1-3
Catalyst 4900 Series Switch Installation Guide
78-18039-02
Chapter 1 Product Overview
Catalyst 4948 Switch Software Features
Figure 1-3 Catalyst 4928-10GE Switch
The Catalyst 4928-10GE switch has a 48-Gbps, nonblocking, full-duplex
switching fabric, providing 102 million packets-per-second of switching capacity
for high-speed applications. The Catalyst
4928-10GE chassis has 28 1000BASEX
SFP ports, and two X2 10-Gigabit Ethernet uplink ports.
All three switches have a removable automatic variable speed fan tray for low
noise operation at room temperature and removable and redundant 300
W AC or
300
W DC power supply provides fault-tolerance protection for the switch. See
the
“Connecting AC Power to the Switch” section on page 3-9.
Catalyst 4948 Switch Software Features
The following is an overview of Catalyst 4948 features:
• Layer 2, Layer 3, and Layer 4 switching services
• Support for 32,768 MAC addresses for Layer 2 switching
• Support for 2,048 VLANs and 4,096 VLAN IDs
–
IEEE 802.1Q VLAN tagging on all ports
–
Q-in-Q for EFM
–
Cisco Inter Switch Link (ISL) tagging on all ports
• 16,000 multicast forwarding entries and 16,000 unicast forwarding entries
• 512 ingress policers and 512 egress policers
• 8,000 ingress Security ACEs (Access Control Entries) and 8,000 egress
Security ACEs
• Support for port aggregation using Port Aggregation Protocol (PAgP) for
Gigabit EtherChannel
271710
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