Switch for Distribution Layer

I need your expert opinions for selecting a switch for distribution Layer
My requirement is 24Gig ports @ dist layer which will connect to 3750?s for server farm. I don?t want to negotiate with the bandwidth.
Which switch will be best for this scenario with max Backplane speed

Yes L3 routing will there.
I am considering 3750 for access switch for my server farm, and 4506 for distribution layer with the following port requirement
Catalyst 4500 Gigabit Ethernet Module, 6-Ports (GBIC)
Catalyst 4500 GE Module, Server Switching 18-Ports (GBIC)
Catalyst 4500 Enhanced 48-Port 10/100/1000 Base-T (RJ-45)
Catalyst 4500 Supervisor IV (2 GE), Console (RJ-45)
Most of the gigabit port will be occupied since I have a huge server farm to connect. By using almost all the ports on 4506 will I be able to get the maximum through put??
I have not considered 6500 due to budget. If I consider 6500 will it be a good design to have 6500?s on both core and distribution layer

Similar Messages

Switches for Access, Distribution, and Core Layer

I have this case study in school and we are tasked to build a network in a school. So we've decided to use the three layer hierarchical model. I'm not sure about what switch is best for these layers but I've decided that I'll use 3750 for the Access layer, 4500E for the Distribution layer, 6500 for the Core layer. Are these the ideal switches for each layer? If not, could you suggest any switch that is better than the current? Need your suggestions or thoughts about this. Thanks in advance!

Hi Seb, thanks for replying. My groupmates and I have already decided that we're going to have a distribution layer. So basically, is 3750 enough to be the backbone/core of the network? We're configuring the to have a Layer 3 design so that makes me choose on 3750 on distrib and core rathen than 2960 switches cause I think that's better than Layer 2 though I don't know specifically what makes it better. Do you know? So I could have a thorough explanation when I present it to my professor. As for the budget, the case study didn't give us any limit so I think layer 3 would be a better choice than layer 3. Thanks Sib, appreciate it.

Why access switch has flapping lead another distribution layer switch has root guard blocking and unblocking log

is it misconfiguration in Access Point's access switch or hacker attack from this switch?
many MATM-4-MACFLAP_NOTIF Host 0015.5dc1XXX VLAN 1 is flapping between port 1 and port 2
many MATM-4-MACFLAP_NOTIF Host 0015.5dc2XXX VLAN 1 is flapping between port 1 and port 2
many MATM-4-MACFLAP_NOTIF Host 0015.5dc3XXX VLAN 50 is flapping between port 1 and port 2
many MATM-4-MACFLAP_NOTIF Host 0015.5dc4XXX VLAN 50 is flapping between port 1 and port 2
last time we do not have these switch also meet the same issue about distribution layer switch have many ports down
last time someone mention a switch lost config, but today, i remember that the switch has reloaded and can be login again with radius,
today i do not connect any notebook with this switch and just have configured radius setting for window NPS radius server and then reload, then
i have dinner and come back and after a while, last time's issue happen again.
it seems port channel easy to have problem when abnormal traffic coming from access switch result in down port in distribution layer switch
i wonder whether someone can hack through the switchport access mode port and send some broadcast message

From that output and your description it looks like you have an STP issue as a result of misconfiguration somewhere.
Are your access points connected to switches with ports in access mode or trunk mode?

Multiple account assignment switching between distribution indicators not working for service

Hi Gurus,
Account assignment distribution function not working post ECC6 patching activity
we have recently completed ECC6 patching actvity and we are facing issues on processing multiple account assignment in service.
we create Purhcase order with single account assignment and will process service with Multiple account assignment selecting distribution on qty or percentage basis till patching functionality works fine post patching we are facing issue when we are selecting distribution indicator system provides an error message switching between distribution indicator is not allowed when we continue system ask to enter in case of multiple account assignment select the distribution indicator. could you please suggest me on the issue.
Thanks in advance.

we have found a SAP note
1915000 - SE685 - Switching between distribution indicators is not allowed
This is now standard behavior.

