14-23
Cisco ME 3800X and 3600X Switch Software Configuration Guide
OL-23400-01
Chapter 14 Configuring MSTP
Configuring MSTP Features
MSTP and Ethernet Flow Points (EFPs)
For MSTP to peer with a neighbor on a port that has an Ethernet Virtual Connection (EVC) EFP service
instance configured, you need to enter the l2 protocol peer stp service-instance configuration command
on the service instance. See the
“Configuring Ethernet Virtual Connections (EVCs)”
chapter for more
information on EFPs.
This example shows how to configure Layer 2 protocol peer on a service instance:
Switch (config)#
interface gigabitethernet0/1
Switch (config-if)#
switchport mode trunk
Switch (config-if)#
switchport trunk allowed vlan none
Switch (config-if)#
service instance
1
Ethernet
Switch (config-if-srv)#
encapsulation untagged
Switch (config-if-srv)#
l2protocol peer stp
Switch (config-if-srv)#
bridge-domain 10
Switch (config-if-srv)#
end
Configuring the Hello Time
You can configure the interval between the generation of configuration messages by the root switch by
changing the hello time.
Note
Exercise care when using this command. For most situations, we recommend that you use the
spanning-tree mst instance-id root primary and the spanning-tree mst instance-id root secondary
global configuration commands to modify the hello time.
Beginning in privileged EXEC mode, follow these steps to configure the hello time for all MST
instances. This procedure is optional.
To return the switch to its default setting, use the no spanning-tree mst hello-time global configuration
command.
Configuring the Forwarding-Delay Time
Beginning in privileged EXEC mode, follow these steps to configure the forwarding-delay time for all
MST instances. This procedure is optional.
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
spanning-tree mst hello-time seconds
Configure the hello time for all MST instances. The hello time
is the interval between the generation of configuration
messages by the root switch. These messages mean that the
switch is alive.
For seconds, the range is 1 to 10; the default is 2.
Step 3
end
Return to privileged EXEC mode.
Step 4
show spanning-tree mst
Verify your entries.
Step 5
copy running-config startup-config
(Optional) Save your entries in the configuration file.
