[c-nsp] Nexus OTV Question

[quinn snyder]

there are a couple of nasty bugs in 5.1(2) with regards to peer-gateway. 
  peer-gateway will blackhole traffic for ipv4 and v6 if enabled in your 
domain.  not sure of your storage scenario -- but it sounds like your 
slowly building out and may need this command in your toolbox for a 
later day.

CSCtl10832 and CSCtl11424 are what you're looking for[0]

this has kept us off the upgrade path for this code and we're keeping 
our fingers crossed for 5.1(3).

[0]http://www.cisco.com/en/US/docs/switches/datacenter/sw/5_x/nx-os/release/notes/51_nx-os_release_note.html#wp263416

q.

On 03/01/2011 11:00 PM, Martin Clifton wrote:
> This problem occurred with the 7K NX-OS 5.1.1a. Upgrading to 5.1.2
> resolved the problem.
>
> Regards, Martin
>
> ---------------------------------
> Martin Clifton
> ITS - Networks and Computing
> Victoria University
> Melbourne, Australia
>
> Phone: 03 9919 4579
> ---------------------------------
>
>
>
>
>
> On 28/02/11 10:16 AM, "Martin Clifton"<Martin.Clifton at vu.edu.au>  wrote:
>
>> Hello all,
>>
>> We have a pair of Nexus 7Ks at each of our two datacentres, separated by
>> about 10K.   There is a 40G L3 connection between the cores at each site
>> and we run OTV over this core to provide L2 connectivity betweens the
>> DCs.  As well as setting up new vlans on the Nexus kit (5Ks and 2Ks) we
>> are also using the OTV connection to transport vlans from our legacy
>> datacentre which is based on Cat6509s and 3750s.
>>
>> I have a concern about the table that is displayed when you enter the
>> command "sh otv route".   This table shows entries for "site" (ie local)
>> and "overlay" (ie other DC)  mac addresses.    The issue is with the
>> "Uptime" data.  For the overlay addresses this will randomly reset to
>> zero and all addresses will reset to zero at the one time.   The
>> frequency of this reset seems to be a function of the number of vlans ie
>> the more vlans I add to the overlay, the more often the value resets.
>> With 100 or more vlans the value may build up to a minute or two but will
>> often only get to a few seconds before resetting.
>>
>> This doesn't appear to impact the functionality of OTV.   But does it
>> indicate I have a problem ?   What is it that causes the reset and why
>> are all the (overlay) mac addresses reset at the same time ?    The
>> symptoms occur whether or not "otv suppress-arp-nd" is enabled or not.
>>
>> Regards, Martin
>>
>> ---------------------------------
>> Martin Clifton
>> ITS - Networks and Computing
>> Victoria University
>> Melbourne, Australia
>>
>> Phone: 03 9919 4579
>> ---------------------------------
>>
>>
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