Bandwidth from Access Layer to Distribution Layer

Folks:
I am currently on Chapter 12 of “CCNP Switching 642-813, Official Certification Guide” ISBN: 978-1-58720-243-8. I am currently not grasping the three layers entirely, and I was hoping someone could offer insight in a different way.
I believe I understand, that switches in the Access-Layer can be layer2 devices (2950, etc), and devices in the Distribution Layer should be Multilayer devices such as Layer-3 switches (3750) and inter-vlan routing takes place at the Distribution layer. But what I do not understand – how does one account for bandwidth and traffic from the Access Layer switches to the Distribution Switches?
Let use a 24 port 2950 switch located at the Access-Layer. If everyone was online and communicating, the total traffic for the switch would be 4.8 Gbps. The latter is due to each port providing 100 Mbps but in Full-Duplex, so (100*2)*24. So, how does an engineer spec out the required uplink ports from the Access Layer to the Distribution?
I am sure this is easy; however, I am not getting the concepts. Any insight is great.

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As noted by Peter, edge hosts don't generally all concurrently push/pull their full port bandwidth for substained periods. However, host bandwidth usage often varies much by "kind" of host. For example, many server hosts are "busier" than most user hosts, so when designing networks you normally design for lower oversubscription ratios for server hosts than for user hosts. Old rule-of-thumbs ratios suggest oversubscription ratios of about 8:1 to 4:1 for servers, and about 48:1 to 24:1 for users.
Keep in mind that oversubscription ratios can be "skewed" by what the host is doing, i.e. not all server or user hosts have similar bandwidth demands. For example, your primary mail server or primary file server might be much "busier" than other server hosts. Likewise, some user hosts might be much "busier", for example, years ago I supported a LAN segment of CADD (20) workstations which had more traffic on their local LAN than the (2,000 user) corporate backbone.

Spanning vlans across access switches in distribution block.... please help

Hi All
Can someone please explain why Cisco states that in a Campus Hierarchical modle if Vlans are spanned across Access switches in a distribution block, then the Distrubution to distribution link should be Layer 2. Is this really necesary or just a recommendation, and if so why? Can't this link be a L3 link when spanning vlans across Access switches in distribution block, as I understand the benefit of having a L3 distribution to distribution link so that SPT is avoided.
Please help

Hello,
The cisco recommended design is L3 links, but these is only possible if you have no vlans you need to span over the hole network.
It depends on your topology or what you want achieve.
If you need for one or more vlan's spanned the LAN, you need to use a layer 2 connection between all switches and between distribution too.
In my company we have for example a few vlans for restricted areas, like device management or else, so we can't use L3 Links in the distribution area because these vlan's are terminated at the firewall. I think these is good thing.
I would recommend you if you don't have to span one or more vlan's across the network to use L3 Links, specially in the case of redundancy way's. So you need no spanning-tree, but need to use other protocols like GLBP or else. The works faster and are not so confusing (for some people) as STP.
best regards,
Sebastian

Identification of Core and Distribution Layer Design

Hi
I am a CCNA certified and I am doing a job as an IT technician here in UAE. I'm the only IT person in my company. Having no prior experience in networking field, I find myself in a pickle. With the help of CDP, I have figured out the network diagram. I am told that there is a COLLAPSED CORE network running in my company. I cannot identify the Core switches here. My question is how to identify the the core switches? We have two internet connections in two separate buildings. Can somebody please help me out. Please..

