[AusNOG] Assistance with Cisco vPC configuration on 4 x Cisco Nexus 3000 switches

[Ahad Aboss]

Radeck,

To avoid blocked ports, you will need to configure your upstream links as
follows;

Built a port-channel from SW13 to SW11/12.
Build a port-channel from SW14 to SW11/12.

Physically, SW 11 and 12 looks as 2 x Switches but logically, SW 13 and 14
treats SW11/12 as a single switch.

I suggest using at least 2 x 10GE ports between SW13 & 14 as SFP's do fail
from time to time.
You can use MGM for peer link keep alive or a dedicated link.

You can increase your port-channel capacity as your traffic grows.

Ahad

On Mon, Nov 26, 2018 at 10:16 AM Radek Tkaczyk <radek at tkaczyk.id.au> wrote:

> Hi Guys,
>
>
>
> So from the feedback so far is that we should also link SW-13 and SW-14
> directly – updated as below.
>
>
>
> The primary purpose for this design is to ensure redundancy across
> switches, and to be able to provide approx. 50 x 10Gbps ports, and 50 x 1
> Gbps ports – this also leaves heaps of room for growth as well.
>
>
>
> Still looking for someone to go over the config with, so if you are
> interested (paid gig) please let me know.
>
>
>
>
>
>
>
> Thanks
>
>
>
> Radek
>
>
>
> *From:* AusNOG [mailto:ausnog-bounces at lists.ausnog.net] *On Behalf Of *Radek
> Tkaczyk
> *Sent:* Sunday, 25 November 2018 4:34 PM
> *To:* Jacob Taylor <me at jacobtaylor.id.au>
> *Cc:* <ausnog at lists.ausnog.net> <ausnog at lists.ausnog.net>
> *Subject:* Re: [AusNOG] Assistance with Cisco vPC configuration on 4 x
> Cisco Nexus 3000 switches
>
>
>
> Hi Jake,
>
>
>
> That’s something that I wanted to check if it was needed/recommended.
>
>
>
> Can certainly put it in if it will help achieve better performance and
> redundancy
>
> Thanks
>
>
>
> Radek
>
>
> On 25 Nov 2018, at 4:26 pm, Jacob Taylor <me at jacobtaylor.id.au> wrote:
>
> Hi Radek,
>
>
>
> Not personally familiar with vPC, more so Arista MLAG and Juniper MC-AE.
>
>
>
> In the diagram there isn’t a peer link between 13 & 14 - is that a mistake
> in the diagram or the actual design?
>
>
>
> If you intend to build 2x20G bonds to two standalone nexus switches,
> that’ll work fine.
>
>
>
> If you are trying to achieve a 40G bowtie between the two pairs I’m fairly
> certain that won’t work (unless Cisco has some special black magic to
> transport signalling/MAC synchronisation over the bond itself).
>
>
>
> Cheers,
>
> Jake
>
>
>
>
>
>
> On 25 Nov 2018, at 15:04, Radek Tkaczyk <radek at tkaczyk.id.au> wrote:
>
> Hi Guys,
>
>
>
> I have a need to configure vPC on 4 x Cisco Nexus 3000 switches at one of
> our data centres – a design that we will replicate to other data centres as
> well.
>
>
>
> I think I have the config down pat, but I’d like someone with another pair
> of eyes to go over it with me to ensure it’s 100% correct.
>
>
>
> Is there anyone who can give me a hand here with this configuration, happy
> to pay for someone’s time to go over it to ensure we are doing this
> correctly.
>
>
>
> The Physical setup that I’m looking for:
>
>
>
>
>
> <image001.png>
>
>
>
> Thanks
>
>
>
> Radek
>
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