topic Re: IP network and Fibre Channel in Operating System - HP-UX

IP network and Fibre Channel

LucianoCarvalho — Thu, 20 Nov 2003 12:48:50 GMT

I havea N4000 connect to a VA through a "HP Tachyon XL2 Fibre Channel Mass Storage Adapter" . The IP network was out (thre is just the core i/o lan) and during this time the system become slowly and generated the following error: Inquiry failed on FCP device. After the IP network was restored the system started working fine. How the IP network could affect the SAN? Is there any correlation? thanks"

Re: IP network and Fibre Channel

Steven E. Protter — Thu, 20 Nov 2003 13:30:48 GMT

The IP network should not affect the san unless the Fiber card is connected as a LAN card to an IP switch.

fcmsutil /dev/td0 stat

See if there are major errors. The fiber card might be going south for the winter.

SEP

Re: IP network and Fibre Channel

doug mielke — Thu, 20 Nov 2003 14:46:03 GMT

If using DNS, and the network is unavailable, system can slow significantly, even for non-networked functions.

If nsswitch ic configured for DNS first, the system will wait for a response for many functions, ( i suppose it's even possible to have DNS resolve localhost)

Re: IP network and Fibre Channel

Alzhy — Thu, 20 Nov 2003 15:42:00 GMT

Hmmm interesting.. the only thng that I know that would affect you is if you are running SecurePath 3.0B upwards which is now dependent (spagent?) on the network (or a loopback) fully up and running... Anither would be that you are runing IP over these FC cards (am not sure though if the XL2's support IP -- ie. IP over FC).. I am more familiar with JNI and Qlogic Cards which have the ability to run IP over FC at very high MTU's..