this protocol. MSTP commands and examples are presented. The chapter
consists of the following sections:
TABLE OF FIGURES .................................................................................................................................... 2
OVERVIEW .................................................................................................................................................... 3
M
ULTIPLE
S
PANNING
-T
REE
R
EGIONS
........................................................................................................... 3
MST-
TO
-SST
I
NTEROPERABILITY
................................................................................................................. 6
MST
I
NSTANCES
........................................................................................................................................... 7
I
NTEROPERABILITY WITH
802.1D
STP .......................................................................................................... 9
F
AST
R
ING
M
ODE
.......................................................................................................................................... 9
S
PANNING
T
REE
IGMP
F
AST
R
ECOVERY
.................................................................................................... 13
C
ISCO
C
OMPLIANCE
.................................................................................................................................... 14
B
ENEFITS
..................................................................................................................................................... 19
P
REREQUISITES
........................................................................................................................................... 20
MSTP
C
ONFIGURATION
F
LOW
.................................................................................................................... 20
MSTP
D
EFAULT
C
ONFIGURATION
.............................................................................................................. 21
C
ONFIGURING AND
D
ISPLAYING
MSTP ...................................................................................................... 23
C
ONFIGURING
G
LOBAL
MSTP
P
ARAMETERS
.............................................................................................. 24
C
ONFIGURING
MSTI
P
ARAMETERS
............................................................................................................. 29
C
ONFIGURING THE
MSTP
I
NTERFACE
P
ARAMETERS
................................................................................... 30
D
ISPLAYING
MSTP
C
ONFIGURATION
.......................................................................................................... 38
D
EBUGGING
MSTP ..................................................................................................................................... 45
C
ONFIGURATION
E
XAMPLES
....................................................................................................................... 46
ACRONYMS ................................................................................................................................................. 68
SUPPORTED PLATFORMS....................................................................................................................... 70
S
UPPORTED
S
TANDARDS
,
MIB
S AND
RFC
S
................................................................................................ 70