Re: Cisco-HP ?

Also, I would thought that "splitting your VLAN's across your cores",
i.e., not having a common VLAN shared between them, would help in
maintaining separate domains of failure.

-Carlos

Jon Hartman @ 10/10/2014 19:00 -0300 dixit:
> Agreed, as the aforementioned BPDU filter and HP's default of no STP are
> responsible for most of the bridging loops I've seen. The only exception
> would be a freak hardware failure of a line-card, exacerbated by using trunk
> mode "on" instead of "desirable."
>
> That said, unless serialization delay is a major concern for you, I'd
> recommend *not* splitting your VLAN's across your cores. It only serves to
> unnecessarily complicate your topology.
>
> -Jon
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Jeremy Garver
> Sent: Thursday, October 02, 2014 9:37 PM
> Cc: ccielab_at_groupstudy.com
> Subject: Re: Cisco-HP ?
>
> I had this problem quite a few years back. I was stumped at first because it
> was most likely a bridging loop, but I was confused at the source since I
> thought I had all the switches accounted for and STP was enabled. I found it
> because the server guys decided to use the outage to perform maintenance on
> the Blade Chassis. As soon as they shut it down; everything went back to
> normal on my core.
>
> At the time I didn't know that much about spanning-tree, so I just turned on
> spanning-tree on the HP as I found out at that time that HP Procurves do not
> have STP enabled by default.
>
> I never had the problem again and I have never been back into an HP chassis
> switch. Plenty of other HP Procurves, though. The newer H3C switches by HP
> do come with STP enabled by default at least, but they are still a pain.
>
> If I had it to do now; I would handle it the same way Marc suggested and
> enable MST everywhere and make sure that your cores are root; dividing the
> VLANs accordingly across the cores (one core handling root for half the
> VLANs and the other core handling root for the other half). That is,
> assuming that you have dual cores. Everyone should, but not everyone can
> afford them; especially when using Ci$co.
>
> On Thu, Oct 2, 2014 at 8:38 PM, marc abel <marcabel_at_gmail.com> wrote:
>
>> Filtering BPDUs is likely to make the problem worse, not better.
>>
>> On Thu, Oct 2, 2014 at 7:35 PM, kapilatrish <kapilatrish_at_hotmail.com>
>> wrote:
>>
>>> If cisco says its a spanning tree issue can't you filter the bpdus
>>> on the port?
>>>
>>>
>>> Sent from Samsung Mobile
>>>
>>> -------- Original message --------
>>> From: Cisco Fanatic <ebay_products_at_hotmail.com>
>>> Date:02/10/2014 7:48 PM (GMT-05:00)
>>> To: ccielab_at_groupstudy.com
>>> Subject: Cisco-HP ?
>>>
>>> This is really getting to my nerves. I have a WS-C4500X-16SFP+
>>> switch connected to HP Blade and we already had 2 outages in the past
> week.
>>> HP is saying that they don't see an issue on their blades and Cisco
>>> TAC
>> is
>>> saying it's to do with HP blade which is running VMs that is causing
>>> spanning tree issues.
>>> Please I needs some insight into this from people who have worked on
>>> HP
>> and
>>> Cisco platform.
>>> Are there any know interoperability issues between Cisco and HP?
>>> Also, is there a best practice design which explain how to connect
>>> Cisco with HP Blade Servers?
>>> Yuri
>>>
>>>
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>>>
>>
>>
>> --
>> Marc Abel
>> CCIE #35470
>> (Routing and Switching)
>>
>>
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-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net