z/VSE 6.2: More flexibility with LFP
Ingolf24 120000DRN3 Visits (7821)
In the z/VSE 6.2 GA announcement on October 10 (see my blog entry), we described a networkung enhancement for the Linux Fast Path (LFP) function.
Short summary, what LFP is:
Besides the two TCP/IP stacks we also provide the LFP function that bypasses the TCP/IP stack on z/VSE - or doesn't require one for selected TCP/IP applications. A TCP/IP application on z/VSE can communicate with a LFP daemon (small program) running on Linux on z Systems. The daemon communicates through the Linux TCP/IP stack with the network.
The z/VSE 6.2 enhancement is described as follows:
The z/VSE Linux Fast Path (LFP) allows selected TCP/IP applications to access the network without requiring a TCP/IP stack on z/VSE. LFP is already available in a z/VM guest, or LPAR environment. To offer clients more connectivity options, LFP running as a z/VM guest can now also communicate with a TCP/IP stack in an LPAR or with the z/VSE Network Appliance.
That is you can now use LFP in any combination - LPAR to LPAR, z/VM guest to z/VM guest, or z/VM guest to LPAR.
If you are interested in VIA or want to use VIA, this function is described in the z/VSE TCP/IP Support book. You can find that book here. For the z/VSE Network Appliance (VNA) please use the documention available for download here. VNA will be included into the z/VSE 6.2 TCP/IP Support book.
There is also an old but good article, that describes LFP - here.