Tag Archives: 1000Base-T SFP Transceiver

The Cisco Wireless LAN Controller Configuration

A distribution system port connects the controller to a neighbor switch and serves as the data path between these two devices. This chapter discusses a few common methods on the models that have these options.

Cisco 4402 controllers have two Gigabit Ethernet distribution system ports, each of which is capable of managing up to 48 access points (AP). The Cisco 4404 controllers have four Gigabit Ethernet distribution system ports, each of which is capable of managing up to 48 APs per port. The 4404-25, 4404-50, and 4404-100 models allow a total of 25, 50, or 100 APs to join the controller.The Gigabit Ethernet ports on the 4402 and 4404 controllers accept these SX/LC/T small form-factor plug-in (SFP) modules:

• 1000BASE-SX SFP module which provide a 1000-Mbps wired connection to a network through an 850 nm (SX) fibre-optic link using an LC physical connector.

1000BASE-LX SFP module which provide a 1000-Mbps wired connection to a network through a 1300nm (LX/LH) fibre-optic link using an LC physical connector.

• 1000BASE-T SFP module which provide a 1000-Mbps wired connection to a network through a copper link using an RJ-45 physical connector.

The Cisco 5508 controllers have eight Gigabit Ethernet distribution system ports through which the controller can manage multiple APs. The 5508-12, 5508-25, 5508-50, 5508-100 and 5508-250 models allow for 12, 25, 50, 100 or 250 APs to join the controller. Cisco 5508 controllers have no restrictions on the number of APs per port. However, Cisco recommends using link aggregation (LAG) or configuring dynamic AP-Manager interfaces on each Gigabit Ethernet port to automatically balance the load. If more than 100 APs are connected to the 5500 series controller make sure that more than one Gigabit Ethernet interface is connected to the upstream switch. The Gigabit Ethernet ports on the 5508 controllers accept these SX/LC/T small form-factor plug-in (SFP) modules:

• 1000BASE-SX SFP module, which provide a 1000-Mbps wired connection to a network through an 850nM (SX) fibre-optic link using an LC physical connector

• 1000BASE-LX SFP module, which provide a 1000-Mbps wired connection to a network through a 1300nM(LX/LH) fibre-optic link using an LC physical connector

1000BASE-T SFP module, which provide a 1000-Mbps wired connection to a network through a copper link using an RJ-45 physical connector

The Cisco Catalyst 6500 Series Switch Wireless Integrated Services Module (WiSM) and the Cisco 7600 Series Router WiSM have eight internal Gigabit Ethernet distribution system ports (ports 1 through 8) that connect the switch or router and the integrated controller.These internal ports are located on the backplane of the switch or router and are not visible on the front panel Through these ports the controller can support up to 300 APs.

The controller network module within the Cisco 28/37/38xx Series WiSM can support up to 6812 or 25 APs (and up to 256, 256, 350or 350 clients respectively), depending on the version of the network module. The network module supports these APs through a Fast Ethernet distribution system port (on the NM-AIR-WLC6-K9 6-access-point version) or a Gigabit Ethernet distribution system port (on the 8-, 12-, and 25-access-point versions and on the NME-AIR-WLC6-K9 6-access-point version) that connects the router and the integrated controller. This port is located on the router backplane and is not visible on the front panel.The Fast Ethernet port operates at speeds up to 100 Mbps, and the Gigabit Ethernet port operates at speeds up to 1 Gbps.

The Catalyst 3750G integrated Wireless LAN Controller(WLC) switch has two internal Gigabit Ethernet distribution system ports (ports 27 and 28) that connect the switch and the integrated controller.These internal ports are located on the switch backplane and are not visible on the front panel Each port is capable of managing up to 48 APs However, Cisco recommends no more than 25 APs per port due to bandwidth constraints. The -S25 and -$50 models allow a total of 25 or 50 APs to join the controller.

Each distribution system port is, by default, an 802.1 Q VLAN trunk port. The VLAN trunking characteristics of the port are not configurable. Some controllers support LAG, which bundles all the distribution system ports of the controller into a single 802.3ad port channel. Cisco 4400 series controllers support LAG in software Releases 3.2 and later; Cisco 5500 series controllers Support LAG in software Releases 6.0 and later; and LAG is enabled automatically on the controllers within the Cisco WiSM and the Catalyst 3750G integrated WLC switch.

