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Yeah, this is what I was
thinking of... but we'll be using only Gen2 fabric modules. I was
conflating that with interface modules. Still gonna ask my local SE...
:)<br>
<br>
Thanks!<br>
<br>
-Brant<br>
</span><br>
<br>
<blockquote style="border: 0px none;"
cite="mid:4F8B38D4.5020703@interware.hu" type="cite">
<div style="margin:30px 25px 10px 25px;" class="__pbConvHr"><div
style="display:table;width:100%;border-top:1px solid
#EDEEF0;padding-top:5px"> <div
style="display:table-cell;vertical-align:middle;padding-right:6px;"><img
photoaddress="tcsillag@interware.hu" photoname="Tamas Csillag"
src="cid:part1.02090500.00060406@networking-architecture.com"
name="compose-unknown-contact.jpg" height="25px" width="25px"></div> <div
style="display:table-cell;white-space:nowrap;vertical-align:middle;width:100%">
<a moz-do-not-send="true" href="mailto:tcsillag@interware.hu"
style="color:#737F92
!important;padding-right:6px;font-weight:bold;text-decoration:none
!important;">Tamas Csillag</a></div> <div
style="display:table-cell;white-space:nowrap;vertical-align:middle;">
<font color="#9FA2A5"><span style="padding-left:6px">April 15, 2012
5:08 PM</span></font></div></div></div>
<div style="color:#888888;margin-left:24px;margin-right:24px;"
__pbrmquotes="true" class="__pbConvBody">Accoring to the BCSPNE study
guide:
<br>
<br>
<br>High-speed Switch Fabric Modules
<br>• Gen-2 high-speed fabric (hSFM) modules support wire-speed
forwarding
for all packet sizes, including
<br>jumbo frames
<br>• hSFM modules are supported on Brocade MLX Series and Brocade
NetIron
XMR routers, and are
<br>interoperable with all existing interface module
<br>• hSFM modules are hot-swappable, which means you can install or
replace
them while the system is
<br>powered up and running
<br>• hSFM modules can operate in normal mode or turbo mode but will
boot in
turbo mode only if all active
<br>interface modules are Gen-2 module
<br>Note
<br>Gen-1 switch fabric modules and Gen-2 hSFMs are not compatible and
will
not operate together in
<br>the same device.
<br>
<br>Managing Switch Fabric Modules
<br>High-speed Switch Fabric Modules can operate in Normal mode or Turbo
mode. Standard switch fabric
<br>modules (SFM) can only operate in Normal mode. The hSFM module is
classified as a G2 module and SFM
<br>module is classified as a G1 module.
<br>When operating in Normal mode, the system uses fixed size cells
across
the backplane. When operating in
<br>Turbo mode, the system uses variable size cells across the
backplane.
Turbo mode provides higher
<br>performance since it is a more efficient mechanism of sending cells
across the backplane.
<br>The system selects the operating mode for switch fabric modules at
startup, or when the first switch fabric or
<br>interface module is installed. The system uses this mode for all
modules
that are subsequently installed.
<br>hSFM modules will boot in Turbo mode only if all active interface
modules are G2 modules. In a chassis
<br>loaded with G1 and G2 modules, the hSFM modules will default to
Normal mode.
<br>If the system fabric mode is changed to Normal mode from Turbo mode,
or
vice versa, the system will not
<br>change the current operating mode unless the chassis is reloaded.
<br>The switch fabric modes have the following restrictions:
<br>• The system blocks discovery of any standard switch fabric (G1)
module
if you have issued the
<br>system-init block-g1-sfm command.
<br>• If the system is operating in Turbo mode, standard switch fabric
modules (G1) and standard (G1) interface
<br>modules are automatically blocked.
<br>• If there are any active G1 switch fabric modules, G2 interface
modules
are blocked.
<br>• If there are any active G2 interface modules, G1 switch fabric
modules
are blocked.
<br>
<br>
<br>Since this is just a study guide, I'd ask a Brocade rep, just to be
sure.
<br>
<br>Tamas
<br>
<br>
<br><br>
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</blockquote>
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