Routers / Switches :: Uplink Ports Used For ISCSI?

Nov 15, 2012

We have a single HP 2810 switch being used for an iSCSI SAN.We want to replace it with dual higher end switches.But we've got another SAN to also setup now - Dell Equallogic PS6010E - that has 10gb iSCSI SFP+ ports.Can the 4 x SFP+ uplink ports on the Dell PowerConnect PCT5548 or the HP 3800-48G-4SFP+ switch be used for just the 10gb iSCSI, while the other 48 handle the 1gb iSCSI?We were told the uplink ports don't have buffering, making them bad ports for iSCSI traffic and only useful as uplinks to another switch.We only need 8 x 10gb ports (4 for 2 servers, and 4 for the Equallogic SAN), so if the above would work, it would probably save us $10,000 from having to buy a separate 24 port dedicated 10gb switch to handle it.

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Cisco Switches :: SG500x How Many 10GE Ports Can Be Used For Uplink

Apr 25, 2013

i was checking the datasheet of 500X series and got confused regarding the 10GE uplinks. how many 10GE ports can be used for uplink and which transceiver should be used for 10GE copper uplink? for example, SG500x-24 switch has 24GE ports and 4x10GE uplinks. can i use the 4x10GE ports for uplinks or only 2 ports are for uplink and the rest for stacking?

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Cisco Switches :: SGE2000 Best Switch For ISCSI / Basic VLAN?

Jan 19, 2013

I currently am using the SGE2000 switches for our datacentre and they have run great. We are looking at replacing them as part of our normal equipment refresh and have questions about what is the best switch for us. We are looking at upgrading to at least 48 port switches which isn't a huge issue.The main purposes of the switches will be for iSCSI traffic between Starwind SANs and Vsphere 5.1 hosts. We had some latency issues with one of the SGE2000s but otherwise they've been great.
 
We also will use these switches to handle our feeds from our ISP and our normal interserver communications. We have had DDoS attacks in the past of 40k packets per second and 600mbps and the SGE2000 never even flinched. We don't need it for any layer3 routing (which we use virtualized PFsense for). Looking at the Miercom report the SG200 series looks like it would be fine for us but I'm just worried around the part which mentions it becoame unresponsive in a DoS attack and also whther it may be slower for iSCSI. Both series seem to support flow control and jumbo frames.

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Using SFP+ Uplink Ports On A Switch?

Mar 19, 2013

I have a question regarding uplink ports on a switch. Specifically the SFP+ variety. Could these uplink ports be used to connect directly to a fileserver? To be more specific, would the uplink port on the HP 3800 Switches connect directly to a file server that has the SFP+ card installed?

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Cisco :: Supervisor 2T Uplink Ports?

Dec 31, 2012

So the 2T comes with 2 10GE and 3 GE uplink ports. Can you use all 5, one or the other, a mix, or what? How does that work? It's not really clear from reviewing the products webpage or data sheet.

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Cisco Switching/Routing :: Why Nexus 2k Has 8 Uplink Ports

Dec 9, 2012

Why the nexus 2k has 8 uplink ports ?
 
the nexus 7k or 5k can be devided into 4 virtual devices  ( using vdc)and making 8 uplink ports in the 2k will allow us to use the extender for all the 4 vdc's with 2 uplinks ( for redundancy ) from each vdc   

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Cisco Switching/Routing :: CRC Errors On Uplink Ports To Nexus 7000

Oct 31, 2011

we have several uplink ports on a verity of cisco switches connecting to the nexus 7000, recording CRC errors.most are trunked ports with the following configuration. [code]

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Cisco Switching/Routing :: 3750x 12.2(58)SE2 IPBASE 10gb Uplink Ports Not Being Displayed

May 28, 2012

we have just purchased a few 3750x's that we intend to add to our 3750g stacks.  We've purchased the 10gb uplink modules, C3kx-nm-10gt, but when they are installed they are not appearing in the switches web gui nor can you configure them correctly.  If we upgrade a 3750x to 15.0.1 they seem to work fine.  All of our current 3750g's are running 12.2(58)SE2 IPBASE so we don't really want to have to upgrade them all to 15.0.1
 
Are we missing something or do the 10gb modules only work properly with ios 15.0.1?

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Cisco Switching/Routing :: 4500 - Redundant Supervisor 7-E - Use All Uplink Ports At Same Time

Dec 15, 2011

I know in the past on earlier models of the supervisors that you couldn't use all eight uplink ports(4 on each supervisor) simultaneously when you have two supervisors on the chassis.  Is this the same case for the 10Gb uplinks on the supervisor 7-E on the 4500 chassis?  I tried doing my research but couldn't find an answer.

