redundancy switch

Similar Questions

• Connect the redundant switch

  Hello

  I have several Dell 2724 switches that I would like to set up redundantly.

  I joined two 2724 s with a trunk. I would now like to connect the access switch with one connection to each of the two switches to shared resources. One cable in switch1 everything works. Put the second cable switch2 and all breaks loose.

  Option1 = Switch2 (LAG)

  \       /

  Switch3

  Can someone tell me if it works and how?

  Thank you

  This kind of configuration can operate with switches that offer spanning tree or MLAG. But the 27xx series switches do not offer these features. With this type of installation, there is a loop that will cause a continual broadcast storm that will wreak havoc on the network. Your best form of redundancy will link redundancy switch, but you will not be able to get the redundancy of switch with 27xx switches.

  Switch1 SWITCH2

  \\       //

  Switch3

  Or

  Option1 = Switch2

  //

  Switch3

  Or

  Option1 = Switch2

  \\

  Switch3

  See you soon

• issue of redundant switches ESX

  Hi guys,.

  Please help me to clarify this point.

  I enclose a simple diagram showing the configuration.

  Question: Do I need to connect the two switches in order to get the VM1 VM2 talk and vice versa and offer redundancy switch?

  Thank you!

  Hello

  Yes, I think that for your diagram and design, there is no redundancy.

  Imagine host2 loses the connection to switch1.

  If host1 sends all traffic through switch1, never land on two host. You bought two switches for redundancy haven't you?

  A server can detect when a directly connected path failed. For example, in the above situation, host2 will send everything to the switch2 he knows is online. But a server cannot fail 'upstream '.

• Help with redundant switches

  Can somone tell me if it is necessary to join two switches together during the definition of redundant paths and so why is this need to be?

  To give an example, I have a box of ESXi 3.5 with 2 uplinks were team together for iSCSI software storage. On this team, I have a cable going to a switch and another cable from another switch. My san also has the same configuration for the grouping.

  The switches must be connected togther and if so why?

  Thank you

  Tony

  Typical connecting two switches together aims to make them behave like a single large switch and increase redundancy.

  Charles nights, VCP

  If you have found this or other useful information, please consider awarding points to 'Correct' or 'useful '.

• the redundant switch configuration

  We have a site with two servers of ESX4.  Both servers have networking configured like this:

  

  vmnic0 is plugged into a switch and vmnic2 is connected to another switch.  However if the vmnic0 switch is plugged breaks down all closed virtual guest machines.  Any ideas what I am doing wrong?

  However if the vmnic0 switch is plugged breaks down all closed virtual guest machines.

  You have VMware HA?

  Set response of isolation 'leave the virtual machine' and check how much time is needed to move to the other switch.

  But tuning configuration of the switch (for example with RSTP), you can reduce this time.

  Then you can put this time (better if you double it) in HA advanced settings and re-enable the response of isolation.

  André

• Communication series with Miteq switching system

  Hello

  I am trying to contact a Miteq redundant switching system 1:8 for high power amplifier.

  My VI gives me an error of framing. I have already read the thread on the mistake of framing posted here and made sure my port is configured to match the settings of the device.

  (Data bits - 7; Parity - same, baud rate (9600) equipment is silent about data flow and the stop bits, (I guess NONE and 1.0 respectively)

  I use a laptop with a USB port. I have a USB-serial cable of NOR. I use an IC -? 855 RS232-RS485 converter because the system is RS485. I already checked the pinout for the port that I use a fact a connector corresponding Tx + in the converter with Rx +; TX - Rx-; and the other two wires are connected as well.

  I opened MAX and tried to write directly to the VISA driver, but I get an error as well.

  I do not know if the manual is just, he is a former switch and someone could have changed the port connections.

  Y at - it a trick to know what is the link?

  I'd appreciate any thoughts here

  Thank you very much

  Hi Jeff,

  I can't open the link you sent, but we finally thought that the problem is the connection of broaching. Me not according to the manual or any document we have.

  Sorry I did not before.

