[f-nsp] 10G-XFP-LR optics used on short links

[Kevin Hodle]

Hi,

   Niels is correct. We routinely use short patches between Foundy's LR
XFPs (and other vendors LR/LH optics) with no ill effects. Attenuators
are generally unnecessary for 1310nm optics.

Here is an example of a Foundry LR XFP with a <2 meter patch to a LR Xenapk:

Port 1/3:
    Type  : 10GBASE-LR/LW (XFP)
    Vendor:     FOUNDRY-NETWORKS, Version:                   01

 Port  Temperature   Tx Power     Rx Power     Tx Bias Current
+----+-----------+----------+------------+-------------------+

1/3   33.0625 C  -001.9010 dBm -001.5689 dBm   41.478 mA
       Normal       Normal        Normal      Normal


Cheers!
  Kevin