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Cisco Gigabit Ethernet Gbic SFP Modules From Fiberstore

The industry-standard Cisco Small Form-Factor Pluggable (SFP) Gigabit Interface Converter is a hot-swappable input/output device that plugs into a Gigabit Ethernet port or slot, linking the port using the network (Figures 1, 2). SFPs could be used and interchanged on a wide variety of Cisco products and could be intermixed in combinations of 1000BASE-SX,1000BASE-T , 1000BASE-EX, 1000BASE-LX/LH, 1000BASE-ZX, or 1000BASE-BX10-D/U on a port-by-port basis.

Figure 1. Cisco optical Gigabit Ethernet SFP

Cisco optical Gigabit Ethernet SFP

Figure 2. Cisco 1000BASE-T optical SFP

1000BASE-T SFP for Copper Networks

1000BASE-SX SFP for Multimode Fibre Only

The 1000BASE-SX SFP, compatible with the IEEE 802.3z 1000BASE-SX standard, operates on legacy 50 μm multimode fibre links up to 550 m and on 62.5 μm Fibre Distributed Data Interface (FDDI)-grade multimode fibres up to 220 m. It can support up to 1km over laser-optimized 50 μm multimode fibre cable.

1000BASE-T SFP for Copper Networks

The 1000BASE-T SFP is run on standard Category 5 unshielded twisted pair copper cabling of up to 100m (328ft) link length. Cisco 1000BASE-T SFP module support 10/100/1000 autonegotiation and Auto MDI/MDIX.

1000BASE-EX SFP for Long-Reach Single-Mode Fibres

The 1000BASE-EX SFP works on standard single-mode fibre-optic link spans of up to 40 km in length. A 5-dB inline optical attenuator should be inserted between the fibre-optic cable and the receiving port on the SFP at each end of the link for back-to-back connectivity.

1000BASE-LX/LH SFP for Both Multimode and Single-Mode Fibres

The 1000BASE-LX/LH SFP, compatible with the IEEE 802.3z 1000BASE-LX standard, operates on standard single-mode fibre-optic link spans of up to 10 km and up to 550 m on any multimode fibres. When used over legacy multimode fibre type, the transmitter should be coupled through a mode conditioning patch cable.

1000BASE-ZX SFP for Long-Reach Single-Mode Fibres

The 1000BASE-ZX SFP works on standard single-mode fibre-optic link spans of up to approximately 70 km in length. The SFP provides an optical link budget of 21 dB, but the precise link span length depends on multiple factors such as fibre quality, quantity of splices, and connectors.

When shorter distances of single-mode fibre (SMF) are used, it could be important to insert an inline optical attenuator in the connect to avoid overloading the receiver. A 10-dB inline optical attenuator must be inserted between fibre-optic cable plant and the receiving port on the SFP at per end of the link whenever the fibre-optic cable span loss is lower than 8 dB.

1000BASE-BX10-D and 1000BASE-BX10-U SFP for Single-Fibre Bidirectional Applications

The 1000BASE-BX-D and 1000BASE-BX-U SFPs, compatible with the IEEE 802.3ah 1000BASE-BX10-D and 1000BASE-BX10-U standards, operate on a single strand of standard SMF.

A 1000BASE-BX10-D equipment is always linked to a 1000BASE-BX10-U device with a single strand of normal SMF using an operating transmission range up to 10 km.

The communication over a single strand of fibre is achieved by separating the transmission wavelength of the two devices as depicted in Figure 3: 1000BASE-BX10-D transmits a 1490-nm channel and receives a 1310-nm signal, whereas 1000BASE-BX10-U transmits at a 1310-nm wavelength and receives a 1490-nm signal. Note in Figure 3 the presence of a wavelength-division multiplexing (WDM) splitter incorporated into the SFP to separate the 1310-nm and 1490-nm light paths.

Cisco offers many types and models of SFP optical transceivers which are designed for a number of fibre optic networking applications. Using a complete information about these module types and selecting the right SFP module for installation can be hard in case you don’t know the SFP products well . Fiberstore is a online store which sales Cisco SFP Optical Transceiver and Cisco SFP Cables. Together with Fiberstore, which is a Global Delivery from their like no any others. Fiberstore will not only delivery the correct shipment, but also for more things for an efficient and flexible way of business cooperation with their partners.