Subject: [imss] Last Call comments on draft-ietf-imss-fc-zs-mib-00.txt

From: [email-masked]
Date: Thu, 14 Sep 2006 11:07:31 -0400

Section 3 is not a "Short" Overview of Fibre Channel ;-).  It could
usefully be broken into 3 subsections:
- Overview
- Zoning
- Zoning Configuration and Management

The first paragraph describing zoning says:

   Zones within a fabric provide a mechanism to control frame delivery
   between Nx_Ports ("Hard Zoning") or to expose selected views of Name
   Server information ("Soft Zoning").  This technique is similar to
   virtual private networks in that the fabric has the ability to group
   devices into Zones.

It needs an additional few sentences to explain what a zone does and
where it's enforced, specifically to make the following points:
- Communication is only possible when the communicating endpoints
	are members of a common zone.
- Hard zoning and soft zoning are two different means of realizing
	this.  Hard zoning is enforced in the fabric (i.e., switches)
	whereas soft zoning is enforced at the endpoints (e.g., HBAs)
	by relying on the endpoints to not send traffic to an N_Port_ID
	not obtained from the nameserver with a few exceptions for well
	known N_Port_IDs used to bootstrap the fabric (e.g., talk to the
	nameserver).

Section 5.4 ought to explain how an SNMP management client can determine
whether a fabric is operating in basic vs. enhanced mode.

Thanks,
--David
----------------------------------------------------
David L. Black, Senior Technologist
EMC Corporation, 176 South St., Hopkinton, MA  01748
+1 (508) 293-7953             FAX: +1 (508) 293-7786
[email-masked]        Mobile: +1 (978) 394-7754
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