Features and Benefits
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Feature
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Benefit
|
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Outstanding Scalability
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17.5 MB shared buffers
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Large buffers for microburst and high traffic control
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Up to 320 Gbps and 250 mpps wire-speed performance with low latency
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Delay-sensitive traffic forwarded without interruption
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Wire-speed uplinks
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Elimination of oversubscription bottlenecks between downlinks and uplinks across the switch with any combination of half cards
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Configuration Flexibility
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Choice of Gigabit Ethernet and 10 Gigabit Ethernet interfaces
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Granular configuration options for all—Gigabit Ethernet to 10 Gigabit Ethernet transition
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Choice of copper or fiber 1G/10G Ethernet interfaces
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Mix and match 1G/10G RJ-45 and X2 line cards
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Online insertion and removal of cards
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In-service line card changes
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Cisco TwinGig Converter Module support*
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Gigabit Ethernet and 10 Gigabit Ethernet interface support on the same card
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|
Dual AC or DC power
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High availability for nonstop operation
|
|
Investment Protection
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|
Modular half slots
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Migration to new media types through additional half cards
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Field-replaceable power supplies and hot-swappable removable fan
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Extended longevity of hardware
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Use of existing software
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Consistent operational model for all Cisco Catalyst 4900 Series Switches
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* Supported only on 8-port (2:1) 10 Gigabit Ethernet (X2) half card.
Cisco Catalyst 4900M Configuration Options
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Configuration
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10 Gigabit Ethernet (X2) Ports
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1/10 Gigabit Ethernet (10GBASE-T) Ports
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10/100/1000 Ports
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Gigabit Ethernet (Small Form-Factor Pluggable [SFP]) Ports Using TwinGig Converter Module
|
|
10/100/1000 access with 10 Gigabit Ethernet uplinks
|
8
|
0
|
40
|
0
|
|
10/100/1000 and 10 Gigabit Ethernet access with 10 Gigabit Ethernet uplinks
|
12 or 16
|
0
|
20
|
0
|
|
Gigabit Ethernet (SFP) access with 10 Gigabit Ethernet uplinks
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8
|
0
|
0
|
32
|
|
Gigabit Ethernet (SFP) and 10 Gigabit Ethernet access with 10 Gigabit Ethernet uplinks
|
12 or 16
|
0
|
0
|
16
|
|
10 Gigabit Ethernet access (X2) with 10 Gigabit Ethernet uplinks
|
16 or 24
|
0
|
0
|
0
|
|
Gigabit Ethernet (SFP) and 10/100/1000 access with 10 Gigabit Ethernet uplinks
|
8
|
0
|
20
|
16
|
|
10 Gigabit Ethernet access (10GBASE-T) with 10 Gigabit Ethernet Uplinks
|
8
|
16
|
0
|
0
|
|
10/100/1000 and 10 Gigabit (10GBASE-T) Ethernet access with 10 Gigabit Ethernet uplinks
|
8
|
8
|
20
|
0
|
|
10 Gigabit (10GBASE-T) and 10 Gigabit (X2) Ethernet access with 10 Gigabit Ethernet uplinks
|
12 or 16
|
8
|
0
|
0
|
|
10 Gigabit (10GBASE-T) and Gigabit Ethernet (SFP) access with 10 Gigabit Ethernet uplinks
|
8
|
8
|
0
|
16
|
Software Configuration Options for the Cisco Catalyst 4900M Switch
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Software Image
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Description
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|
IP Base image
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Standard Layer 3 image, including Routing Information Protocol Version 1 (RIPv1), RIPv2, static routes, and Enhanced Interior Gateway Routing Protocol (EIGRP) stub
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Enterprise Services image
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Enhanced Layer 3 image, including Open Shortest Path First (OSPF), EIGRP, and Border Gateway Protocol (BGP); also includes all IP Base image features
