I understand the whole LX/LH concept. I was more wondering what specifically the LX/LH GBICs report as their media type (LH?), and if there's an older part (or non-Cisco) part that reports LX.
Our connection to a cat65k reporting LH is working, whereas a connection reporting LX is not. We've checked levels on this particular link, and everything looks within spec for both pieces of equipment - so I'm slightly grasping at straws. It's a remote site involving multiple vendors, so troubleshooting is painful to say the least. -- matt Richard A Steenbergen wrote: > On Fri, Mar 21, 2008 at 03:57:59PM -0500, Max Pierson wrote: >> 1000BaseLX/LH interfaces are fully comply with the IEEE 802.3z >> 1000BaseLX standard. However, their higher optical quality allows them >> to reach 10 km over single-mode fiber (SMF) versus the 5 km specified in >> the standard. This is where the LH kicks in...which allows them to >> achieve a longer distance when used with SMF. > > But at this point every LX you're ever going to run across does 10km or > better (often much better), and the use of the name "LH" is just a > Ciscoism that only serves to confuse people. Also note that different > vendors use the names differently, for example Juniper LH is a 70km 1550nm > optic (what cisco calls ZX), which is different from its LX 10km 1310nm > optic. > > At any rate they're all compatible with each other, all RX units are > wide-band, so as long as you aren't trying to engineer something > complicated (with a filter, with concerns about dispersion, etc) your only > real concern is "do I have enough optical budget" and maybe "do I need to > attenuate". > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
