Configuring Stp For Use In A Cascaded Stack - Cisco Catalyst 2950 Software Configuration Manual

Configuring Spanning-Tree Features

Configuring STP for Use in a Cascaded Stack

STP uses default values that can be reduced when configuring your switch in cascaded configurations.
If a root switch is part of a cluster that is one switch from a cascaded stack, you can customize spanning
tree to reconverge more quickly after a switch failure.
stacks that use the GigaStack GBIC.
acceptable for these configurations.
Table 10-4 Default and Acceptable STP Parameter Settings (in seconds)
STP Parameter STP Default
Hello Time 2
Max Age 20
Forwarding Delay 15
Figure 10-4 Gigabit Ethernet Stack
Catalyst 2950
switches
Option 1:
standalone
cascaded
cluster
Catalyst 2950 Desktop Switch Software Configuration Guide
10-20
Acceptable for Option 1 Acceptable for Option 2
1
6
4
Catalyst 3550
series switch
Catalyst
2950
6000 series
switches
backbone
Catalyst 6000
Option 2:
cascaded
cluster connected to
a Layer 2 backbone
Figure 10-4
Table 10-4 shows the default STP settings and those that are
1
10
7
Catalyst 2950
switches
Catalyst
3550 or
switch
Option 3:
cascaded
cluster connected to
a Layer 3 backbone
Chapter 10 Configuring STP
shows switches in three cascaded
Acceptable for Option 3
1
6
4
Cisco 7000
router
Layer 3
backbone
Cisco 7000
router
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