|
Layer 2 Features
● Layer 2 switch ports and VLAN trunks
● IEEE 802.1Q VLAN encapsulation
● Dynamic Trunking Protocol (DTP)
● VLAN Trunking Protocol (VTP) and VTP domains
● VTP pruning
● VTPv3
● Port security on trunk port
● Q-in-Q passthrough
● Support for 4096 VLANs per switch
● PVST+ and Per-VLAN Rapid Spanning-Tree Protocol (PVRST)
● Spanning Tree PortFast and PortFast guard
● Spanning Tree UplinkFast and BackboneFast
● IEEE 802.1s
● IEEE 802.1w
● IEEE 802.3ad
● Spanning Tree root guard
● Cisco Discovery Protocol
● Internet Group Management Protocol (IGMP) versions 1, 2, and 3 snooping
● IPv6 Multicast Listener Discovery (MLD) snooping
● Cisco EtherChannel technology, Cisco Fast EtherChannel technology, and Cisco Gigabit EtherChannel technology across half cards and base unit
● Port Aggregation Protocol (PAgP)
● Link Aggregation Control Protocol (LACP)
● Unidirectional link detection (UDLD) and aggressive UDLD
● Jumbo frames (up to 9216 bytes)
● Baby Giants (up to 1600 bytes)
● Storm control (formally known as broadcast and multicast suppression)
● Forced 10/100 autonegotiation
● Bridge protocol data unit (BPDU) guard
● FlexLink and FlexLink with VLAN Load Balancing
● IEEE 802.1ab Link Layer Discovery Protocol (LLDP) and 802.1ab LLDP Media Endpoint Devices (LLDP-MED)
● Resilient Ethernet Protocol (REP)
● IEEE 802.1Q tunneling (Q-in-Q) in hardware
● Layer 2 protocol tunneling
Layer 3 Features
● Jumbo frames on all ports (up to 9216 bytes)
● Hardware-based IP Cisco Express Forwarding routing at 250 mpps
● IP routing protocols: EIGRP, OSPF, BGP4, RIP, and RIPv2
● OSPF fast convergence
● OSPF and EIGRP fast convergence protection
● EIGRP stub
● Static routing
● Inter-VLAN routing
● Virtual Route Forwarding lite (VRF-lite)
● Multicast VRF-lite
● VRF-aware IP services
● EIGRP to Multi-VRF CE (VRF-lite)
● Equal Cost Multi Path Routing (ECMP), up to 8 paths
● IPv6: RIP next generation (RIPng) for IPv6
● IPv6: OSPFv3
● IPv6: EIGRP
● Software-based generic routing encapsulation (GRE) tunneling
● IGMP v1, v2, and v3
● IGMP filtering on access and trunk ports
● IP multicast routing protocols: Protocol Independent Multicast (PIM) (sparse mode [SM], dense mode [DM], SDM)
● Protocol Independent Multicast Version 6 (PIMv6) (SM)
● Pragmatic General Multicast
● Bidirectional (Bi-dir) PIM
● Internet Control Message Protocol (ICMP)
● ICMP Router Discovery Protocol
● Dynamic Host Configuration Protocol (DHCP) server
● Per-port multicast suppression
● Unicast Reverse Path Forwarding (RPF)
● Policy-based routing (PBR)
● PIM source-specific multicast (SSM) mapping
High Availability Features
● 1+1 hot-swappable AC or DC power supplies
● Hot-swappable field-replaceable fan tray with redundant fans
● Hot Standby Router Protocol (HSRP)
● HSRPv2
● Virtual Router Redundancy Protocol (VRRP)
● Cisco IOS Embedded Event Manager (EEM)
● Cisco Generic Online Diagnostics (GOLD)
● Enhanced Object Tracking (EOT)
IPv6 Support
● RIP next generation (RIPng) for IPv6
● OSPFv3
● EIGRP
● PIMv6 (SM)
● IPv6 unicast and multicast forwarding in hardware
● IPv6 addressing architecture
● Cisco Discovery Protocol IPv6 address family
● Cisco Express Forwarding and Distributed Cisco Express Forwarding in hardware
● Extended ACL
● ICMP rate limiting
● ICMPv6
● ICMPv6 redirect
● IP MIB
● IPv6 over IEEE 802.1Q
● IPv6 over IPv4 GRE tunnel (tunnel support in software)
● Intrasite Automatic Tunnel Addressing Protocol (ISATAP)
● Loopback
● MLD snooping
● MLDv1 and v2
● Maximum transmission unit (MTU) path discovery for IPv6
● Ping
● IPv6: Secure Shell (SSH) over an IPv6 transport
● Stateless autoconfiguration
● Static routes within IPv6
● Authentication, authorization, and accounting (AAA)
● Telnet
● Trivial FTP (TFTP)
● Traceroute
● Duplicate address detection
● Standard ACL
● IPv6 tunnels in software
● Hop-by-hop option header; in software
● DHCPv6 relay agent
● HSRPv2 IPv6
Sophisticated QoS and Traffic Management
● Modular QoS command-line interface (MQC)
● Per-port per VLAN QoS
● Dynamic Tx queue sizing
● Strict priority queuing
● IP differentiated services code point (DSCP)
● IEEE 802.1p class of service
● Flexible classification marking
● Classification and marking based on full Layer 3 and 4 headers
● Input and output policing based on Layer 3 and 4 headers
● Support for 16,000 policers with flexible assignment for input and output
● 2-rate 3-color policing
● Output queue management shaping and sharing
● Dynamic buffer limiting: Congestion-avoidance feature
Performance and Scalability
● 320-Gbps switching fabric
● Layer 2 hardware forwarding at 250 mpps
● Layer 3 hardware-based IP Cisco Express Forwarding routing at 250 mpps
● Layer 4 TCP and User Datagram Protocol (UDP) hardware-based filtering at 250 mpps
● Software-based learning at a sustained rate of 10,000 hosts per second
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