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BNA 12.4.2 does not link some switches

  • 1.  BNA 12.4.2 does not link some switches

    Posted 01-13-2016 07:44 AM
      |   view attached

    Hey Guys, 

     

    I'm running Brocade Network Advisor 12.4.2 with about 150 switches topology. I have about 20 some switches, also Brocade that do not physically link to it's neighbor. I checked fdp neighbor and it clearly shows discovery of the next hop or core switch, but the diagram will not link that switch to the next.

     

    Any advise is appreciated.

     

    Thanks.

     

     


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  • 2.  Re: BNA 12.4.2 does not link some switches

    Posted 01-13-2016 10:02 AM

    Is the BNA in the same Subnet ? from the attachment show as you have different IP Class.


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  • 3.  Re: BNA 12.4.2 does not link some switches

    Posted 01-13-2016 10:22 AM

    Yes, BNA is in the same subnet; and we do use class B and class C IP's. 


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  • 4.  Re: BNA 12.4.2 does not link some switches

    Posted 01-13-2016 10:57 AM

    somethings are wrong.

     

    if you use different IP Class, is the question are the switch in the same Fabric ?

     

    if no, is probable the unmanageable swicht in a different Fabric is not set as seed switch.

     

    what kind of License is the BNA ? Professional Plus or Enterprise ?

     

    If you have a Enterprise and set during the Installation for "Medium Fabric" this option ca discovery +/- 100 Switches.

     

    I would suggest to set to Large


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  • 5.  Re: BNA 12.4.2 does not link some switches

    Posted 01-13-2016 11:45 AM

    Agreed; the switches are in the same fabric. Some of them have a single VLAN. 

     

    Here is even a better twist; I have two switches, same subnet, same model, same VLAN, both managed with ip addresses, both have the identical config, one mapped the other one not. The only difference between two, the older firmeware switch actually maps to the core, the newer one with 07.0.01cT7e1 does not.

     

    BNA licensing is Enterprise; 250 notes + SAN. 

     

    I wasn't the original installer; how would I change the Fabric discovery to Large?


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  • 6.  Re: BNA 12.4.2 does not link some switches

    Posted 01-13-2016 03:32 PM

    @vladministrator wrote:

     

    I wasn't the original installer; how would I change the Fabric discovery to Large?


    Go Server -> Options -> Memory Allocation.

    Change the size. 

    Click OK.

     

    BNA will need to be restarted for changes to take effect. 


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  • 7.  Re: BNA 12.4.2 does not link some switches

    Posted 01-14-2016 06:54 AM

    Thanks for the info; but no dice. changed to large and rebooted server. Ran re-discover and no luck.


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  • 8.  Re: BNA 12.4.2 does not link some switches

    Posted 01-20-2016 11:16 AM

    Hey Guys, does anyone else have any suggestions? I'll take any ideas.

     

    Thanks


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  • 9.  Re: BNA 12.4.2 does not link some switches

    Posted 01-20-2016 07:08 PM

    Looks like there's a few things getting mixed up in some of the above notes. So let's confirm a few details:

     

    * Is this just Ethernet switches that we're talking about, not SAN?

    * If so, what models + firmware versions?

    * Have you checked on the switches themselves that they see their LLDP / CDP / FDP neighbors?

    * Are there any devices in your network that are *not* discovered by BNA?

    * Are all devices fully discovered? (e.g. SNMP is fully working)

     

    There's also some confusion above about different Class addresses. A diagram might help here?

     

    It may be best to focus on one specific link that is not showing up. 


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  • 10.  Re: BNA 12.4.2 does not link some switches

    Posted 01-21-2016 06:43 AM
      |   view attached

    Thanks Lindsay;

     

    - We only talking about L2 switches

    - Model include: (there are other switches, all varies in version and model; these are just some examples)

       * ICX6450-48 POE Version 08.0.20T311

       * FastIron WS 648 G-48, Version 07.0.01cT7

       * FCX648G, Version 07.0.01T7f5

       * FastIron 648G-48, Version 05.0.00T7e5

    - Switches have CDP and FDP running. All can see the next hop neighbor or even a core connection.

