DELL-ScottH Welcome everyone to this weeks chat. Thanks for joining, we have Victor Teeter from Openmanage Network Manager, Engineering Lead, and Bruce Holmes from Powerconnect Engineering. James Meeker should be joining in a few, Product Manager for Powerconnect .....

DELL-ScottH

This topic was suggested by Geoff (gsherman) .. so Geoff do you have items you'd like to bring up for discussion ? ... and anyone else is welcome to chime in as well

gsherman

Yeah I have a few just to give some background on what products we use

gsherman

6248, 3548, 2724, etc

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DELL-ScottH

welcome jack !

gsherman

We are wondering if there is a better way to configure a redundant topology to allow for our Nas to interact with 2 seperate stacks of 6248 Switches currently we have one stack of 2 however in a master failure scenario the stack is forced to reboot

DELL-ScottH

use "action" -- "recent room history" to catch up

gsherman

This causes Iscsi devices to become disconnected

DELL-ScottH

bruce, any best practices, papers, articles, on this scenario ?

gsherman

Fyi the Nas unit requires an Lacp Lag to be established via 2 10gbps Fiber links

gsherman

How would Dell setup a storage unit to connect to Powerconnect Switches say consider an Iscsi San

DELL-BruceH

I would suggest standard practices. The Nas probably has redundant controllers. So run one to each stack. Am I missing something?

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gsherman

Yeah in order to failover in the event of a stack failure it will need a Lag setup between its 2 interfaces

DELL-ScottH

welcome James !

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DELL-BruceH

A lag setup between what 2 interfaces? the switch? the nas?

gsherman

Sorry Nas has 2 interfaces Ag1 and Ag2 for arguments sake

gsherman

Each of the 2 6248 Switches has an Xfp bay and 10G module

gsherman

Nas requires these 2 ports to be configured to a Lag via Lacp

gsherman

if the stack reboots due to master failure the slave switch reloads the config file and drop all connections until it boots back up

gsherman

this is by design so what we would need is 2 seperate stacks but is there a better way

DELL-BruceH

got it. If the nas requires an lacp lag, and does not have another set of redundant interfaces, then you are lagging it to a single logical switch (the stack). the stack is a single point of failure even if you are going to different switches in the stack. The single lag from the nas is also a single point of failure. To get redundancy, you need another interface from the nas to another switch (or stack).

gsherman

understood, how will Ip Addressing Match up to this unit basically provide a different Ip for each interface I suppose

DELL-BruceH

you would have to see what the nas requires for redundant interfaces. There would not be any switch requirement.

gsherman

got it

gsherman

I will look further into the Nas, if you have a sample of this setup I wouldn’t mind seeing it

james_h_meeker

You could also get a pipe between two L3 switches to create redundant fabric

DELL-BruceH

Is it an equal logic or Dell nas?

gsherman

No not in this case Blue Arc

DELL-BruceH

If not, I am sure the nas vendor has example configurations.

gsherman

Would there be convergence time in the redundant fabric

gsherman

while an example with Md3000i or Equallogic would be fine

DELL-BruceH

yes. but it would not be dependent on the switch. it would be dependent on the nas.

gsherman

the convergence time? Vrrp?

DELL-BruceH

can someone from Dell track down an Eql or Dell redundant nas config paper?

DELL-BruceH

Vrrp convergence time would be on the order of seconds. It would depend on how you configured it.

DELL-BruceH

I need to go to another meeting. I will try to stay on.

DELL-ScottH

ok, thanks bruce

gsherman

Thanks Bruce any thoughts on the priority of the 18lag limit per stack

DELL-ScottH

Victor, on the Omnm front, can you explain some of the features it provides over using simple web based interface ?

gsherman

We are really just using standard open manage

gsherman

we can pull the switches in this way

DELL-BruceH

lag limit is going to 24 in 2.1 firmware

gsherman

network manager is for larger installs no?

james_h_meeker

We have a number of white papers posted on the Eq site regarding disaster recover, Disaster Recovery and Business Continuity located at the following link: http://www.equallogic.com/resources/whitepapersview.aspx?id=550

gsherman

any other killer features on the roadmap

gsherman

james good link thanks i will sign up

james_h_meeker

Omnm does require a dedicated system to install it on.