Generally speaking with a L2 access layer to L3 distribution switches the default gateways of the vlans are on the distribution switches.
The core switches are used when you need to interconnect multiple distribution switches eg. a campus LAN type environment.
In many sites if you only have one building the core and distribution switches are the same pair of switches but to be precise the default gateways are not on the core but the distribution switches.
If you have a separate pair of core switches you usually connect your distribution switches using L3 links so again the STP root for the vlans would actually be the distribution switches for the vlans they route for and not the core switches.
Separate core switches are basically just a high speed interconnect between your distribution pairs and should be left to do that so the routing between vlans, acls etc. are done locally on the distribution switches and only traffic for remote vlans/IP subnets ie. those on other distribution switches would go via the core switches.
If the same pair of switches is used for both functions then all routing between vlans and routing to remote networks is done by that pair.
Jon

Best/Easiest Practice for Distribution of Webhelp files for Fat(ish) Client Application

So another in my long line of questions in trying to change the implementation of the help systems at my new employer.
So, the pressure is to convince the existing guard to toss out the old method and go with a new method... One of the issues has come up for CSH Webhelp (via RH10)...
Apparently, in the old method (where every help topic was it's own CHM - no, I'm not kidding). They kept it that way so that any time a help file was updated, they could just send out that one chm to update that one topic.
Now they are worried that if we switch to webhelp using topics in one single big project that we can't just send out a single updated file any more...
So I'm trying to get ammunition as to how updates to the help can be distributed without it being a big hassle...
We do have small updates that go out about every week, and they are afraid that going to the webhelp (1 project with lots of topics) method will require more time and effort for the techs because they will have to complete the update of a huge help system every time.
One solution we have suggested is that we only update help files on major releases and add any changes to help procedures in the Release Notes or in a separate PDF and also include a note that the help files "will be updated to reflect this change in the XX/2015 XYZ Release).
Does ANYONE have any other ideas of how distribution could be done efficiently so that we don't have to continue this "project per topic" fiasco?
HELP!!! PLEASE!!!!

Amebr - you hit the nail on the head... i want to apologize to everyone for all this mass hysteria...but this has been a freaking rollercoaster... one day they are happy with the plan, the next day they decided they want to complicate it more... So now my job is to find out how viable and how tricky and perhaps how dangerous it will be to send out JUST the files that have been changed. Especially for CSH!
Anyone have any experience with this or have any advice? Peter? I suspect you might know how this might work... are they any pitfalls to watch out for.. I just have this fear of sending out a few files from an entire project... Altho, it appears when I publish, ONLY the files that have been edited in some way show a new date.. that includes non-topic files - so i'm assuming sending all those will keep the TOC, Index, and Search features working properly... as well as incoming and outgoing links from an edited topic?
Another question would be how to handle new images in a project... as the image folder tends to be the largest, i don't want to have to send the entire image folder... Thoughts...???? Advice? Jeff? Peter? Amebr? Bueller? Bueller? Bueller....?
THANKS!Best/Easiest Practice for Distribution of Webhelp files for Fat(ish) Client Application
OH... and Jeff... my apologies for the misnomer of using the term "Fat-ish" client in reference to this... I totally misspoke and should have said Mobile App... but in my mind, any time you have to download something to use it, it's a fat client... sorry! :-/

Switching for Cisco IPT

Here is a question a customer emailed me today
" so im looking at the Cisco IPT solution and its impressive. after noticing the costing, i see no way of justifying the switching infrastructure. our entire organization is based on dell switching and Cisco routers.
we intend to stay with this as our switches are new has QOS and POE enabled as well as IEE power compliant as i understand and will work with the Cisco Phone models. we can also acheive the same measure of redundancy as proposed in the 3-layer model that Cisco applies. please advise as to if there are any limitations of these switches as i cannot see any at this point in time"
from a pre-sales prospective how do you justify changing to Cisco, and more importantly, from a TECHNICAL prospective do we convince the customer to change or leave?

In terms of implementation and operation: if you follow the separate VLANs for voice and data model - which you probably should - you will have to manually set the correct VLAN on every phone in the phone settings. phones use CDP to discover voice VLAN. I've done a deployment with non-Cisco switches such as this, and it definately slows things down. Of course you don't want to hurt any feelings, but... there is a reason Dell was giving away their switches for free a few years back. I like to save money too, but I wouldn't stake my business on running critical infrastructure this level of switch.