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Routers / Switches :: How Do FPS's Open UDP Ports

Nov 29, 2011

How do FPS's open UDP ports without needing to configure the router to forward them?I never have to forward ports from my router to my PC. Every game i have somehow manages to open the UDP ports it needs without me having to configure my router. Yet when i check to see if those ports are open (prior to starting the programs) they always come back as blocked or closed. Now I'm currently working on a UDP Internet program and need to know how to do the same thing - open ports on a router without having to make the customer configure their routers. I'm THINKING that other programs start with a TCP/IP connection on the desired port and that opens the UDP port. Is this the answer or is there another method used?

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Routers / Switches :: How To Forward Ports

Sep 17, 2011

how to forward ports using routers

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Routers / Switches :: How To Open Three Ports

Jun 25, 2011

to access VOD database i must open three ports on the router - not sure how to

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Routers / Switches :: Block Multiple Ports On Only One Ip?

Oct 4, 2011

how can I block multiple ports on only 1 IP Address while not blocking those ports on other IP Addresses. I am using a Netgear WNR2000v1 which assigns the IP Addresses to each device.

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Routers / Switches :: Adding More Cat 5 User Ports At Tv

Jan 25, 2011

I currently have 1 cat 5 jack at my tv/entertainment area and will be needing additional jacks to add gaming consoles,streaming video player and internet ready tv at the same location.The current jack installed at that location is coming from a D-Link 8 port Gigabit switch installed in a different room.The switch is at capacity,all ports are full,so no additional availability there.My question is how to expand port availability at the entertainment area.Is it possible to put another switch or hub at that connection?Would there be a conflict with cascading a switch from one to another? I have a 25 meg fiber optic incoming service,so there is plenty of speed and bandwith available to handle these componets.

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Routers / Switches :: Add Wired Ports Via A Second Router?

Mar 21, 2011

uplink port is already being used for a wireless dlink router.....want to add wired ports via a second router

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Cisco LAN :: SA 500 - DMZ Over Single Uplink And Switches

Feb 7, 2013

I have an SA 500 with the optional port configured as the DMZ. The LAN ports are running the 192 range and the DMZ is the 172 range.
 
I have seperate offices (A few hundred feet apart) that have been connected  with 2 un managed switches up linked with a single wire. The 192 range stuff runs over this. I need to get the DMZ out to the second room and was asking about how to do this over the single up link and switches. (Trying not to run a second wire)
 
My lack of understanding had me draw up this diagram attached as a picture, to ask about. What it shows is me trying to get the DMZ through the up linked switches to the other room. I thought of using 2 routers, one on each end. I've been told this is incorrect and wont work.
 
Maybe a purchase of a second hardware and eliminate the switches? (up link the SA 500 to another device?) What should that device be?   

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Routers / Switches :: Add Wired Ports To DSL Modem And Get Gigabit SubLAN

Jan 24, 2012

Adding ports to my Fairpoint provided Westell 7500 Rev D DLS modem router which has only 4 RJ45 ports. Bought a Linksys SE2500 gigabit smart switch but it doesn't assign IP or pass on router assigned IPs. Can't get ASSISTANCE from Fairpoint [successor to Verizon] configuring router or any advice on other ways to get more wired devices on LAN.For speed in backups I'd like 3 devices to be able to communicate at giabit speed Want to have an NAS and 2 Win7 Ultimate computers on smart switch, 3 other wired devices [WinXP, AT&T Cell tower, & DirectTV whole house SWM interface] and wireless on the router. 1. Are Fairpoint specs for DSL published so I could get another DSL modem router instead of the Westell or is it better to configure Westell as a router only and use a new to be acquired router with or without the existing or a new gigabit switch. I have a DI-624 from the pre-DSL Hughesnet satellite days.2. Are there less smart switches which would work better and let router assign the IPs?3. If this is too complex for me, can you recommend a remote access consultant to walk me through this for a fee?4. I'm 82, have been in computing since 1960, mainly in on-line end user environment mbut don't know the bridging, PPP PPoE differences, and implementation or configuration details of current hard and software except as a user.

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Routers / Switches :: Thomson Speed Touch Not Forwarding Ports?

Oct 20, 2011

Ok, so i never had problems with this before until i reformatted my computer. I have used a program called simple port forwarding and i've also manually added the port seeing if theres a difference, but every time i check my port which is 25565 for a minecraft server it says either failed or not open etc.. I checked netstat -an and it showed it was listening to my ip address and port 25565.

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Routers / Switches :: How To Turn Off Ports For Torrenting On Qwest Pk5000 Modem

Oct 7, 2011

Ok, my roomate is hogging the bandwidth on our shared router downloading junk. I'm not sure if he's using a torrent, but just in case he is here is my question:How do I turn off the ports for torrenting on my qwest pk5000 modem? Is there anything else I can do that would work as well?My friend reccommended I turn off every port after 9000 or something.

