Features at a glance, Layer 2 features, Layer 3 features – Cisco 4948 User Manual
Page 4
© 2005 Cisco Systems, Inc. All rights reserved.
Important notices, privacy statements, and trademarks of Cisco Systems, Inc. can be found on cisco.com.
Page 4 of 14
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