PortFast to non manageable switch

Hi Experts,

Recently, I found that, in one of the switches in our environment, portfast enabled an interface which is connected to a switch that is not manageable.

But the 3 servers are conencted to these not manageable switches.

Since this switch is connected to the servers only, there will be no problem, right?

Thank you

Vipin

Jon, Vipin.

Jon is of course right about the fact that the PortFast to another switch shouldn't be allowed.

I see two aspects to this: firstly, whether it will work properly in your network exactly as-is, and second, how he responds to several what-if scenarios.

In your current network to the specific State, it is now, with this switch has a single connection to the switch managed upstream, and have a number of links not forming a loop to devices not running Layer2 transition/bridging between them, using the PortFast does create any problems.

If we start thinking about scenarios of what if (what happens if another uplink is connected to the switch upstream, what happens if someone connects to a cable and deliberately or inadvertently creates a physical loop, what happens if the servers are interconnected and configured with a sort of transition), certainly, the PortFast is absolutely inappropriate because it will allow at least transient loops happen switching , and it is not clear if managed switches will have enough CPU power to recover the loop after it starts flooding images anywhere in the network.

So I would personally put it this way: it is not a recommended scenario, and it is not a best practice approach. And then, in a tightly controlled environment, it's like any other powerful tool which can either help things work better, or will come haunts you return if used inappropriately. It is up to you to decide if the benefits outweigh the risks. In any case, having a single switch is a risk enough.

It reminds me strongly of how heard us strongly on my programming course, do not to use the GOTO command. Of course, it allows all kinds of bad things to do. However, there are certain situations where a judicious use of GOTO command simplifies the complexity of code resulting and memory footprint. You can find the used enough GOTO statement often in the code of the Linux kernel, for example - and surely, kernel Linux coders are no lamers in C programming. It's just to know exactly what benefits, disadvantages and risks it involves to use such powerful mechanism. The PortFast to a single switch is, in my opinion, a similar story.

Best regards

Peter

Tags: Cisco Network

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    Hentzien

    Virtual Admin

  • Configurazione san

    Hello to all,

    I like to start a my configurare he mio ambiente virtuale ho some dubbio da clarify, per I quali non trovo risposta sui vari manuali.

    Ambiente e composto da 3 host substitutes, 1 iscsi san HP P4000 (1 coppia di cluster storage), 2 switch HP procurve its alla san, 1 qnap by backup it.

    Dubbio 1: stare of the san sta in una rete is dedicated, how separata dalla lan azienda, my deve anche su una class di separata sulla stessa o IP class di IP? IO pensavo di separarle, nel senso che lan business e configurata come 192.168.1.x mentre san sara 192.168.2.x, my mi è venuto he dubbio nella configurazione del management group della san mi viene required pole address del server di posta per per dei messaggi di attention, e questo, ovviamente sta nell'altra rete, e ROMA non avere accesso al gateway theory an internet is the separo dalla dalla san lan , quindi come fa a mandarmi mail?

    Dubbio 2: sono a po' sull'architettura della san confuso. Each 2 nodi P4000 ha due dei is iSCSI, che mettere I like team per aumentare Velocità e tolerance AI guasti, my 2910al di HP non fanno switch switch port trunking due tra gli. Devo quindi collegare due door del nodo 1 Hello pass 1 to the door del nodo 2 Hello switch 2 per poter abilitare sugli switch it trunking, oppure connect per ogni nodo una porta per switch e faccio it grouping delle door solo sugli storage?

    By ora mi fermo who took the request delle ora banalità my of cominciando sto.

    Grazie

    "parlando Stai con me? (case No.)

    Comunque, the iscsi rete con indirizzamento e più che altro una questioned "igienica" FAT32: e vero che sono separated, reti my nel caso uno prima o poi mistakes a rete connettere UN apparato di, scatenare Source ip e dare drowning Hello storage e an attimo. Oltre al fatto che più e easy al volo di rete quale other if sta guardando parlando IP.

    The configurazione, mainly invito a studiarsi he documento di integrazione ufficiale running VMware vSphere 4 HP LeftHand P4000 SAN Solutions, e relativo an ESX 4 my will benissimo anche by 5. Leggi inoltre HP StorageWorks P4000 SAN Solution user guide.

    Dai documenti, secondo he specie, already varies configurazioni by rates collage anche senza fine it cross-stack etherchannel (ovvero i fare aggregando trunk door places switch differneti, my trovi questa fruit sui procurve a partire dai 5000 year chassis, roba da ricchi...).

    Fondamentalmente, having had to pass, you can due cose fare:

    -Adaptive Load Balancing, set the nic due not line any switch sugli configurazione e active/passive

    -Link Aggregation dynamic Mode, set the nic in active/active my queste must be mass obviously knew a single switch to non hai he cross-stack, quindi non previene break dello

    In realtà, per come funziona he P4000, sarai m'immagino con due nodi networked Raid 1 e quindi it failover lo fai tra I due nodi. Failover Manager he serve solo by manage, quorum it, dato che una struttura P4000 deve sempre work number dispari di sistemi con.

    Ciao,.

    Luca.

  • When you print a book in PDF, bookmark definitions are not saved

    I remember seeing another post on this subject and I can't find it now, but none of the solutions mentioned he worked for me, so this is:

    I'm working on a migrated book of FM 9 to 11 of the FM, and when I print to PDF, I specify bookmarks I want to display in the tab favourites of the dialog Configuration of PDF for the selected files . The PDF file prints fine, but when I want to print the book once again, FM does not remember my settings, forcing me to set bookmarks from scratch every time. This has proved quite painful because I'm working with an old book in which the styles are not intiutive, so try to remember all of them each time is not the best of pleasure. When I print a single file in the book, the settings are saved correctly.

    In the previous post, I remember reading that it was a bug in FM and try the following suggested solutions (of which none worked): switch mode structured; Save the position desired in a single file in the book, printing the document and then print the book (had to train FM Recalling settings for the whole book); except the right to book after it prints; Select all the files in the book and record in PDF format, as opposed to the selection of the book, and then file > Save as PDF.

    I would be happy to know if anyone has any ideas or if Adobe is planning to release a patch for this problem.

    It is my understanding that FrameMaker uses the setting stored in the first document in the book when creating a PDF of a book. Then, open the first file in the book and make a PDF, defining your bookmarks you want for the whole book. Then, create the PDF of the book. Check the settings before clicking Print to make sure that they are what you want. You may need to make some changes, but to remember them the next time.

    I work with FM 9, so this may not be relevant for FM11. I felt it necessary to open the PDF Setup dialog box every time I make a PDF of a book and click on save/OK/whatever, to make sure that the bookmarks are created correctly. The settings are still correct, no change is necessary; but I think it is necessary to open the dialog box and close it to get updated bookmarks indented correctly in the PDF file. It may have been fixed in FM11.

    Van

  • Ho fatto non trovo più pasticci he mio number di series by willing e switch Creative Cloud, come posso fare?

    Ho fatto non trovo più pasticci he mio number di series by willing e switch Creative Cloud, come posso fare?

    !

    creating cloud does not have a serial number.  It uses your adobe id.

    Download the creative cloud desktop application (after signing with your adobe ID), apps download Adobe Creative Cloud | CC free trial Adobe

    and use the desktop application to install your adobe creative programs of cloud.

    If you already have the cc desktop application and you will need to update your adobe id, connect, disconnect | Creative desktop application Cloud

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