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Cisco Switching/Routing :: 3750 Stackable Switches Uplink

Nov 14, 2011

If I have two stackable switches one that connects to the 6509 core switch and the other switch does not, do I have to uplink the switch to the other switch so that switch has route to the core switch or because the switches are daisy chain there is not need to cable one switch to to the other switch connected to core switch?

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Cisco Switches :: SG500-28P Slow Switch Uplink Connectivity

Feb 26, 2013

At our office we have a weird performance problem with the following switches and connectivity:
 
Internet     |
SG300-24 (L3) core switch     (in our server room)
|SG300-10P (L2) access swtich     (in our meeting room)     |
SG500-28P (L3) switch     (in our meeting room)
 
We are building a new computer infrastructure that is connected to the the SG500-28P. As you can see above the SG500-28P in our meeting room has an uplink to the SG300-10P in the same meeting room. And again the SG300-10P has and uplink to the SG300-24 in our server room. From the server room, there is connectivity to internet. The network uses a multiple VLAN's and routeing between them. Bootom line is, the internet VLAN ID 10 is tagged to trunk ports and available on the SG500-28P. So client get connected straight into the internet based VLAN.
 
The performance on the SG500-28P switch itself from VLAN to VLAN is very fast. But... the uplink connection tot the internet and other VLAN's on the core switch are very and very slow! At least 10 times slower than normal. So if I plug a laptop in the SG500-28P and go from uplink to uplink, it is slow! But... when I connect the same laptop to the SG300-10P the connection with only one uplink it is fast. As if three switches is to much. I can't figure out why.

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Cisco Switching/Routing :: 3750 - Fiber Uplink Between Switches

Nov 3, 2011

I have three switches:
 
primary - Cisco Catalyst 3750G-24TS-24
and two SG300-28
 
I need to apply uplinks as follows:
 
3750G-24TS-24 SFP (1) -> SG300-28 (first) mini-GBIC (1)3750G-24TS-24 SFP (2) -> SG300-28 (second) mini-GBIC (1)SG300-28 (first) mini-GBIC (2) -> SG300-28 (second) mini-GBIC (2) 
 
I would like to know, What type of mini-GBIC and SFP and cable I should use for SX Multimode?What max speed rate I will get?  

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Cisco Switches :: SG100-24 MiniGBIC Uplink Port Doesn't Work

Aug 22, 2011

I've just purchased 2 switches SG100-24 and use fiber cable to connect these switch together. I plugged cable in module MGBSX1 and then put it into miniGBIC uplink port but despite trying many times, also rebooted devices, I still not make these uplink ports up. how can I bring them up?

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Cisco Switching/Routing :: 3750X Switches Dropping Packets On Uplink Interface?

May 9, 2013

We have a remote site that is using 3750X switches as layer 2 switches back to our home site.  The uplink port is showing dropped packets but the utilization on the link is never about 10%.  We have a 100Mb circuit to this site.  Our speed tests and iperf tests are not showing any issues that we can see.  However the port is still droping packets.  It is not dropping at a high rate but they are dropping.          
  
switch#sh platform port-asic stats drop gi1/1/4
  Interface Gi1/1/4 TxQueue Drop Statistics    Queue 0      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 1      Weight 0 Frames 52876      Weight 1 Frames 2      Weight 2 Frames 0    Queue 2      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 3      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 1330874    Queue 4      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 5      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 6      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 7      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0switch#
         
Is there a way to capture these dropped packets to see what they are?  We do have VOIP phones at the site and are using Qos.

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Cisco Switches :: SGE2010 Can Use 4 SFP Ports And Stack Of Two Switches At Same Time

Feb 15, 2012

I looking to buy SGE 2010 swith, but I have some question:

1. Can I use 4 SFP ports and stack of two switches at the same time.
2. Is it possible to use for stacking  ports other than 24, 48?
3. What is maximum possible number of ports  to use for stacking (can I get more than 1Gb thruput).

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Cisco Switches :: SG300-28 Uplink To Another SG300-28?

Feb 8, 2012

Can I connect a single Cat5e cable between two SG300-28 and link them?  If so what must I configure?

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Cisco WAN :: 3560 - Configure L3 To Support ISCSi Traffic

Nov 14, 2011

I would like to properly configure my L3 to support iSCSi traffic. My L3 acts as an internal router between 4 different sub nets.
 
I have a iSCSi SAN on my network. A Windows server has Microsoft iSCSi initiators connecting to the SAN.

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Synology DS1511 NAS / ISCSI Initiator Crashing Server 2008?