DELL-ScottH

Fyi, here's a starting point for info on Omnm --> http://www.dell.com/content/topics/global.aspx/sitelets/solutions/management/network_overview

gsherman

Powerconnect 5448 vs 6248 in regards to Iscsi is there anything of interest to point out

DELL-ScottH

anybody have questions ? .. feel free to jump in, or lurk, either way is fine.

gsherman

sorry for hogging

james_h_meeker

Yes, the 5000 series has been optimizes for iscsi

james_h_meeker

it will auto detect a iscsi traffic and set the queue to prioritize the traffic

DELL-ScottH

You're not hogging, just letting others know we can handle multiple conversations

dpetrovski

Does Dell open Manage supports Snmp Mibs?

gsherman

interesting without having a sperate Iscsi Vlan

james_h_meeker

You can also monitor your targets from the Web Gui in the switch, this is unique with Dell's Powerconnect switches

DELL-ScottH

@dpetrovski, yes, you can import Mibs into Openmanage Ita

gsherman

just the 5000 Series or will these optimizations apply to the 6248?

james_h_meeker

Separate Vlans can be created, but not auto-created. That's driven by your application needs.

DELL-ScottH

@dpet, are you thinking about management of other vendors switches ?

DELL-Victor

Yes, Mibs are supported fully in Omnm (network Manager) , but less so in Ita

james_h_meeker

Today it's the current 5K Series only that has the auto iscsi optimization

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SteveAudette

However, it should be pointed out that you can configure the 62xx series for iscsi optimization-it's just not as easy.

gsherman

Interesting any documents on this would be great if its out there

dpetrovski

Is it possible to gather individual interface statistics with Dell open manage for ex. I would like to know how much traffic going over link and have a history.

SteveAudette

(I'm from Dell's Powerconnect support. Been distracted by other things to jump in earlier!)

gsherman

Thanks Steve

gsherman

So we are in the Md3000/1000 vs Md3000i/equallogic debacle

gsherman

3 Servers running Sql and Oracle fairly high I/o and latency is key as these are hosting platforms with subsecond responses desired

gsherman

hence the Iscsi questions just not sure I feel the speed is there

gsherman

scalability is superb

DELL-Victor

You can gather network stats in Omnm, much more than you can in Ita. Omnm allows you to capture and display (graphically) any counter in the Mib.

gsherman

Nas doesn’t allow various raid types hense why its a Nas vs a San we need to simulate some Raid 10 sets for Db Luns

DELL-ScottH

we have some Equallogic boxes on order, hopefully here soon, look for some things on the wiki to contribute to

gsherman

yeah seems like a killer product but in cost comparison to the Md series its a tough call

gsherman

for a small group of servers

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DELL-ScottH

Victor - what are the futures of Omnm, new versions in the works ?

gsherman

Steve any thoughts on the 3548 and when the external Pw supply is key. We are looking to power roughly 20-30 Ip Phones basic digital screens. Is it possible to track strain on the Pw supply from Poe

SteveAudette

Yes. From within the web interface and the Cli you can get a reading of how much power is being drawn.

DELL-Victor

3.0.2 should be available in July timeframe and will provide full support for the 35xx and 54xx. This version is free for the first 10 switches, then licenses will be available for scaling.

gsherman

havent taken it out of the box yet

SteveAudette

(this would be on the 35xxp models)

DELL-Victor

Yes, 35xxp as well

gsherman

great

gsherman

anything we should know on configuring this switch for a Voip setup in concordance with our 6248? We are segregating the Voice Vlan

james_h_meeker

Ensure you have measured your power requirements for your Rps unit.

SteveAudette

Sorry folks. Gotta run to another meeting. If you have questions, you can feel free to write me at steven_audette@dell.com

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gsherman

Thanks Steven

gsherman

So another useful item would be some basic management and monitoring tutorials for the high end Powerconnect lineup

DELL-Victor

A quick overview, Omnm can discover, monitor, and manage all Powerconnect managed switches (6xxx, 5xxx, and 3xxx models). Monitoring, you can see a picture of the front of each switch chassis and lights that are on. Create a network topology map, captures traps and display them in event manager, create graphs based on data from changing Mib values the user selects. Managing, you can deploy firmware, backup and restore switches (one at a time or as a group).

gsherman

Victor that sounds pretty good can we use Omnm as is now for the 6248 free?

gsherman

where can we locate this

DELL-Victor

yes you can use it for all of your 62xx switches for free

james_h_meeker

We have a demo / tutorial available on-line: http://www.dell.com/downloads/global/solutions/training.swf

DELL-Victor

www.dell.com/networkmanager will allow you to download it free.

DELL-ScottH

We're coming up on the hour, thanks to everyone for joining, anything that didn't get addressed, please start a thread on the Dell Techcenter Community ... James, Victor, Bruce thanks for guest hosting .... Todd what is next weeks topic ?

DELL-ToddM

Next week we will be disucssing Running Sql Server 2005 on Vmware

james_h_meeker

Elvis &
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DELL-ToddM

Or more generally virtualizing Sql Server 2005

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DELL-ToddM

I have a whitepaper in the works that should be out by this time next week that addresses the topic

gsherman

Anyone familiar with the Md3000? I did have one or two ???

DELL-ScottH

and if you have any suggestions for future topics, please let us know

gsherman

Yeah I think it would be useful to get sneak peaks into what is coming

gsherman

tips and tricks from the support group

DELL-ToddM

What is your question about Md3000?

