Fabric OS Documentation Updates Supporting Fabric OS v6.4.x

Fabric OS Documentation Updates 53
53-1002063-12
Chapter
8
Fibre Channel over IP Administrator’s Guide
In this chapter
The updates in this chapter are for the Fibre Channel over IP Administrator’s Guide, published
March 2010.
•Documentation updates for Fabric OS v6.4.0 and v6.4.1 . . . . . . . . . . . . . . 53
Documentation updates for Fabric OS v6.4.0 and v6.4.1
Chapter 3, FCIP on the 7500 Switch and FR4-18i Blade
The following section is added under “Creating IP interfaces and routes.”
IP interface considerations
There may be an issue a tunnel not initiating after creating new IP interfaces (IPIFs) for a 7500 or
FR4-18i GbE interface when multiple IPIFs exist for the tunnel on the same GbE interface. This
occurs when the received destination IP address falsely appears to be a broadcast address when
compared to the first IPIF subnet mask. To avoid this problem, always define IPIFs in order, with the
most available host addresses defined first.
As an example, if IP subnet 1 has a mask of 255.255.255.0 and subnet 2 has a mask of
255.255.0.0, then the first IPIF defined on a GbE port should be the subnet 2 IPIF (as it is the least
restrictive address). This will avoid a false positive check for a broadcast address for any IP address
in subnet 1.
Appendix A, Fibre Channel Fast Write (FCFW)
This appendix is added to the Fibre Channel over IP Administrator’s Guide.
In this appendix
•FC Fast Write (FCFW) concepts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
•Configuring and enabling FCFW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
•Disabling FCFW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
•Disabling FCFW flows without removing FCFW . . . . . . . . . . . . . . . . . . . . . . . 58
NOTE
Fibre Channel Fast Write is currently only supported by the 7500 switch and FR4-18i blade.