  Thank you very much for answering!

• What are the bare minimum commands to get a stack of PC6825 3 - switch with inter switch Link Aggregation?

  I am brand new to PowerConnect switches, even though I am familiar with the concepts of VLANS, aggregation of links and spanning tree.

  I am on a deadline to get some new ones installed 6248 in our baskets and get them functioning as a stack. What are the bare minimum commands for:

  • Three switches in a stack (master/Eve/member)
  • 2 ports grouped between each (total redundancy) switch with loops WITHOUT switching

  All the switches are running firmware v3.3.9.1 (January 2014).

  Thank you

  The range of interface Ethernet 1/g1-1 / g2 allows you to select the ports you want in the channel of the port. Page 293

  Channel-group 1 Auto mode to create 440 lacp lag page

  Select the Group of channels with interface port-channel 1

  Switchport page 601 in trunk mode

  Switchport trunk allowed vlan [VLAN you use]

  http://FTP.Dell.com/manuals/all-products/esuprt_ser_stor_net/esuprt_powerconnect/PowerConnect-6248_Reference%20Guide_en-us.PDF

• Redundant power supply

  Hello world

  I would like to know if the SG500-28 supports redundant power (means 2 power inputs)?

  Thank you.

  Not on those I have. For the price of a switch that is, you might be better with a redundant switch and using cross stack LACP connections to devices (depending on what they are).

  Interesting name incidentally - "odjdj uhdhudh".

• Connect with independent switches vSwitch

  Hi all

  I am a newbie in VMWare and really not had in networking. Need your suggestion kindly for our VM infrastructure plan.

  Here's what I have (or will have):

  I create a small cluser (2 ESX, each with 6 NIC host). There are 2 stacked Cisco 3750 and stacked 2 4524GT Nortel on our farm in GE switch. Up to now, we have 6 virtual machines, but we intend to put all the servers the VM infrastructure.

  That was my previous plan:

  I did some research in the documents of VMWare and BBS.  I plan to ESX hosts connected to Cisco units, their link to GE in 2 units of the evening. Configure NETWORK adapters, port channels, load balancing, etc...

  An incident has changed my mind. A month before our network, group support updated nortel switches firmware. It's a nightmare. The Nortels 2 were dead after the upgrade. Had to pass all connections to the server of Nortel to Cisco and roll after that the call of Nortel has been set.

  My question:

  So let's say that sometimes the stackable switches will be dead together. Yes, I can connect an ESX with Cisco and another with Nortel. When stacked Cisco or Nortel is dead, we have yet another host working with switches lived. But I can connect an ESX with Cisco and Nortel? It seems more stable, isn't she?

  For example, I intend to use the 4 NICs for production and other for SC and VMkernel network interface cards. The production of 4 network cards are rising in a vSwtich. Failover and load balancing works when I connect nic0 / nic1 with Cisco and nic2 / nic3 with Nortel?

  My recommendation:

  Configure NETWORK adapters, port channels, load balancing, etc...

  Forget it. No team, no port channel. Just configure the uplink as junction ports ports and set the VLAN on the virtual port groups. VMware ESX (i) (with standard vSwitches) performs Round Robin load balancing based on the original default virtual port code, which is sufficient in most cases. With dvSwitches, you also have an option to configure NIC database load. In both cases you can use ports on all physical switches without having to think about making active configurations / standby at all.

  On the beat of the heart. Usually, I connect the Service Console to a vSwitch with 2 physical uplinks, each on a different network card and everyone to another physical having redundancy switch. What I actually do is to put the Service Console and VMotion that vSwitch and configure groups of ports for active / standby to ensure that each of them uses a dedicated NETWORK adapter unless there is a network outage.

