FE to GE

[m.abdulmonem]

one of our clients want FE (100 M) but because he has only electrical port and we have optical port, he suggest to connect it to GE in his equipment.

my question : is this connection working propably (FE to GE)???

[Leo Laohoo]

No it won't.  You'll need to get a fibre optic module that only negotiates to 100BaseFx.

Cisco 100BASE-FX SFP Fast Ethernet Interface Converter on Gigabit SFP Ports

http://www.cisco.com/en/US/prod/collateral/modules/ps5455/ps6578/product_data_sheet0900aecd801ba88e_ps5000_Products_Data_Sheet.html

[m.abdulmonem]

Thanks Leolaohoo.

so it won't work even if we make GE aut- negotiation?

[Marvin Rhoads]

Most Cisco fiber interfaces require one to set "speed nonegotiate" for proper operation. Also, note that the SFP Leo linked to only works on certain specific switch types.

If you want to rate limit a service to 100 Mbps and your optical port is 1 Gbps, you may be able to use Quality of Service (QoS) or other policy settings to throttle the bandwidth available, depending on your platform and image.

[Leo Laohoo]

If you are presented with a fibre cable from the provider, find out what the speed is set.  Most of the time, fibre optic modules will not negotiate to any other speed.  So if the provider's fibre is 1Gbps, then you need to purchase 1Gbps module of the same "flavour" (SX, LR, LX, etc). 

[m.abdulmonem]

Eperts,

What about the below situation:

We are going to create VC4 using ML-MR card in  a repeater (Site B), The client will take it as FE-Optical. On the other side, circuit will be cross-connect over Structure STM-16 in Terminal (Site A) ( Please see the below drawing). the circuit protected as SNCP.from SiteA to Site B.

How is the availability of this scenario?

[Tom Randstrom]

Given your diagram, it would be difficult to determine if this configuration will work unless someone has deployed this configuration.  It will depend upon the capabilities of Huawei's terminating Ethernet card and the interoperability with the Cisco ML-series card.  If you had bookended ML-series cards, one 100MB card and one 1000MB card, it would be possible to accomplish what you are trying to do.  The only way to determine if this will work is to set-up a prototype network in a lab. 

Hopefully we get someone online that may have done some interop testing.

[viyuan700]

Hi ,

If your connection is the way you have explained in the diagram then it is going to work.

One end you are mapping fastetheremt to VC4 another end you are mapping GE to VC4. Here you are not connecting FE to GE. but with an STM circuit. they are connected to different equipment through STM circuit which is standard.

I don't think you need any testing before. If you have the same provider you can ask them but 99.9999999999999% you will not have problem.

Ifyou own these euipments then just configure a circuit and test.