[c-nsp] NX-OS - Fabric Path

Tassos Chatzithomaoglou achatz at forthnet.gr
Mon Jul 26 15:22:04 EDT 2010


I checked 2 new N5k and they were configured on Apr 17th and May 11th 
(according to the logs) with ip 10.1.1.x/24.
What is even more strange is that i found commands configuring ethernet 
interfaces not belonging to this n5k.
Probably someone connected an extension ?

--
Tassos

Lincoln Dale wrote on 26/07/2010 03:41:
> seems like manufacturing may have skipped a "write erase" step.
>
> i'll pass the clue bat along.
>
>
> cheers,
>
> lincoln.
>
>
> On 26/07/2010, at 1:55 AM, Church, Charles wrote:
>
>    
>> Hmmm.  When I looked at the 'show accounting log' on one of mine, I did see
>> a couple other 10.1.1.x addresses other than the .50 when mine arrived.  I
>> didn't capture it, but they did have early dates which I believe were before
>> we received them.  Does seem like some test addresses.  I have the same
>> 10.1.1.1 VRF 0/0 route as well.
>>
>> Chuck
>>
>>
>> -----Original Message-----
>> From: Charles Spurgeon [mailto:c.spurgeon at mail.utexas.edu]
>> Sent: Saturday, July 24, 2010 6:57 PM
>> To: Church, Charles
>> Cc: Manu Chao; Peter Rathlev; Lincoln Dale; cisco-nsp at puck.nether.net
>> Subject: Re: [c-nsp] NX-OS - Fabric Path
>>
>>
>> Thanks for posting this. I am seeing the same thing and since I know
>> that I am the only person with access to the switches I was wondering
>> where those addrs had come from. I am building the lab config and no
>> one else knows which console TS lines I was using or which ints.
>>
>> I have two new 5020s running 4.2(1)N1(1) that were unboxed a week and
>> a half ago and set up in the lab area.  I got a chance to work on them
>> today and when looking at the config one of them had mgmt0 configured
>> with 10.1.1.61 and the other had mgmt0 configured with 10.1.1.63. Both
>> of them had the management vrf default route pointed to 10.1.1.1.
>>
>> I am the only person working on these switches and I bypassed the
>> setup config when they were powered up. I did NOT configure them with
>> these addrs. Nor were they connected to any live network that had
>> access to any DHCP server. I have no idea where they got this
>> config. Probably a leftover from mfg testing?
>>
>> Their mgmt0 ints were not connected to the same VLAN and I didn't see
>> an ARP storm.
>>
>> -Charles
>>
>> Charles E. Spurgeon / UTnet
>> UT Austin ITS / Networking
>> c.spurgeon at its.utexas.edu / 512.475.9265
>>
>> On Mon, Jul 19, 2010 at 10:35:56PM -0400, Church, Charles wrote:
>>      
>>> Just be careful about connecting the mgmt0 interfaces to anything prior to
>>> configuring them.  The default IP address of 10.1.1.50 on them (at least
>>>        
>> on
>>      
>>> the 4.2 5000s) will cause a spectacular ARP storm when they conflict with
>>> each other, like when you attach several unconfigured ones to the same
>>> network.  Several thousand PPS, eventual reloads, etc.  Our installation
>>> guys got ahead of the config guys in our new DC, nice little mess it made.
>>> Not sure why they put a default address on them, hope it's something they
>>> correct in the future.
>>>
>>> Chuck
>>>
>>> -----Original Message-----
>>> From: cisco-nsp-bounces at puck.nether.net
>>> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Manu Chao
>>> Sent: Monday, July 19, 2010 7:17 PM
>>> To: Peter Rathlev
>>> Cc: Lincoln Dale; cisco-nsp at puck.nether.net
>>> Subject: Re: [c-nsp] NX-OS - Fabric Path
>>>
>>>
>>> Yes, but Nexus hardware is the right platform if you don't want to loose
>>>        
>> any
>>      
>>> packet in your DC ;)
>>>
>>> On Tue, Jul 20, 2010 at 12:56 AM, Peter Rathlev<peter at rathlev.dk>  wrote:
>>>
>>>        
>>>> On Tue, 2010-07-20 at 08:29 +1000, Lincoln Dale wrote:
>>>>          
>>>>> right now the hardware is using a frame format that is not that of
>>>>> what TRILL uses (and as such we're using a Cisco-defined ethertype),
>>>>> however the hardware is capable of supporting standards-based TRILL as
>>>>> and when the standard is finalised&  ratified.
>>>>>            
>>>> Would that hardware happen be the EARL8? And would there be any chance
>>>> that us "old skool" Cat6500 guys get to share to thrill of TRILL (or
>>>> similar)? :-)
>>>>
>>>> --
>>>> Peter
>>>>
>>>>
>>>> _______________________________________________
>>>> cisco-nsp mailing list  cisco-nsp at puck.nether.net
>>>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>>>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>>>
>>>>          
>>> _______________________________________________
>>> cisco-nsp mailing list  cisco-nsp at puck.nether.net
>>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>>        



More information about the cisco-nsp mailing list