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The Catalyst 5000 series switches allow traditional shared-hub LANs to migrate toward large-scale, fully integrated internetworks. Catalyst 5000 series switches provide switched connections to individual workstations, servers, LAN segments, backbones, or other Catalyst 5000 series switches using shielded twisted-pair, unshielded twisted-pair, and fiber-optic cable.
For descriptions of the Catalyst 5000 series switch hardware, refer to the Catalyst 5000 Series Installation Guide and the Catalyst 5000 Series Module Installation Guide.
Table 1-1 describes the Catalyst 5000 series switches.
| Switch Model | Description | Features |
|---|---|---|
| Catalyst 5002 | 2-slot switch | |
| 5-slot switch |
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| 5-slot switch |
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| 13-slot switch |
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The Catalyst 5002 and Catalyst 5000 switches have a single, integrated 1.2-Gbps switching backplane; the Catalyst 5505 and 5500 switches have a 3.6-Gbps switching backplane. All Catalyst 5000 series switches support switched 10/100-Mbps Ethernet/Fast Ethernet and Ethernet repeater connections, with backbone connections to Fast Ethernet, Asynchronous Transfer Mode (ATM), Fiber Distributed Data Interface (FDDI), and Copper Distributed Data Interface (CDDI).
Slot 1 in all Catalyst 5000 series switches is dedicated to the supervisor engine module. The Catalyst 5505 and 5500 switches support a redundant supervisor engine module in slot 2. The Catalyst 5500 switch supports LightStream 1010 ATM modules in slots 9 through 12.
Refer to the "Supervisor Engine Modules" section in this chapter and "Supervisor Redundant Operation," for more information on the Catalyst 5000 series supervisor engines.
All Catalyst 5000 series switches support wire-speed, single-stream, 10-Mbps Ethernet and 100-Mbps Fast Ethernet packet transmission for packet sizes from 64 to 1500 bytes. When 100 interface pairs are configured, the switches also support wire-speed, multiple-stream 10-Mbps Ethernet traffic with no packet loss.
Three priority levels are available on the data-switching bus to handle an oversubscribed interface: backplane-based, high priority, and low priority.
Three types of supervisor engine modules are available on Catalyst 5000 series switches: Supervisor Engine I, Supervisor Engine II, and Supervisor Engine III. Supervisor Engines II and III support the redundant supervisor engine option available in the Catalyst 5505 and 5500 switches.
Table 1-2 shows the supervisor engine module types and which Catalyst 5000 series switch each supports.
| Switch | Supervisor Engine I | Supervisor Engine II | Supervisor Engine III |
|---|---|---|---|
| Catalyst 2900 | Yes | No | No |
| Catalyst 2926 | No | Yes | No |
| Catalyst 5002 | Yes | Yes | Yes |
| Catalyst 5000 | Yes | Yes | Yes |
| Catalyst 5505 | No | Yes | Yes |
| Catalyst 5500 | No | Yes | Yes |
Catalyst 5000 series supervisor engine software is factory installed on every supervisor engine module. Ethernet and Fast Ethernet modules also use this software. However, FDDI and ATM LAN Emulation (LANE) modules require additional software images, which are installed directly onto the modules.
The Catalyst 5000 series supervisor engine software has a command-line interface (CLI) that allows you to configure Catalyst 5000 series modules. For more information, see "Command-Line Interfaces." For descriptions of the available CLI commands, refer to the Catalyst 5000 Series Command Reference publication.
Catalyst 5000 series supervisor engine software uses the IEEE 802.1D bridge protocol, Spanning-Tree Protocol, which helps create fault-tolerant internetworks by ensuring an active, loop-free data path between all nodes in the network. The Spanning-Tree Protocol uses an algorithm to calculate the best loop-free path throughout a Catalyst 5000 series switched network. Spanning-tree packets are sent and received by switches in the network at regular intervals. The packets are not forwarded by the switches participating in the spanning tree, but instead are processed to determine the current topology of the spanning tree itself.
Catalyst 5000 series switching modules use OSI Layer 2 LAN switching to prevent unicast packets that are sent between two switched ports from going to all the switched ports on the LAN, thereby increasing the bandwidth of all networks. Catalyst 5000 series switches support the following switching modules:
In addition, the Catalyst 5000, Catalyst 5505, and Catalyst 5500 switches support the RSM.
Catalyst 5000 series Ethernet and Fast Ethernet switching modules provide high-density switching for both wiring closet and data-center applications.
The Catalyst 5000 series Ethernet modules connect workstations and repeaters at port connection speeds of 10 Mbps, and the Fast Ethernet modules connect workstations, servers, switches, and routers at port connection speeds up to 100 Mbps. The 10/100BaseTX Fast Ethernet Switching Module supports autosensing and autonegotiation, which allow Catalyst 5000 series switches to negotiate the correct port connection speed (10 or 100 Mbps) and duplex mode (half or full duplex) with an attached device. Fast Ethernet connections can interconnect multiple Catalyst 5000 series switches on multiple floors in different buildings of a campus. Fast Ethernet connections can also act as redundant backup links between switches and can expand existing Ethernet networks that need additional capacity.
In addition, Fast EtherChannel modules provide up to 800 Mbps (full duplex) parallel bandwidth between a Catalyst 5000 series switch and another switch or host by grouping multiple Fast Ethernet interfaces into a single logical transmission path. Software release 3.1 supports the Port Aggregation Protocol (PAgP), which provides automated configuration of Fast EtherChannels.