  You must also consider switching to (installable) ESXi as ESX will be greater in the future. If you do not need to install agents on hosts etc, the only change will be that you will not have a "Service Console" more. For communication and management, you will have a «VMKernel network management» instad

  André

• NICs for redundancy private interconnection

  Version of DB/grid: 11.2.0.2
  Platform: AIX 6.1
  
  We will install a RAC 2 nodes on AIX (that thing that is almost good as Solaris)
  
  Our primary private interconnection is

  ### Primary Private Interconnect
  169.21.204.1      scnuprd186-privt1.mvtrs.net  scnuprd186-privt1 
  169.21.204.4      scnuprd187-privt1.mvtrs.net  scnuprd187-privt1

  For redundancy of the inteconnect Cluster, Unix team has attached an additional NIC for each node with an additional Gigabit ethernet switch for these cards.
  
  
  
  

  ###Redundant Private Interconnect attached to the server
   
  169.21.204.2      scnuprd186-privt2.mvtrs.net  scnuprd186-privt2  # Node1's newly attached redundant NIC
  169.21.204.5      scnuprd187-privt2.mvtrs.net  scnuprd187-privt2  # Node2's newly attached redundant NIC

  Example borrowed from the post of citizen2
  
  
  Apparently, I have 2 ways to implement redundancy of cluster inteconnect
  
  Option1. NIC binding at the OS level
  Option2. Let the grid software to do
  
  Question1. What is the best: Option 1 or 2?
  
  Question2.
  With regard to option 2.
  Googling and OTN, I believe that, during the installation of the grid provide you just 169.21.204.0 to inteconnect to cluster and grid will identify the redundant NIC and switch. And if something goes wrong with the installation of primary interconnection (above), grid automatically réacheminera interswitching traffic using the redundant NIC configuration. Is this correct?
  
  
  Question 3.
  My colleague told me, to the redundant switch (Gigabit) unless I have set up some multicast (specific AIX), I might get errors during installation. He has not clearly what it was? Anyone in front of multicast related question on this?

  Hello

  My recommendation is you use the AIX EtherChannel.
  The EtherCannel of AIX is much more powerful and stable compared to HAIP.

  See how to configure AIX EtherChannel on 10 Gigabit Ethernet interfaces
  http://levipereira.WordPress.com/2011/01/26/setting-up-IBM-power-systems-10-Gigabit-Ethernet-ports-and-AIX-6-1-EtherChannel-for-Oracle-RAC-private-interconnectivity/

  If you choose to use HAIP I recommend to read this note and find all the notes on the bugs of HAIP on AIX.

  11 GR 2 Grid Infrastructure redundant Interconnect and ora.cluster_interconnect.haip [1210883.1 ID]

  ASM crashes as HAIP Does not failover when two or more private network fails [1323995.1 ID]

  On the multicast, read:
  Infrastructure 11.2.0.2 grid or upgrade installation may fail because of the requirement of multicast [1212703.1 ID]

  Kind regards
  Levi Pereira

• iSCSI switch recommendations

  I want to put in an Equallogic PS4000E.  Basically at the moment we are talking about a cost relatively low jump to the top of a 'silly' iSCSI array using SATA drives for a specific requirement for in bulk but low transaction storage.

  In a year or two is when our main SAN is replaced I would be interested to get a unit specified above Equallogic, use it as our primary box and moving our main on her production (we are almost entirely virtualized already) and setting the PS4000 at the other end of our site as a uni of replication/DR.

  For now, while it is clearly the best practice, I don't know if we really need of redundant switches, so what I'm looking for is recommendations on what might be an appropriate switch to buy now to purchase more from the same provider if normalize us on Equallogic.

  Dell PowerConnect are the obvious choice I guess.  We already have a couple of 5424 in a rack maintenance one "stupid" MD3000i to our Dr site, we are not pushing them, they seem to do the job, even if the web GUI sucks - I guess that they will be not enough should we end by using EqualLogic strongly?

  There seems to be a lot of vendors out there names I know, Dell, Cisco, HP, then are many sellers of "niche" - and I don't know what makes a good iSCSI switch.

  We're currently on ESX 3.5 U4 and I expect to move to vSphere when our main SAN and ESX boxes are replaced (basically right now, it is not broken, so I don't mean to fix).

