[c-nsp] Central Services Topology - Design question

Harivishnu Abhilash Harivishnu.Abhilash at mannai.com.qa
Mon Jan 13 20:59:54 EST 2020


Thanks. As long as SPOKES won't import other SPOKES, Exported RT values - This (even if we have SPOKE VRF's in same PE) should NOT cause SPOKE-SPOKE traffic to bypass the HUB right ? From the SPOKE perspective the routes imports will be / should be from the HUB VRF only. My initial concern was of hair-pinning of SPOKE TO SPOKE TRAFFIC  from the HUB VRF.  


-----Original Message-----
From: Saku Ytti <saku at ytti.fi> 
Sent: Monday, January 13, 2020 3:25 PM
To: Harivishnu Abhilash <Harivishnu.Abhilash at mannai.com.qa>
Cc: cisco-nsp at puck.nether.net
Subject: [EXTERNAL] Re: Re: [c-nsp] Central Services Topology - Design question

On Mon, 13 Jan 2020 at 13:07, Harivishnu Abhilash <Harivishnu.Abhilash at mannai.com.qa> wrote:

> You recon, this can be an issue only if > 1 Spoke in SAME PE. ?  In my case, spokes will be in different PE. Also HUB sites won't be having any Spoke VRF.

Then you can get away from using half-duplex VRF and do it the simple/easy way. But in many cases these tend to change over time, and if you later get 2nd spoke in any given PE, you're going to have an issue. At least communicate this limitation clearly to your PM and such that once the shit hits the fan, you can show that the limitation was communicated.


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