High-Performance Small Form-Factor Cisco Catalyst Switch with Flexibility and Investment Protection for Top-of-Rack Switching or Midmarket Collapsed Core and Aggregation Layer Deployment
Product Overview
The Cisco® Catalyst® 4900M Switch (Figure 1) is designed for data center network top-of-rack switching and midmarket collapsed core and aggregation layer deployment. Optimized for ultimate deployment flexibility for the data center, the Cisco Catalyst 4900M can be deployed for 10/100/1000 or 1/10GBASE-T server access with 1:1 uplink-to-downlink oversubscription and environments with a mix of 10/100/1000 and 10 Gigabit Ethernet servers or all 10 Gigabit Ethernet servers.
The Cisco Catalyst 4900M is a 320-Gbps, 250-million-packets-per-second (mpps), two-rack-unit (2RU) fixed-configuration switch with eight fixed wire-speed X2 ports on the base unit and two optional half-card slots for deployment flexibility and investment protection. Low latency, scalable buffer memory, and high availability with 1+1 hot-swappable AC or DC power supplies and a field-replaceable fan tray optimize the Cisco Catalyst 4900M for data centers of any size.
For the midmarket collapsed core and aggregation layer and in the branch office, the Cisco Catalyst 4900M provides an ideal solution for space-constrained deployments that require high-performance wire-speed services and high availability. With the unique semifixed architecture and support of the Cisco TwinGig Converter Module, the Cisco Catalyst 4900M can be used in a collapsed core and aggregation layer LAN deployment, providing the flexibility to deploy Gigabit Ethernet now and cost-effectively migrate to 10 Gigabit Ethernet as requirements change.
The Cisco Catalyst 4900M configuration provides wire-speed connection, buffers to handle bursty traffic, and a comprehensive set of Layer 3 features required at the collapsed core and aggregation layer of the network. The Cisco Catalyst 4900M also supports a suite of ease-of-management features to simplify operations.
In addition to deployment flexibility, the half slots provide investment protection for further additions of Gigabit Ethernet and 10 Gigabit Ethernet media.
Table 1 summarizes the features and benefits of the Cisco Catalyst 4900M.
Table 1. Features and Benefits
| Feature | Benefit |
| Outstanding Scalability | |
| 17.5 MB shared buffers | Large buffers for microburst and high traffic control |
| Up to 320 Gbps and 250 mpps wire-speed performance with low latency | Delay-sensitive traffic forwarded without interruption |
| Wire-speed uplinks | Elimination of oversubscription bottlenecks between downlinks and uplinks across the switch with any combination of half cards |
| Configuration Flexibility | |
| Choice of Gigabit Ethernet and 10 Gigabit Ethernet interfaces | Granular configuration options for all—Gigabit Ethernet to 10 Gigabit Ethernet transition |
| Choice of copper or fiber 1G/10G Ethernet interfaces | Mix and match 1G/10G RJ-45 and X2 line cards |
| Online insertion and removal of cards | In-service line card changes |
| Cisco TwinGig Converter Module support* | Gigabit Ethernet and 10 Gigabit Ethernet interface support on the same card |
| Dual AC or DC power | High availability for nonstop operation |
| Investment Protection | |
| Modular half slots | Migration to new media types through additional half cards |
| Field-replaceable power supplies and hot-swappable removable fan | Extended longevity of hardware |
| Use of existing software | Consistent operational model for all Cisco Catalyst 4900 Series Switches |
One System, Many Configurations
The Cisco Catalyst 4900M can be configured to meet the needs of many types of top-of-rack deployments. Table 2 summarizes the configuration options.
Table 2. Cisco Catalyst 4900M Configuration Options
| Configuration | 10 Gigabit Ethernet (X2) Ports | 1/10 Gigabit Ethernet (10GBASE-T) Ports | 10/100/1000 Ports | 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 | 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 |
The Cisco Catalyst 4900M includes a console port to manage all system features. Remote in-band management is available with Simple Network Management Protocol (SNMP), Telnet client, BOOTP, and Trivial File Transfer Protocol (TFTP). Support for local or remote out-of-band management is delivered through a terminal or modem attached to the console interface.
The Cisco Catalyst 4900M supports file allocation table (FAT) file systems. System images can be updated directly through Microsoft Windows–based machines with compact flash memory readers.
Using CiscoWorks solutions, Cisco Catalyst switches can be configured and managed to deliver end-to-end device, VLAN, traffic, and policy management. The CiscoWorks LAN Management Solution (LMS) bundle offers tools such as CiscoWorks Resource Manager Essentials and CiscoWorks CiscoView. These web-based management tools offer several services, including automated inventory collection, software deployment, easy tracking of network changes, views into device availability, and quick isolation of error conditions.
Software Configuration Options
Table 3 describes the software configuration options for the Cisco Catalyst 4900M Switch, and Table 4 describes the hardware options.
Table 3. Software Configuration Options for the Cisco Catalyst 4900M Switch
| Software Image | Description |
| IP Base image | Standard Layer 3 image, including Routing Information Protocol Version 1 (RIPv1), RIPv2, static routes, and Enhanced Interior Gateway Routing Protocol (EIGRP) stub |
| Enterprise Services image | Enhanced Layer 3 image, including Open Shortest Path First (OSPF), EIGRP, and Border Gateway Protocol (BGP); also includes all IP Base image features |
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