  Yes, it's called the 'Dell_Equallogic_Configuration_Guide.pdf' which I'll try to join.  You want to watch 'Annex B' in there, you will see the exact steps that you want to make changes.  Just to make sure I could repeat the process if necessary, I took notes in construction, which basically represent the steps gives Dell.  Oh and make sure you save your new configuration.  .. .you wouldn't whatever it is embarrassing to occur.

  -

• Will be traffic?

  Hello

  In IPS4255 we mention once you set automatic Bypass traffic mode continually circulating from a software failure, it will be before the traffic of HW failure?

  With 2 JOINT-2s in a single chassis and then spanning tree can be used for failover.

  A JOINT-2 will be in a State of the expedition, and the second JOINT-2 will be Blocking.

  If the JOINT-2 to pass the State fails, then spanning tree will be the other JOINT-2 of blocking for transfer and start sending the traffif through this one.

  BE AWARE THAT, as this type of failover is what we call stateless. The second JOINT-2 will not have followed active TCP sessions. So when one breaks down and the other starts to see the traffic the second JOINT-2 will see TCP packets for existing sessions as being of the order of the State (no negotiation of 3 way view). It don't disagree that these connections and new TCP connections will be started.

  When you look at redundant switches, you add an extra level of complexity.

  You must first make sure that all traffic through one of the JOINT-2s. If you have assynchronous Routing then you might have the client packages through a single switch and is JOINT-2 and server responses through the second switch and it's JOINT-2. Each JOINT-2 would see only half of the connection and would deprive the packets because they could not follow both sides of the connection.

  If you get the problem of routing assynchronous prevented, the next number must ensure that if the JOINT-2 in the first 6500 fails, then the traffic will be sent to the second 6500. According to your switch Code configuration spanning tree may work for this, or you may need to use a routing as HSRP Protocol to do this.

  Be aware that this may depend on the ability of switches to use the port State JOINT-2 to decide whether to drop the switching/MSFC interface by using the function autostate. The function autostate has been set to deliberately ignore the JOINT-2 ports when they were promiscuous.

  We change the native IOS code to activate the function autostate when the JOINT-2 is online but I do not think that it has been delivered. I'm not sure what the State of the question is in the BONE of cat (hybrid).

  You should also know that it would be once more stateless failover for existing TCP sessions would be rejected and new connections TCP should be established.

• RV320 WAN & LAN limitations

  Hello

  I would get a few useful claryfication, (new to this dev).

  1 WAN interface: supported ports UNTAG mode only, but happening tags from/to other devices, intermediary?

  2 port LAN: is there a way to configure LAG or just clean up STP redundancy on two LAN ports that are connected to two separate Cisco switches (themselves configuration with an OFFSET?)  The same subnet or VLAN on both ports of eth rv320?

  I'm trying to get a redundancy/failover LAN ports wil b/c router can be used with redundant switches.

  Andrew

  Hello

  1 WAN interface supports UNTAG mode only. This means that packets from LAN to WAN will be natted as not tagged. Packets arriving on the WAN port should not be tagged, or get

  2. LAN ports - not LAG and STP support

  Kind regards

  Bismuth

• Design by using NetApp's best practices

  I am preparing for my VCP5 and I read the new book by Scott Lowe. the book describes how the traffic should be isolated. your vMotion, vmkernal, etc., but in many organizations, I see the NetApp with some of data warehouses and a few LUNS to CIFS share LUNS. I guess you can have your vmMotion on a VLAN separated, but would not safer just configure a windows VM file server to host your files? In freenas and openfiler forums, they stress is not to run their software in virtual machines in a production environment.   Physical separation would be better then just a VLAN? I was inking and correct me if I'm wrong. I think the CIFS shares in a virtual hosting machine would SAN, vMotion, vmkernal, most reliable if you have redundant switches on both sides VMware hosts. So if your kernel switches drop your vmware environment will not drop.

  > traffic must be isolated.

  Yes, the network traffic must be split on networks separated for various reasons, including performance and safety.

  > NetApps with MON a few for data warehouses and a few LUNS to CIFS share.

