250
C
HAPTER
30: MSTP C
ONFIGURATION
spanning tree instance on two or more switches using the stp root secondary
command.
■
You can also configure the current switch as the root bridge by setting the
priority of the switch to 0. Note that once a switch is configured as the root
bridge or a secondary root bridge, its priority cannot be modified.
Configuration example
# Configure the current switch as the root bridge of spanning tree instance 1 and
a secondary root bridge of spanning tree instance 2.
<SW7750> system-view
[SW7750] stp instance 1 root primary
[SW7750] stp instance 2 root secondary
Bridge Priority
Configuration
Root bridges are selected by the bridge priorities of switches. You can make a
specific switch being selected as a root bridge by set a higher bridge priority for
the switch (Note that a smaller bridge priority value indicates a higher bridge
priority.) A MSTP-enabled switch can have different bridge priorities in different
spanning tree instances.
Configuration procedure
c
CAUTION:
■
Once you specify a switch as the root bridge or a secondary root bridge by
using the stp root primary or stp root secondary command, the bridge priority
of the switch is not configurable.
■
During the selection of the root bridge, if multiple switches have the same
bridge priority, the one with the least MAC address becomes the root bridge
candidate.
Configuration example
# Set the bridge priority of the current switch to 4,096 in spanning tree instance 1.
<SW7750> system-view
[SW7750] stp instance 1 priority 4096
MSTP Operation Mode
Configuration
A MSTP-enabled switch can operate in one of the following operation modes:
■
STP-compatible mode: In this mode, the protocol packets sent out of the ports
of the switch are STP packets. If the switched network contains STP-enabled
switches, you can configure the current MSTP-enabled switch to operate in this
mode by using the
stp mode stp
command.
■
RSTP-compatible mode: In this mode, the protocol packets sent out of the
ports of the switch are RSTP packets. If the switched network contains
Table 175
Assign a bridge priority to a switch
Operation Command
Description
Enter system view
system-view
-
Set a bridge priority
for the current switch
stp
[
instance
instance-id
]
priority
priority
Required
The default bridge priority of a
switch is 32,768.
Summary of Contents for Switch 7754
Page 32: ...32 CHAPTER 1 CLI OVERVIEW ...
Page 70: ...70 CHAPTER 5 LOGGING IN USING MODEM ...
Page 76: ...76 CHAPTER 7 LOGGING IN THROUGH NMS ...
Page 86: ...86 CHAPTER 9 CONFIGURATION FILE MANAGEMENT ...
Page 120: ...120 CHAPTER 13 ISOLATE USER VLAN CONFIGURATION ...
Page 126: ...126 CHAPTER 14 SUPER VLAN ...
Page 136: ...136 CHAPTER 16 IP PERFORMANCE CONFIGURATION ...
Page 152: ...152 CHAPTER 17 IPX CONFIGURATION ...
Page 164: ...164 CHAPTER 19 QINQ CONFIGURATION ...
Page 172: ...172 CHAPTER 21 SHARED VLAN CONFIGURATION ...
Page 182: ...182 CHAPTER 22 PORT BASIC CONFIGURATION ...
Page 198: ...198 CHAPTER 24 PORT ISOLATION CONFIGURATION ...
Page 208: ...208 CHAPTER 25 PORT SECURITY CONFIGURATION ...
Page 224: ...224 CHAPTER 27 DLDP CONFIGURATION ...
Page 232: ...232 CHAPTER 28 MAC ADDRESS TABLE MANAGEMENT ...
Page 240: ...240 CHAPTER 29 CENTRALIZED MAC ADDRESS AUTHENTICATION CONFIGURATION ...
Page 280: ...280 CHAPTER 30 MSTP CONFIGURATION ...
Page 348: ...348 CHAPTER 35 IS IS CONFIGURATION ...
Page 408: ...408 CHAPTER 39 802 1X CONFIGURATION ...
Page 412: ...412 CHAPTER 40 HABP CONFIGURATION ...
Page 422: ...422 CHAPTER 41 MULTICAST OVERVIEW ...
Page 426: ...426 CHAPTER 42 GMRP CONFIGURATION ...
Page 480: ...480 CHAPTER 47 PIM CONFIGURATION ...
Page 506: ...506 CHAPTER 48 MSDP CONFIGURATION ...
Page 552: ...552 CHAPTER 51 TRAFFIC ACCOUNTING CONFIGURATION ...
Page 570: ...570 CHAPTER 53 HA CONFIGURATION ...
Page 582: ...582 CHAPTER 54 ARP CONFIGURATION SwitchA arp protective down recover interval 200 ...
Page 622: ...622 CHAPTER 58 DHCP RELAY AGENT CONFIGURATION ...
Page 684: ...684 CHAPTER 61 QOS CONFIGURATION ...
Page 718: ...718 CHAPTER 63 CLUSTER ...
Page 738: ...738 CHAPTER 67 UDP HELPER CONFIGURATION ...
Page 752: ...752 CHAPTER 69 RMON CONFIGURATION ...
Page 772: ...772 CHAPTER 70 NTP CONFIGURATION ...
Page 796: ...796 CHAPTER 72 FILE SYSTEM MANAGEMENT ...
Page 802: ...802 CHAPTER 73 BIMS CONFIGURATION ...
Page 814: ...814 CHAPTER 74 FTP AND TFTP CONFIGURATION ...
Page 830: ...830 CHAPTER 75 INFORMATION CENTER ...
Page 836: ...836 CHAPTER 76 DNS CONFIGURATION ...
Page 852: ...852 CHAPTER 77 BOOTROM AND HOST SOFTWARE LOADING ...
Page 858: ...858 CHAPTER 78 BASIC SYSTEM CONFIGURATION DEBUGGING ...