Cisco CATALYST 1924 ENTERPRISE SWITCH Specification Guide
Supported Software Features
Catalyst 2820 Series and Catalyst 1900 Series Enterprise Edition Software Configuration Guide
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Supported Software Features
Catalyst 2820 and Catalyst 1900 Enterprise Edition software supports these features:
•
VLANs
•
Fast EtherChannel
•
Spanning-Tree Protocol UplinkFast
•
Terminal Access Controller Access Control System Plus (TACACS+)
•
Configuration File Upload/Download
VLANs
A VLAN on a Catalyst 2820 or Catalyst 1900 switch is an administratively defined
broadcast domain. Stations can receive only broadcast and multicast packets sent by other
stations in the same VLAN. A VLAN enhances performance by limiting traffic; it allows
the transmission of traffic among stations that belong to it and blocks traffic from other
stations in other VLANs. Using the Enterprise Edition software you can configure from
1 to 1005 VLANs.
broadcast domain. Stations can receive only broadcast and multicast packets sent by other
stations in the same VLAN. A VLAN enhances performance by limiting traffic; it allows
the transmission of traffic among stations that belong to it and blocks traffic from other
stations in other VLANs. Using the Enterprise Edition software you can configure from
1 to 1005 VLANs.
The VLAN feature consists of the following components:
VLAN Trunks
Extends VLANs from one Catalyst 2820 or Catalyst
1900 switch to routers and switches that are
VLAN-capable. The Catalyst 2820 and Catalyst 1900
switches support a maximum of two trunks. The
Catalyst 1900 switch supports a maximum of two Fast
Ethernet Inter-Switch Link (ISL) trunks. The
Catalyst 2820 switch supports both ISL and
Asynchronous Transfer Mode (ATM) LAN emulation
(LANE) trunk connections and ATM permanent virtual
connections (PVCs).
1900 switch to routers and switches that are
VLAN-capable. The Catalyst 2820 and Catalyst 1900
switches support a maximum of two trunks. The
Catalyst 1900 switch supports a maximum of two Fast
Ethernet Inter-Switch Link (ISL) trunks. The
Catalyst 2820 switch supports both ISL and
Asynchronous Transfer Mode (ATM) LAN emulation
(LANE) trunk connections and ATM permanent virtual
connections (PVCs).
Load Sharing
Allows parallel trunks to split traffic on a
VLAN-by-VLAN basis between multiple trunks.
VLAN-by-VLAN basis between multiple trunks.