DELL-ToddM

We mostly have Md3000i in our lab.....

gsherman

sure so how can I determine if I am creating several virtual Luns how much space will be consumed

gsherman

I want to projects various size Luns of Various Raid Types and have them all run on the Md3000 with Md1000 addons

gsherman

is there a tool available to do this

gsherman

capacity planning etc

gsherman

can you expand a Lun once created

DELL-ScottH

so is this the question of Mb, Gb, and 1024 vs 1000

gsherman

negative

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gsherman

If I have 45 146gb Drives

DELL-ToddM

Not sure if there is a tool specific to Md3000

DELL-ToddM

Generally you can calculate useable storage based on Raid type that you select

gsherman

I create a Raid 10 Across 15 Drives another Raid 10 Across the Same physical drives how can I determine space available

DELL-ToddM

Raw / 2

gsherman

Basically I need to Create 3 500gb Raid 10 Luns 5raid 1 Sets at 200gb each
DELL-ToddM I don't remember if the Gui will tell you this during the creation or not

gsherman

Interesting it is possible to use the same physical disks on the Md3000 for multiple raid groups correct or am I misrepresenting

DELL-ToddM

There is a wizard to create the Raid 1/0

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DELL-ToddM

Physical drive can only be in one Raid Group

DELL-ToddM

Multiple Virtual disks can be defined for single Raid Group - dividing up the available space among them

DELL-ScottH

so from your description, looks like you need 5TB of raw spindle space to get your 3x500 and 5x200

DELL-ToddM

Have you seen the Disk Storage Manager tool for the Md3000 and Md3000i ?

gsherman

no not yet

gsherman

I read through the manual

DELL-ToddM

So it may be a litte confusing have just read the manual

DELL-ToddM

I haven't read the manual, but I have used the tool

DELL-ToddM

::biggrin

gsherman

is there a demo on this and its the same for the 3000i vs 3000

DELL-ToddM

(I actually read some of the manual)

DELL-ScottH

just researching for that now

DELL-ToddM

The tool is almost exactly the same for Md3000 and Md3000i

gsherman

Basically Todd the goal is high spindle count for Sql and Oracle in a Iscsi or Das scenario 3 Servers various raid group requirements

DELL-ToddM

There is basically an extra tab for iscsi on the Md3000i tool

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DELL-ScottH

www.dell.com/md3000i

gsherman

So basically to present 2 - 500gb Raid 10 Volumes with a spindle count of say 14 to a Server I will need to tie up 36 drives?

DELL-ScottH

wrong link .. use this one -- http://www.dell.com/content/products/productdetails.aspx/pvaul_md3000i

gsherman

I will watch these for sure

DELL-ScottH

bottom right of page "interactive training"

DELL-ScottH

no

DELL-ScottH

you create the raid groups (disk spindles), then carve Luns from that group

DELL-ToddM

You assign the physical disks to a Raid group, then carve out the 500 Gb slices

gsherman

Perfect Clear now

DELL-ScottH

so you can have multiple Luns per Array disk grouping

DELL-ScottH

yeah, terminology sometimes confuses

DELL-ToddM

I have used Md3000 for Exchange and Sql testing - assigning Log and data Luns much as you are wanting to do

gsherman

So realistically I want a 1TB Raid 10 and I want 2X 500gb Luns

DELL-ScottH

useable?

DELL-ToddM

1 Tb useable or 2 Tb raw

gsherman

useable

DELL-ToddM

these are the same thing

DELL-ToddM

with a Raid 1/0

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gsherman

yeah

DELL-ScottH

just buy a bunch and send what you don't use to me and Todd, we need it in the lab :-)

gsherman

I will watch the demos just wasn't sure on calculating disk size and spindle count

gsherman

yeah will send those pronto 15K only

DELL-ScottH

k, the interactive demo will help

DELL-ScottH

for sure :-)

DELL-ToddM

Let us know if you have any questions after you check out the demo

gsherman

should let me see what I can do if I sent you guys exact requirements could it be simulated in the lab

DELL-ScottH

sure, I could knock out a camtasia screen capture on my md3000i, I've got free disks on it right now

gsherman

great scott what you email I will provide a better idea

DELL-ScottH

yes send me an email scott_hanson@dell.com

gsherman

whats*

DELL-ScottH

that's an underscore in there

gsherman

thanks got it

DELL-ScottH

thanks for joining and keeping the conversation going, later

gsherman

yeah we are glad to have a venue for the back and forth questions

gsherman

anyways I will send you an email in a bit

DELL-ScottH

glad to be of help, spread the word about the Dell Techcenter, we are trying to grow

gsherman

ok

DELL-ToddM

Thanks gsherman

DELL-ToddM

Talk to everybody next week!