[c-nsp] IPv6 VPC Port channel Nexus -- 2951

[Scott Voll]

it ended up being a Port channel issue.  the router needed mode on rather
than mode active.  IPv4 was able to work without the port channel working
where as IPv6 was seeing a loop.  Fixed the port channel issue and
everything worked.

scott

On Mon, Oct 31, 2016 at 8:51 AM, John Kougoulos <john.kougoulos at gmail.com>
wrote:

>
> Hi,
>
> On Wed, Oct 26, 2016 at 9:06 PM, Scott Voll <svoll.voip at gmail.com> wrote:
>
>> So I have a 2951 setup with a Port-channel to a set of L3 Nexus 5548's on
>> a
>> VPC.
>>
>>
> Well, I don't know specifically about IPv6, but in general, connectivity
> between a router and nexus using vPC is not recommended, but the result is
> also very platform specific.
> The preferred way if I remember correctly is to have 2 separate l3 links
> and use eg OSPF instead of etherchannel for load balancing & redundancy.
> You may read more here: https://www.cisco.com/en/US/
> docs/switches/datacenter/nexus5000/sw/mkt_ops_guides/
> 513_n1_1/n5k_L3_w_vpc_5500platform.pdf.
> Maybe IPv6 is a bit more problematic than IPv4 because of the use of
> multicast.
>
> Kind regards,
> John
>
>
>
>