Aug 16, 2011

I have a Server 2008 server and a Synology DS1511+ Nas.The goal is to make an iSCSI connection from the Synology to the Server 2008 server. However, I am having an issue. I set this all up two weeks ago. For two weeks it was all running fine. Now, my iSCSI drive is dropping daily. And everytime I go into the iSCSI initiator and click anything, the server still allows me to do some things, but it basically locks up. I can't restart, services stop responding, etc... The only was I can break it out of that is a hard reset. Why iSCSI initiator keeps taking down my entire server to the point of hard restart? Once this is solved, I bet the iSCSI dropping daily will be solved as well. I have already talked with Synology, the log is producing nothing and they are suspicious that it has been running fine the past two weeks. Windows update is off (I manually do it during scheduled maintenance), and there is no av or firewall running, so rule those out.

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Cisco Switching/Routing :: Configure 3560X Switch For ISCSI Connectivity

Mar 19, 2012

I haven't worked with infrastructure much lately but planning on replacing a Dell switch used for a small iSCSI SAN with a Cisco 3560x. Switch is sstorage ONLY, network handled through different switches. I believe I want to disable spanning tree and configure trunking for the 4 GB ports connected to the storage array. The switch is providing connectivity to SAN via multiple GB connections and then also multiple GB connections to 3 Vmware hosts.Can you look over the changes I made to config below and let me know if I am on the right track.
 
I also plan to add a second switch later with the 10GB modules to interconnect for redundancy (but not worried about that part for now). I do not plan on using jumbo frames.
 
Here are my questions

1) Is the best way to globally disable spanning tree for the switch?

2) Did I trunk the ports correctly below?

3) Should I apply any specific SmartRoles to the 4 SAN NICs (GE1-4) or to host NICs (GE13-20)?

4) Anything additional I should do to handle iSCSI data? 
  
Here is a copy of the config so far with my changes marked in RED.

storage1#wr tBuilding configuration...
Current configuration : 1696 bytes!version 12.2no service padservice timestamps debug datetime msecservice timestamps log datetime msecno service password-

[Code].....

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Cisco Switching/Routing :: Configuring Production 6509 For ISCSI Storage And VMware

Mar 11, 2012

I've been searching the forums to see if any other users have completed this type of configuration successfully with not much luck.  I have a Cat 6509 currently in production.  We have several Vlans and all communication and routing is funtional in our environment.  We are going to be adding an iSCSI Storage environment, and within a couple of months, adding a 3 Host VMware farm.  I've configured several iSCSI environments using dedicated switches for the iSCSI network but never to existing production switches.My thoughts are to add two iSCSI Vlans outside of the production IP Scheme to the 6509 with no SVI, attach storage controller's NICS ports to the management network and of course, other available NIC ports to the iSCSI network.  My question is, what is the best practice in configuring the 6509 i.e. switchports, Jumbo Frames, Flow-Control to support iSCSI on a 6509 that is in production and what are possible risks if any with enabling Jumbo Frames, Flow-Control etc?

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Cisco Switching/Routing :: C3750X Stack / Difference Between LanBase And IPBase For ISCSI?

Dec 26, 2011

Cisco let us try a CISCO C3750X- 24T-S  Stack (2 switches)  ->> IpBase Sofware licence We've 2 Hyper-v 2008 R2 and one SAN Netapp FAS2040 connected via Iscsi.All was working well with this stacks.Hyper-V see Nas Iscsi interface without problem. Even with basic stack config (no Vlan, ect...).Then, after this test period, we bought a C3750X-24T-L stack (2 switches) to replace the stack lent by Cisco.This one is LanBase Software.
 
With this stack, hyper-v work very bad ! We've got a lot of Iscsi error in the eventvwr.I can't access luns.So, is there a difference between LanBase and IpBase for a iscsi use ?I put the 24T-S config on the 24T-L switch without pb. So config is the same on both stacks...Also i've got a "TestPortAsicLoopback" = "Failed" on the new stack...I've tried with other stack cables. Not better.

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Cisco Switches :: SG 300-10 IPs On Ports?

Apr 8, 2013

i am deploying some SG 300's to some remote sites and will have static IP's assigned to them.  the elements that will be plugged into the SG 300's ports will be DHCP.  Is there a way to find out what IP's are assigned by port? Either by the Web GUI, the console, a log, etc?

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Cisco Switches :: SG200-50P Log / Ports Up And Down

Feb 19, 2013

My SG20-50P Switch Log appears as follows with Random ports going up and down.  I am trying to find out if this links to another problem I'm having with a Client Server software locking up on the client end.  The hardware, thin clients and desktops, are working and have checked all sleep and power settings.  All items in working order, now I'm wondering about the switch
 
Code...

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