Cisco 4948-10GE - Catalyst Switch Fiche technique - Page 4
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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/partner/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
Layer 3 Features
Hardware-based IP Cisco Express Forwarding routing at 102 mpps
IP routing protocols: EIGRP, OSPF, RIP, and RIP2
BGP4 and Multicast Border Gateway Protocol (MBGP)
Nonstop Forwarding awareness
Hot Standby Router Protocol (HSRP)
Software routing of Internetwork Packet Exchange (IPX) and AppleTalk
IS-IS routing protocol
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com.
© 2005 Cisco Systems, Inc. All rights reserved.
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