3com 3CR17451-91 User Manual
16
C
HAPTER
1: I
NTRODUCING
THE
S
UPER
S
TACK
3 S
WITCH
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:
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.
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
Disabled
Broadcast Storm Control
Enabled
High threshold: 3000 broadcast frames per
second — Notify and filter
Low threshold: 1500 broadcast frames per
second — Notify and unfilter
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)
(VLAN 1)
Multicast Filtering
IGMP filtering enabled
Rapid Spanning Tree Protocol
Enabled
Link Aggregation Control
Protocol (LACP)
Protocol (LACP)
Disabled per port
Spanning Tree Protocol
Enabled
Smart Auto-sensing
Enabled
DUA1745-0AAA03.book Page 16 Friday, April 8, 2005 12:34 PM