Datasheet
Table Of Contents
- Data Sheet
- Cisco Catalyst 4948-10GE Switch

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INTELLIGENT NETWORK SERVICES WITH QOS AND SOPHISTICATED TRAFFIC MANAGEMENT
The Cisco Catalyst 4948-10GE offers superior per-port quality of service (QoS) features to help ensure that network traffic is classified, prioritized,
and scheduled optimally to efficiently manage bandwidth-hungry multimedia, and time-sensitive and mission-critical applications. The Catalyst
4948-10GE can classify, police, and mark incoming packets, allowing the administrator to differentiate between traffic flows and enforce policies.
Sharing, shaping, and strict-priority configurations determine scheduling of egress traffic. The Catalyst 4948-10GE also supports Dynamic Buffer
Limiting (DBL), a congestion-avoidance feature. For details about the QoS features (including DBL) on the Catalyst 4948-10GE, refer to the QoS on
Cisco Catalyst 4500 Series supervisor engines overview at:
http://www.cisco.com/en/US/products/hw/switches/ps4324/prod_white_papers_list.html
FEATURES AT A GLANCE
Layer 2 Features
• Layer 2 hardware forwarding at 102 mpps
• Layer 2 switch ports and VLAN trunks
• IEEE 802. 1Q VLAN encapsulation
• Inter-Switch Link (ISL) VLAN encapsulation
• Dynamic Trunking Protocol (DTP)
• VLAN Trunking Protocol (VTP) and VTP domains
• Support for 2048 VLANs per switch
• Per-VLAN Spanning Tree (PVST) and PVST Plus (PVST+)
• Spanning-tree PortFast and PortFast guard
• Spanning-tree UplinkFast and BackboneFast
• 802.1s
• 802.1w
• 802.3ad
• Spanning-tree root guard
• Cisco Discovery Protocol versions 1 and 2
• IGMP snooping versions 1, 2, and 3
• Cisco EtherChannel
®
technology, Cisco Fast EtherChannel technology, and Cisco Gigabit EtherChannel technology
• Port Aggregation Protocol (PAgP)
• Link Aggregation Control Protocol (LACP)
• Unidirectional link detection (UDLD) and aggressive UDLD
• 802. 1q-in-802. 1q (QinQ) in hardware
• Layer 2 protocol tunneling
• Multilayer Jumbo Frames (up to 9216 bytes)
• Baby Giants (up to 1600 bytes)
• Unidirectional Ethernet
• Storm control (formally known as broadcast and multicast suppression)
• Forced 10/100 autonegotiation
• Web Content Communication Protocol Version 2 Layer 2 Redirect
• Private VLAN Promiscuous Trunk