Dell Force10 MXL Blade - Interoperate with Non-FTOS Bridges

Multiple Spanning Tree Protocol (MSTP) | 341
To change the bridge priority, use the following command:
The simple configuration (Figure 19-1) by default yields the same forwarding path for both MSTIs.
Figure 19-5 shows how R3 is assigned bridge priority 0 for MSTI 2, which elects a different root bridge
than MSTI 2.
To view the bridge priority, use the
show config command from PROTOCOL MSTP mode (Figure 19-5).
Figure 19-5. Changing the Bridge Priority
Interoperate with Non-FTOS Bridges
FTOS supports only one MSTP region. A region is a combination of three unique qualities:
• Name is a mnemonic string you assign to the region. The default region name on FTOS is null.
• Revision is a two-byte number. The default revision number on FTOS is 0.
• VLAN-to-instance mapping is the placement of a VLAN in an MSTI.
For a bridge to be in the same MSTP region as another, all three of these qualities must match exactly. The
default values for the name and revision matches on all Dell Force10 FTOS equipment. If you have
non-FTOS equipment that participates in MSTP, ensure these values to match on all the equipment.
Task Command Syntax Command Mode
Assign a number as the bridge priority. A lower number
increases the probability that the bridge becomes the root
bridge.
Range: 0 to 61440, in increments of 4096
Default: 32768
msti instance bridge-priority priority PROTOCOL MSTP
Note: Some non-FTOS equipment may implement a non-null default region name. SFTOS, for example,
uses the Bridge ID, while others may use a MAC address.
FTOS(conf-mstp)#msti 2 bridge-priority 0
FTOS(conf-mstp)#show config
!
protocol spanning-tree mstp
MSTI 2 bridge-priority 0
FTOS(conf-mstp)#