NAC for wireless layer 3 oob

Hi,
Anyone implemented nac for wireless layer 3 oob? This is using nac appliance not ise.
What I did is to configure wlc as per layer 2 oob setup. Configure svi 669 (authentication/quarantine vlan) on switches that’s with the wism. Pbr all vlan 669 traffic to test cas untrusted interface.
Problem now I’m not able to get an ip from dhcp after associating. DHCP works when tested on wired. Is there any additional config to be done on WLC or am i doing it right??
The test cas/cam are ugraded to ver 4.8.2.
Regards
Joachim

Everyone can do a mistake and it seems I did a big one :-)
l3 wireless OOB was not supported until last version :
§Wireless L3 OOB RIP has been introduced in 4.8.2.
§In order to support wireless in L3 OOB RIP deployment – DHCP release and renew values were propagated from CAS to the client so that client can perform IP refresh.
§The configuration of WLC and AP’s needs to be done like in Wireless L2 OOB VGW deployments.
§There are no ports in WLC hence Port profile is not required
§WLC allows only two VLAN’s namely Quarantine (Auth) and Access VLAN’s. Hence the support for User role Vlans is not there in Wireless deployments.
§iPhone/iPad support is also not present. Reason being IP address cannot be refreshed in iPhone/iPad due to lack of support for Java Applet/ActiveX.
§The authentication trap control needs to be checked in order for the WLC to send 599.0.4 trap.

Cascade Catalyst 3560 switch for loaded traffic

I have a layer 3 Catalyst switch 3560 with 24 FE interfaces.
I need to pump traffic from traffic generator into port 1 and propagate it to other ports; the last port will be connected back to the traffic generator.
I suppose that I need to cascade some of the switchports but how do I configure the catalyst switch for this setup? Is it making use of routed port and static routing?

Hi Ankur,
Thanks for the reply.
The traffic generator are layer 3 interfaces which I can assign IP address.
You mentioned that I do not need any routing, but I require traffic coming from the traffic generator(e.g FE1) going into switchport 1 to traverse through the rest of the switchports before exiting from the last switchport back to the traffic generator(e.g FE2). Therefore, I need advice on how to setup the catalyst switch to achieve this.If I assign ip address for this traffic to end at the traffic generator-FE2, the generated traffic will enter the switch at switchport 1 and directly exit from the last switchport without any traversing done. Btw, do I need to cascade my switch with cross cable in this aspect?
Thanks in advance for your advice.
Regards,
Raymond

Dhcp on switch for vlans

if I setup 2 scopes on my layer 3 switch for my vlans, and i put each vlan in one of the scopes, will each vlan only recieve the addresses that the scope is set to that relates to the interface subnet ip ?
thanks

Hi Carl,
that is correct.
HTH,
Bobby

Remote deployment switches for Jabber 9.2.2

Are there any installation switches for remote install via the MSI/DMG?
I will be pushing this backage via Dell KACE K1000 appliance and would like to configure default options for the users during the install/upgrade such as Disabling (or 'unchecked' following initial sign-on) the Docked Window, configuring Phone Accounts, WebEx Meeting and application Integration settings.

application integrations setting mostly get pushed out through the profiles on CUPS that get pushed out as soon as the user logs in.
I can't help you out with all the switches you asked for but, you can starting using:
msiexec.exe /i "\\lsrftufs1\ict\Networks\Voice\Jabber\Jabber 9.2.2\CiscoJabberSetup.msi" TYPE=CUP DOMAIN=somedomain.com.au LANGUAGE=1033
This will at least use auto discovery of the presence server if you use an SRV record _cup._login.somedomain.com.au
so at least your useers wont have to type in a presence server name or IP.
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Time Capsule - Can it run as DHCP router, create a wireless network and plug into switch for wired network all at the same time?

