Azure ExpressRoute
An Azure service that provides private connections between Azure datacenters and infrastructure, either on premises or in a colocation environment.
430 questions
How do get Microsoft to validate an updated prefix list in a Microsoft peering across an Express route. IRR is already correct.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(60.8, 80%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EGA%3C/text%3E%3C/svg%3E)
GoMomentumOC Admin
5
Reputation points
Our peering has had 2 /28s in it for some time, validated. We added another /28 and a /24 in the portal, and our IRR is correct with ARIN, but the portal has said "Status: Validation Needed" for over 4 weeks. How can we get Microsoft to clear the "validation needed" or get feedback on what is required to do so?
Azure ExpressRoute
{count} vote
-
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(54.400000000000006, 71%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EGP%3C/text%3E%3C/svg%3E)
Ganesh Patapati 5,515 Reputation points Microsoft External Staff2025-03-17T19:02:35.1866667+00:00 - Could you please share a screenshot of the exact message that was displayed in the portal so that we can examine the issue in more detail?
Meantime,
please check the below technical requirements to validate an updated prefix list in a Microsoft peering across an Express route.
For a registered prefix to be validated after creation, the following checks must pass:
- The prefix can't be in a private range
- The origin ASN must be registered in a major routing registry
- The prefix must be announced from all peering sessions
- Routes must be advertised with the Peering Service community string 8075:8007
- AS paths in your routes can't exceed a path length of 3, and can't contain private ASNs or AS prepending
Should there be any follow-up questions or concerns, please let us know and we shall try to address them.
-
Ganesh Patapati 5,515 Reputation points Microsoft External Staff
2025-03-18T13:07:07.82+00:00 - Could you please share a screenshot of the exact message that was displayed in the portal so that we can examine the issue in more detail?
-
Ganesh Patapati 5,515 Reputation points Microsoft External Staff
2025-03-19T10:27:47.3066667+00:00 - Could you please share a screenshot of the exact message that was displayed in the portal so that we can examine the issue in more detail?
-
GoMomentumOC Admin 5 Reputation points
2025-03-19T14:01:29.9666667+00:00 Comment removed - incorrect information.
-
Ganesh Patapati 5,515 Reputation points Microsoft External Staff
2025-03-20T14:28:17.8933333+00:00 Hello GoMomentumOC Admin
According to the error message, could you please contact [email protected] and inform us of the result?
-
GoMomentumOC Admin 5 Reputation points
2025-03-20T16:48:56.55+00:00 This is the wrong Screenshot, my apologies. I will update shortly
-
GoMomentumOC Admin 5 Reputation points
2025-03-20T20:10:07.04+00:00 This is the correct screenshot for this issue
Sign in to comment
Sign in to answer