Cisco Catalyst 4948 Datasheet page 5

IEEE 802.1 QinQ in hardware
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Layer 2 protocol tunneling
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Multilayer jumbo frames (up to 9216 bytes)
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Baby giants (up to 1600 bytes)
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Unidirectional Ethernet
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Storm control (formally known as broadcast and multicast suppression)
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Community private VLANs (PVLANs)
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Forced 10/100 autonegotiation
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Web Content Communication Protocol (WCCP) Version 2 Layer 2 redirect
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Private VLAN promiscuous trunk
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Layer 2 promiscuous trunk over trunk port (L2PT)
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Class-of-service (CoS) mutation
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E-OAM 802.3ah and CFM: 802.1ag
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Layer 3 Features
Jumbo frames on all ports (up to 9216 bytes)
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Hardware-based IP Cisco Express Forwarding routing at 102 mpps
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IP routing protocols: EIGRP, OSPF, RIP, and RIP2
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BGP4 and Multicast Border Gateway Protocol (MBGP)
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Nonstop Forwarding (NSF) awareness
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Hot Standby Router Protocol (HSRP) v1 and v2
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Software routing of Internetwork Packet Exchange (IPX) and AppleTalk
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IS-IS routing protocol
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IGMPv1, v2, and v3
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IGMP filtering on access and trunk ports
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IP Multicast routing protocols: PIM, SSM, and Distance Vector Multicast Routing Protocol (DVMRP)
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Auto rendezvous point (Auto-RP)
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Pragmatic General Multicast (PGM)
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Cisco Group Multicast Protocol server
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Full Internet Control Message Protocol (ICMP) support
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ICMP Router Discovery Protocol
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Policy-based routing (PBR)
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Virtual Route Forwarding lite (VRF-lite)
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VRF-aware IP services
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IPv6 (software switched)
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OSPF fast convergence
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OSPF and EIGRP fast-convergence protection
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EIGRP stub
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Virtual Router Redundancy Protocol (VRRP)
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IP unnumbered for SVI
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© 2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
Data Sheet
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