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显示标签为“Cisco module in Portugal”的博文。显示所有博文

2014年3月5日星期三

What's the function of the Cisco module

What's the function of the Cisco light module ?
Cisco module classification and description:
1 Cisco 1 × 9 package optical modules: welding type module, general speed is less than1000m, using SC interface.
2 SFF package, Cisco optical module: welding small package module, general speed is less than 1000m, using LC interface.
3 GBIC package, Cisco optical module: hot pluggable Gigabit interface module, using SC interface.
4 SFP package, Cisco optical module: hot plug small package module, the highest rate of up to 4G, use the LC interface.
5 XENPAK package, Cisco optical module: applications in Gigabit Ethernet, using the SC interface.

The optical module is connected to the module of a photoelectric conversion effect, which transmit the electric signal into optical signal, the optical fiber transmission, the receiving end ofthe optical signals are converted into electric signals. The optoelectronic devices, circuits andoptical interface and other components, optoelectronic devices including the transmitting and receiving two parts.
Cisco 4500 6500 and 7600 are modular design, apart from the main chassis, supervisor engine,linecard, power supplies and modules will be also required for these products. 3Anetwork.comwholesales Cisco 450065007600 Modules, ship to worldwide.
WS-X6748-GE-TXWS-X6724-SFP the popular cisco module up to 50% off on 3anetwork.com.


2014年2月25日星期二

WS-X4712-SFP+E module can't put into an R-E chassis ?

Does anyone know why is not possible to put a WS-X4712-SFP+E - module into an R-E chassis?
The module has the same connection to backplane as the WS-X4748-UPOE+E
and this one works in a R-E chassis.

I know the restriction of Cisco that the 4712 is only supported in 4503-E, 4506-E,
4507+E and 4510+E, WS-X4448-GB-SFP, but why?
Are there hardware-restrictions, is the backplane different?

The solution:
The reason is the chassis itself.

The 4712 has a 48 gigabits per-slot capacity. You need the Sup 7E on the R+E chassis to achieve the 48Gbps per slot in order to get a 2.5:1 over-suscription rate.


On the R-E chassis, the 7E defaults to 24Gbps per slot, and the over-subscription ratio increases to 5:1 which was considered unacceptable. Hence we have disabled the working of the 4712 on R-E chassis. It is a chassis limitation.