The Catalyst 5000 series switch employs virtual LANs (VLANs) and Spanning-Tree Protocol on all Ethernet and Fast Ethernet ports.
For information on configuring the Ethernet and Fast Ethernet modules, including Spanning-Tree Protocol, refer to "Configuring Ethernet and Fast Ethernet Switching Modules." For information on configuring VLANs, refer to "Configuring VLANs."
Catalyst 5000 series switches support an optional CDDI/FDDI switching module. A/B port cards--which support single-mode optic fiber, multimode optic fiber, and CDDI/MLT-3 copper cabling--provide connectivity from the CDDI/FDDI interface to a variety of wiring plants. All A/B port cards allow you to configure the switch for single-attached, dual-attached, or dual-homed operation.
When configured as a single-attached station (SAS), either the Port A or Port B on the FDDI module is connected to an M port on a CDDI/FDDI concentrator. The concentrator is connected to the CDDI/FDDI rings through its own A/B ports. When configured as a dual-attached station (DAS), both Ports A and B of the CDDI/FDDI module must attach to the CDDI/FDDI ring cabling.
For information on configuring the CDDI/FDDI modules, refer to "Configuring the CDDI/FDDI Module."
Catalyst 5000 series ATM switching modules support ATM connectivity by using LANE technology. LANE allows an ATM network to model a LAN backbone for Ethernet switches. LANE, which is an ATM service defined by the ATM Forum specification "LAN Emulation over ATM," ATM_FORUM 94-0035, makes an ATM interface look like one or more Ethernet interfaces. It also allows upper-layer protocols that expect connectionless service to use connection-oriented ATM switches. LANE extends VLANs throughout the network by establishing point-to-point ATM virtual-circuit connections between switches on the same VLAN.
The following are LAN-specific characteristics:
The Catalyst 5000 series also includes an ATM Dual PHY DS3 switching module that runs permanent virtual circuit (PVC) traffic-shaping software at speeds up to 45 Mbps.
For information on configuring the ATM module, refer to "Configuring the ATM Module." For information configuring PVC-Supported VLANs on ATM modules, see "Configuring PVCs for the ATM Module."
The Catalyst 5000 series RSM is a Route/Switch Protocol-2 (RSP2)-based router module running Cisco IOS router software that plugs directly into the Catalyst 5000 series switch backplane.
From the perspective of the Catalyst 5000 series switch, the RSM appears as a module with a single trunked port and one MAC address. From the perspective of the user, the RSM has one port. This port is unlike other Catalyst 5000 switch line card ports in that it has no external attributes such as media type or speed. Within this trunk port, the RSM can route between VLANs and between optional port adapters in a Versatile Interface Processor (VIP) which can be installed in the neighboring slot. The RSM can also have an optional VIP2 module that allows the RSM to emulate a Cisco 7500 series router.
For information on configuring the RSM, refer to "Configuring the Route Switch Module."
Catalyst 5000 series switches support these software features:
A VLAN on a Catalyst 5000 series switch is an administratively defined broadcast domain. Only end stations within the VLAN receive packets that are unicast, broadcast, or multicast (flooded). A VLAN enhances performance by limiting traffic; it allows the transmission of traffic among stations that belong to it and blocks traffic from other stations in other VLANs. VLANs can provide security barriers (firewalls) between end stations on different VLANs within the same switch. The VLAN feature includes the following components:
For information on configuring VLANs, refer to "Configuring VLANs."
Multicasting saves bandwidth by forcing the network to replicate packets only when necessary and by allowing hosts to join and leave groups dynamically. The multicast services feature includes the following components:
For information on configuring multicast services, refer to "Configuring Multicast Services."
The Catalyst 5505 and 5500 switches offer the option of using two Supervisor Engine II or Supervisor Engine III modules to provide fault tolerance in mission-critical environments and to ensure switching resilience. The two supervisor modules are installed in slots 1 and 2 of the chassis. When the switch is powered up, the supervisor module that comes up first enters active mode, while the second supervisor module goes to standby mode. All network management functions occur on the active supervisor. The Ethernet ports on the standby supervisor are inactive, in the same way that enabled ports on disabled modules are inactive. The console port on the standby supervisor module is also inactive.
If the active supervisor module detects a major problem, it resets itself. The standby supervisor detects that the active supervisor has been reset and becomes the active supervisor. When the resetting supervisor comes back up, it enters standby mode.
An LED on the supervisor module indicates its status. The LED is green when the supervisor module is in active mode, orange when it is in standby mode, and red if there is a redundancy error condition. If you have two supervisor engines installed, the LED on the standby supervisor is orange.
For information on configuring supervisor resilience, refer to "Supervisor Redundant Operation."
Network security allows you to control access to network resources to protect sensitive information from unauthorized users. The network security feature includes the following components:
For information on configuring network security, refer to "Configuring Network Security."
Catalyst 5000 series switches offer network management and control through the CLI or through alternative methods, such as CiscoWorks for Switched Internetworks (CWSI) and SNMP. The network management feature includes the following components:
For information on network management and control features, refer to "Configuring Network Management."
Catalyst 5000 series switches support the following SNMP types:
Catalyst 5000 series switches allow RMON alarms to be set for all Management Information Base (MIB) objects supported by the Catalyst 5000 series SNMP agent. In previous software releases, the ability of the Catalyst 5000 to detect and report problems was limited to RMON objects in RFC 1757.
Catalyst 5000 series switches use the following standard Internet protocols:
Catalyst 5000 series switches support the following standard and enterprise-specific MIBs:
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