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18 CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 3870
Some combinations of stacked 24 and 48 port units restrict the number
of modules supported by the stack. Table 5
shows which stack
configurations restrict the number of supported modules:
Table 5 Maximum Stack Configurations
Default Settings Table 6 shows the default settings for the Switch 3870. If you initialize
one of the Switch units, it is returned to these defaults.
Table 6 Default Settings
Type of Unit Total Units in the Stack Maximum Modules
48 Port 24 Port
0 8 8 8
8 0 8 0
7 1 8 2
7 0 7 4
6 2 8 4
6 1 7 6
6 0 6 6
Feature Switch 3870
Port Status Enabled
Port Speed Auto-negotiated
Duplex Mode Auto-negotiated
Flow Control Auto-negotiated
Broadcast Storm Control Enabled
High threshold: 3000 broadcast frames per
second — Notify and filter
Low threshold: 1500 broadcast frames per
second — Notify and unfilter
Virtual LANs (VLANs) All ports belong to the untagged Default VLAN
(VLAN 1)
Multicast Filtering IGMP filtering enabled
Rapid Spanning Tree Protocol Enabled
DUA1745-0AAA02.book Page 18 Monday, August 9, 2004 11:51 AM