Storage over Wavelength

Most FC used today is at 1 Gbps; however, 2 Gbps FC is commonly used as well. Two recent options, 4G and 10G, have been introduced into the market. The 10G FC enables customers to better use the available wavelengths between their data centers. These 10G FC on the ONS 15454 transponder card interconnect to FC switches that support 10G trunk interfaces, such as the Cisco MDS 9000 switch.

The ONS 15454 DWDM solution provides the capability for SAN extension using DWDM transponder and muxponder cards. These DWDM line cards support SAN extension:

• 10G MR transponder (1 port) Supports 10G FC.

• 10G data muxponder (8 ports) Supports 1G, 2G, and 4G FC. Also supports IBM GDPS protocol enabling application mirroring, and storage mirroring. Supports buffer-to-buffer credits, enabling a 1-Gbps FC signal to extend about 1200 km.

• 2.5G MR transponder (1 port) Supports 1G and 2G FC. Two versions of this card exist: the splitter protection version and an unprotected trunk version.

• 2.5G data muxponder (8 ports) Supports 1G and 2G FC, as well as ESCON. Two versions of this card exist: a splitter protection version and an unprotected trunk version. Supports buffer-to-buffer credits, enabling a 1-Gbps FC signal to extend about 1600 km.

You can use these cards to translate the incoming traffic, such as FC, FICON, ESCON, or GigE, into a standard International Telecommunications Union (ITU) wavelength. The ports on the 15454 transponder and muxponder cards can support other traffic types in addition to storage interfaces. For example, if the appropriate small form factor pluggable (SFP) is chosen, the 10G data muxponder card can have any of its eight ports as GigE. Because the muxponder cards support multiple traffic types based on SFP type, these cards provide the flexibility for you to multiplex FC, GigE, and IBM InterSystem Channel (ISC) interfaces over a single lambda. This capability enables you to use the 15454 DWDM network efficiently by allowing different traffic types to run over it. This is practical when a service provider offers a private customer ring because multiple services can be sold to the end customer using a single muxponder card in the 15454. Figure 8-5 shows a managed private DWDM ring supporting SAN extension.

Figure 8-5. Example of a Managed DWDM Ring Supporting SAN Extension

Table 8-1 identifies the different SFPs and 10-Gbps small form factor pluggables (XFPs) that you can use to support SAN extension on the ONS 15454.

Table 8-1. ONS 15454 SFPs and XFPs Available for SAN Extension

15454 Card	Client Ports	SFP/XFP Product ID	SAN Interfaces Supported on SFP/XFP*	Fiber	Connector	Tx Power Min/Max (dBm)	Rx Power Min/Max (dBm)
10G Multirate Transponder	1(XFP)	ONS-XC-10G-S1	10G FC	1310 nm single mode	LC	8.2 to +0.5	14.4 to +0.5
		ONS-XC-10G-L2	10G FC	1550 nm single mode	LC	0 to +4	24 to 7
10G Data Muxponder	8 (SFP)	ONS-SE-G2F-SX	1G-FC, 2G-FC	850 nm multimode	LC	9.5 to 0	17 to 0
		ONS-SE-G2F-LX	1G-FC, 2G-FC	1310 nm single mode	LC	9.5 to 3	19 to 3
		ONS-SE-4G-MM	4G FC	850 nm multimode	LC	9 to 2.5	15
		ONS-SE-4G-SM	4G FC	1310 nm single mode	LC	Average power of 7.3 dBm at an ER of 9 dB	Average power of 17.3 dBm at an ER of 9 dB
2.5G MR Transponder	1(SFP)	ONS-SE-200-MM	ESCON	1310 nm multimode	LC	20.5 to 15	29 to 14
		ONS-SE-G2F-SX	1G-FC, 2G-FC	850 nm multimode	LC	9.5 to 0	17 to 0
		ONS-SE-G2F-LX	1G-FC, 2G-FC	1310 nm single mode	LC	9.5 to 3	19 to 3
2.5G Data Muxponder (SFP)	8 (SFP)	ONS-SE-G2F-SX	1G-FC, 2G-FC	850 nm multimode	LC	9.5 to 0	17 to 0
		ONS-SE-G2F-LX	1G-FC, 2G-FC	1310 nm single mode	LC	9.5 to 3	19 to 3
		ONS-SE-200-MM	ESCON	1310 nm multimode	LC	20.5 to 15	29 to 14

Note

Other interfaces, such as SONET and Ethernet, are supported by the same SFP and XFP listed in Table 8-1. Refer to the Cisco ONS 15454 documentation for a list of non-SAN interfaces supported by the SFPs and XFPs just shown. XFPs are 10G optical transceiver modules that combine transmitter and receiver functions in one module. XFP modules are protocol independent and can be used to support OC-192/STM-64, 10-Gigabit Ethernet, 10-Gigabit Fibre Channel, and G.709 data streams in routers and switches.