  Yes, if you have a NetApp file server you can block-level storage server as FCP or iSCSI, CIFS or NFS file-level storage.

  > I guess you can have your vmMotion on a VLAN separated, but would not safer just configure a windows VM file server to host your files?

  OK, you lost me.  Yes, you must separate the vMotion traffic to enhance the performance and because the vMotion traffic is not encrypted.

  I don't see where you're going for vMotion to a Windows file server?

  However, if you are referring to, why don't you your NetApp instead of Windows CIFS Server:

  You don't need to patch and reboot the NetApp at least once a month.

  Performance is better

  You don't need to buy a Windows license and then maintain Windows

  Snapshots.  NetApp has the best shots in the business.  When your Windows I/O high, or just typing box because it of Tuesday and removes all of your VSS snapshots you really wish you had a NetApp.

  > In the forums of freenas and openfiler, they stress is not to run their software in virtual machines in a production environment.

  Note that there are a ton of storage there equipment running as VMs and server NFS for shared storage, including left and they have been stable for years.

  > Physical separation would be better then just a VLAN?

  Yes, if you have the infrastructure.  When it comes to the first time I've seen reference you VLAN?  Are you talking about now the NetApp as the series 2020 with two network cards where you need to carry all traffic (managent, CIFS and iSCSI) through them via VLAN?

  Like this: http://sostechblog.com/2012/01/08/netapp-fas2xxx-fas3xxx-2-nic-ethernet-scheme/

  > I was inking and correct me if I'm wrong. I think the CIFS shares in a virtual hosting machine would SAN, vMotion, vmkernal, most reliable

  CIFS is nothting to do with SAN, vMotion or VMkernel.  CIFS (SMB) is the protocol used mainly by Windows file sharing

  > If you have redundant switches on both sides of the VMware hosts. So if your kernel switches drop your vmware environment will not drop.

  You always want to redundant switches.  No single point of failure is the best practice.

• Presentation of the NETWORK card

  Hello

  We have two servers (Dell R710s) esxi5 in a cluster.  We use all of the separate physical switches, no trunks / VLAN.  We have redundant switches for all networks.

  Today, we have a management interface (management and vmotion), two interfaces iscsi (for redundancy of our SAN access path) and a network of virtual machine interface.  We don't do a lot of vmotion, maybe once a week.  Not DRS, HA or FT today (although we are allowed for all of it).

  We have a total of 6 available physical interfaces.  What is the best way to improve our design?  I know that we could separate management and vmotion?  Or we could go with two interfaces of management/vmotion.  We should also work to our virtual machine network interfaces.

  I think 'ideal' would be the two management two vmotion, two iscsi, two VM networks.  But this would require the purchase of another NIC if that is strongly recommended I consider that.  But if not, what is the best improvement we could make?

  Thank you

  Shane

  Hi Shane,

  For the modest sum of an extra NIC, I highly recommend splitting all services for full redundancy. Although this is not a for your primary needs, an easy win for double your speed of vMotion is to add a second VMKernel port (requires an additional IP address) to the vSwitch and reverse your card order of failover for each port group. So, in this case, your vSwitch using two uplinks (example: vmnic2, vmnic3) in an active/active configuration, and each port group replaces the switch to use a strategy of active failover / standby. Your first VMKernel port uses as active vmnic2 and vmnic3 as before, and the second uses vmnic3 as active and vmnic2 as before (effectively using the two links actively and ensure redundancy).

  I currently do the following (each service on a separate vSwitch);

  • Management (2 x 1 GB links - active / standby - access ports)
  • vMotion (2 x 1 GB links - active/active with 2 x VMKernel port as described above - access ports)
  • IP_Storage (2 x 1 GB links - active / standby - access ports)
  • Comments of networking (2 x 1 GB ports with tagging VLAN links active/active - junction)

  Each uplink is patched in a separate physical switch for redundancy.

  If you are licensing to the HA, DRS, etc. I would also like to use these features to your advantage

  See you soon,.

  Jon