    - All Layer 2 and 3 devices are discovered. A few hubs, we don't care about.

    - SNMP is working good. I can pull a full backup with BNA and push commands to it via BNA as well; no issues here. Aditionally, sflow also enabled on each interface and globaly. 

     

    Most of the addresses are all in 172.16.0.0 /16 range. There are a few VLAN's in 192.168.18.0/24 

    I'm attaching a small pic or the above examples.

     

    I appreciate the help.


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  • 11.  Re: BNA 12.4.2 does not link some switches

    Posted 01-21-2016 06:46 PM

    @vladministrator wrote:

    Thanks Lindsay;

     

    - We only talking about L2 switches

    - Model include: (there are other switches, all varies in version and model; these are just some examples)

       * ICX6450-48 POE Version 08.0.20T311

       * FastIron WS 648 G-48, Version 07.0.01cT7

       * FCX648G, Version 07.0.01T7f5

       * FastIron 648G-48, Version 05.0.00T7e5

    - Switches have CDP and FDP running. All can see the next hop neighbor or even a core connection.

    - All Layer 2 and 3 devices are discovered. A few hubs, we don't care about.

    - SNMP is working good. I can pull a full backup with BNA and push commands to it via BNA as well; no issues here. Aditionally, sflow also enabled on each interface and globaly. 

     

    Most of the addresses are all in 172.16.0.0 /16 range. There are a few VLAN's in 192.168.18.0/24 

    I'm attaching a small pic or the above examples.

     

    I appreciate the help.


    Couple of things:

    * These hubs, do any of them interconnect L2/L3 devices? Or are they only at the end of the chain? i.e. one uplink to a proper switch, with only desktops plugged into the rest of the ports.

    * Focus on a single device like 172.16.1.111. If you login to that device, what CDP/LLDP/FDP neighbors does it report? Login to those neighboring devices. Run the same commands. Do the two devices match up? 


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  • 12.  Re: BNA 12.4.2 does not link some switches

    Posted 01-22-2016 06:45 AM
      |   view attached

    * The hubs are just end point devices; users trying to connect a laptop and PC, per say.

    * 172.16.1.111 sees FDP neighbor -- 172.16.1.113 which also sees 172.16.1.111. Devices match up.

     

    I when little further and traced the FDP descovery and compared it to the BNA link. (see attached .jpg)

     

    So, the .111 discovers and also discoverable by .113

    the .113 disovers and also discoveragle by .118

    the .118 disocvers and also discoverable by .113

    the  .118 links to the core, as you see in the picture. but above devices do not inner connect.

     

     

     

     

     

     


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  • 13.  Re: BNA 12.4.2 does not link some switches

    Posted 01-24-2016 04:12 PM

    I wonder if there's something going on with the inter-play between the different switch/OS families, including what looks like some fairly ancient code versions? Topology discovery will probably work with those code versions, but they don't test the older versions - e.g. BNA 12.4.2 is tested with FES 4.1 code trains. 

     

    For the other situations where you have missing links, are they all chains of the same device, or are they mixed groups like the 111/113/118 one described above?


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  • 14.  Re: BNA 12.4.2 does not link some switches

    Posted 01-25-2016 06:43 AM

    Starting to sound like a ticket with Brocade. This is indeed a strange situation, especially when so many different codes and firmware.

     

    The example I've provided is just a situational layout that happens to be chained. The other switches, like a single one connecting directly to the core, does not link either. The switch firmware is 08.0.20bT311, and it's also discoverable by both ends. 

     

    I'm kind of stuck at this point. Many points point to many different things. Might have to break it down in an individual instance. Unless, any other options are out there that I don't see.


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  • 15.  Re: BNA 12.4.2 does not link some switches

    Posted 01-25-2016 09:42 AM
    Yes, a ticket is probably best. They can go through the support save data. They will probably want some of those older firmware versions upgraded, but you can get them to focus on connections between devices running supported versions.
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