Hi,you can use the 12000 with regular IOS and also with XR IOS so I think this is the difference between 12000 and 12000 XR.And you can use XR IOS on both platforms 12k and CRS-1 but if you want to use it on a 12k there are images which contain XR120...

Hi,I don't think you should install two ten gig interfaces on an SIP-601 because it has only a 10GB Engine. Please have a look for further information here:http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/install_upgrade/XR1200...

Hi,I was talking about sdh networks because I wasn't aware of the fact you were using SONET. So replace all sdh in my last post by SONET in order to fit my answer to your question.brSebastian

Hi,although I'm a little late and you solved the problem on your own this information could be helpful.The S1 byte indicates the clock quality in sdh/sonet networks. You received 0xf (1111) which is known as "don't use for synchronization" in sdh wor...