14.
Multiple Spanning Tree Protocol (MSTP)
MN700004 Rev 01
176
01/01/13 128 Designat frwrd 200000 200000 32768.00A01211227A 128.013
MST01
VLAN mapped
= 1
Regional Root
= 32769.00:A0:12:11:07:08
RemainingHopCount
= 39
TopChanges
= 4
====================================================================
Port |Pri|Prt role|State|PCost |DCost |Designated bridge |DPrt
--------+---+--------+-----+------+------+------------------+-------
01/01/01 0 Root frwrd 200000 0 32768.00A01211227A 128.001
01/01/10 128 Boundary frwrd 200000 0 32768.00A01211227A 128.010
01/01/13 128 Designat frwrd 200000 0 32768.00A01211227A 128.013
Network Configuration
In the following example, four Nokia ESB26 switches are interconnected via VLANs V100
and V200 that are mapped to two MST instances on each switch. The example shows how
redundancy is achieved with MSTP Figure 14-3 displays the connections schematically.
After configuring the network, the
show mstp
command is used on each switch to verify that
the MST instances are configured correctly.
Figure 14-3 Schematic MSTI Configuration
Configuring Switch 1:
1. Create VLANs V100 and V200 and add the appropriate ports to each VLAN:
device-name
#
configure terminal
device-name
(config)#
vlan
device-name
(config vlan)#
config default
device-name
(config-vlan default)#
remove ports 1/1/1-1/1/3
device-name
(config-vlan default)#
exit
device-name
(config vlan)#
create v100 100
device-name
(config vlan)#
config v100
device-name
(config-vlan v100)#
add ports 1/1/1,1/1/3 tagged
device-name
(config-vlan v100)#
add ports 1/1/10 untagged
device-name
(config-vlan default)#
exit