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Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 7 Configuring Spanning Tree
Configuring Spanning-Tree Timers on the Switch
Configuring the Hello Time
Enter the
set spantree hello
command to change the hello time for a VLAN, an MISTP instance, or on
a per-port basis. The possible range of
interval
is 1–10 seconds.
To configure the spanning-tree bridge hello time for a VLAN or an MISTP instance, perform this task
in privileged mode:
This example shows how to configure the spanning-tree hello time for VLAN 100 to 7 seconds:
Console> (enable)
set spantree hello 7 100
Spantree 100 hello time set to 7 seconds.
Console> (enable)
This example shows how to configure the spanning-tree hello time for an instance to 3 seconds:
Console> (enable)
set spantree hello 3 mistp-instance 1
Spantree 1 hello time set to 3 seconds.
Console> (enable)
This example shows how to configure the spanning-tree hello time for port 4/5 to 4 seconds:
Console> (enable)
set spantree hello 4 mst 4/1
MST hello time set to 4 on port 4/1.
Console> (enable)
Configuring the Forward Delay Time
Enter the
set spantree fwddelay
command to configure the spanning-tree forward delay time for a
VLAN. The possible range of
delay
is 4–30 seconds.
To configure the spanning-tree forward delay time for a VLAN, perform this task in privileged mode:
This example shows how to configure the spanning-tree forward delay time for VLAN 100 to
21 seconds:
Console> (enable)
set spantree fwddelay 21 100
Spantree 100 forward delay set to 21 seconds.
Console> (enable)
This example shows how to set the bridge forward delay for an instance to 16 seconds:
Task
Command
Step 1
Configure the hello time for a VLAN or an
MISTP instance.
set spantree hello
interval
{[
vlan
] |
mistp-instance
[
instances
] |
mst
[
mod
/
port
]}
Step 2
Verify the configuration.
show spantree
[
vlan
|
mistp-instance
instances
]
Task
Command
Step 1
Configure the forward delay time for a VLAN or
an MISTP instance.
set spantree fwddelay
delay
[
vlan
]
mistp-instance
[
instances
]
Step 2
Verify the configuration.
show spantree
[
mod/port
]
mistp-instance
[
instances
] [
active
]
