Re: HMC Question, Private LAN netmask

Rob,

I guess you would put me in that 'Paranoid' group. Likely this comes from the early days of HMC where mistakes bit back hard. In addition since that connection is to an absolutely positively critical piece of my infrastructure I simply am not interested in that communications being disrupted. Keeping it on a private network reduces the chances that will happen. Having said that I have no issue with a properly built VLAN (or physical lan if you prefer) that contains all my FSPs and HMCs and I have customers who have extended that VLAN to other facilities for more HMCs and FSPs. This provides HMC redundancy between facilities and gives me the flexibility to add more FSPs by simply allocating ports in the switch. As for being able to get to ASMI from anywhere in the network without going first to the HMC, not gonna happen in my networks.

- Larry "DrFranken" Bolhuis


On 12/16/2010 11:46 AM, rob@xxxxxxxxx wrote:

I know that some feel that the connection between the HMC and the FSP
should be on some private network. I've never been that paranoid. I put
all my FSP's on the same subnet (while they are in the same building) that
the HMC's (and some other equipment) are on.

I can ping the FSP's and HMC's from any PC in our intranet.

Doing this makes it easier to share HMC's between racks. And, finally,
we're planning on moving our backup rack offsite. We'll have one hmc in
one city and one in another and want to be able to control either rack
from either HMC.

Rob Berendt