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New Member

ATM single mode fiber IR to LR connection

Hello all,

I submitted this question to CCO-open forum:

Can I connect Two Routers, First 7513 with ATM Single mode Long REACH module ( PA-A3-OC3SML ) and the Second 3661 with ATM Single mode Intermediate Reach module

I have a direct fiber cable between the two routers and distance between them is 2 Km

Thanks for your help

and I got this reply from them:

Answer submitted by a Cisco CCIE engineer -

You can do it but be careful with the power-budgets. You may have to put an attenuator on the LR transmitter.

Now my question is:

both my router ATM intface is up and line protocol is up too

but I have no iput in both sides...

and I could not even ping the other side...

Please can anyone help me in this

Regards,,

Magdy

  • Other Network Infrastructure Subjects
3 REPLIES
New Member

Re: ATM single mode fiber IR to LR connection

Magdy,

If your interfaces are both up and up, and you are sending from both sides but not receiving, then contact your service provider for a test assist with a NOC engineer. Send pings from both boxes, considering you have access to both at the same time, and have the engineer verify that he/she can see traffic at both ends. If your interfaces are up, physical hardware allowing, and ip addressing correct, it sounds like the next step should be focused towards circuit mapping. Good luck.

New Member

Re: ATM single mode fiber IR to LR connection

it is a direct fiber cable between the two routers with 2 Km distance

Both interfaces are up, line protocol are up

but CRC error , and no input packets, and I can'r ping both ends

thanks

Magdy

New Member

Re: ATM single mode fiber IR to LR connection

http://www.cisco.com/warp/public/121/crc_tshooting.html

This link will provide you with info on determining why you are seeing CRC errors on your ATM interfaces. Hope it helps.

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