I have a closet with Wired connections from all over the house terminating in it. I also have the internet modem and a switch in this closet. My old setup was a netgear in the closet creating a wireless network and also feeding the Ethernet ports all over the house. In my room, I had an Airport express (a month old) bridging the wifi to make the wifi network larger. The Express was hard wired from the wall and my mac mini was using it's wifi (printer was plugged into other ethernet port). Everything was working great.
Fast forward to last week. My Netgear died. So, I bought a time capsule. My plan was to move the Express to the closet and have it create the wifi network and also then run cat 5 cord from express to the switch to feed all the wired wall plugs. Reset it and set it up to create the wifi network as well as DCHP NAT. Wireless was running great on it. Then I plugged in the Cat 5 in the second Ethernet Port to the switch. Wifi stopped working and none of the computers would connect using wired connections either. They would see a 'network' but nothing would work. I would unplug the Cat 5 feeding the swtich and the wireless would start working again. Plug the Cat 5 back in and wireless would stop.
So I thought I would try the Time Capsule in the closet and see if I could get it to work. Pretty much the same thing, except at this point I figured out if I went in and told it NOT to create a wifi network the wired portion worked fine and all the wired computers in the house worked fine. Of course, then I didn't have Wifi.
I'm not clueless when it comes to networking, but I can NOT figure this out! Can either the Time Capsule or Express Create the wifi network AND also feed the data to the switch for all the wired computers?
To simplify this is what I want my end result to be. I prefer the Time Capsule to be the wireless connection extender, but if I have to have the Express do it, I'm fine with that.
1. Express in the closet creating the wifi network as well as feeding the data to the wired connections via my switch.
2. have the Time capsule in my room at the opposite end of the house plugged into the hard wired connection to extend the wrieless network as well as have wired connections such as my printer and my Mac Mini.
If I can get #1 to work, I don't think I'll have any problems with #2. Help!

I have an equally complex setup with a managed switch actually but I have never seen the TC have this kind of issue.
What I do notice is you have changed the TC from defaults.. you are using a non-default IP range.
I have run across issues like this where people move things from default.
I would like you to start over.. factory reset the TC. That will set it back to default router mode.
Do the min setup on the TC..
1. Change all names from what you were using. That includes the TC name and wireless name/s
Make them short, no spaces and pure alphanumeric because that is the correct way to network. Apple default names with spaces and apostrophes are fundamentally bad.
2. With just the TC plugged into the switch.. and a single computer connected by ethernet. Power cycle the whole network.. this allows the switch to clear all the old MAC address.
3. Test on the computer just ethernet. Turn the wireless off.
The computer must use dhcp and must get an ip from the TC.
It has to get the correct Router.. ie Gateway.. I wish apple could stick with proper network terminology.
And it must get same address or valid DNS server address/es.
If it fails.. please plug ethernet directly to the TC.. bypassing the switch.
You should get the standard IP addressing and internet connection.
If not please post the screenshot from the Mac of the network preferences showing the ethernet setup.
I need to see what address it does get. I need you to make sure the ethernet is the TOP of the list. So rearrange the order of network connection. With the airport off it should just go to the top of the list.
If it appears to be working .. but a browser cannot connect, open a terminal and ping an internet address.
Ping the actual gateway address the ISP gives you and ping the ISP dns address.

How do i create an animation with one frame for each layer?

I have 76 sequential images that i've loaded as layers using bridge, then aligned using photoshop.
I would now like to create a 76 frame animation with one animation frame for each layer
(the layers are in sequential order).
is there an easy way to do this
or do i have to create 76 frames (can duplicate multiple to speed it up)
then set layer visibility for each frame?
thanks
bill w
astro.whwiii.net

thanks for all the replies
got it
here's a rough draft of 2 hours of sunshine
http://whwastro.homestead.com/files/big/31-05-2014-prom-animation.gif
-bill w
astro.whwiii.net

Switch for Distribution Layer

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