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Update CIDR ranges with new allocation for nonlive #8439

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David Elliott (davidkelliott) merged 2 commits into from
Aug 7, 2026
Merged

Update CIDR ranges with new allocation for nonlive #8439

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7a77194
Update CIDR ranges with new allocation for nonlive
davidkelliott Aug 7, 2026
ac6a71c
Add secondary range as well
davidkelliott Aug 7, 2026
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18 changes: 10 additions & 8 deletions cidr-allocation.md
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Original file line number Diff line number Diff line change
Expand Up @@ -7,15 +7,16 @@
| 100.64.0.0/10 | /10 | Pod IPs | RFC6598, not externally routable |
| 172.20.0.0/16 | /16 | Existing Cloud Platform Cluster | Routable |

## Platform and Shared Infrastructure (10.195.0.0/16, lower range)
## Platform and Shared Infrastructure (10.195.0.0/16)

| VPC | CIDR | Mask | Addresses | Purpose |
| :----------------------------- | :------------ | :--- | --------: | :------------------------------------------------ |
| Hub cluster (Cloud Platform) | 10.195.0.0/20 | /20 | 4,096 | Argo CD, KRO, OpenSearch — ~250 pods, few nodes |
| Hub preproduction | 10.195.16.0/20 | /20 | 4,096 | Preproduction Hub |
| Dev clusters (shared) | 10.195.32.0/20 | /20 | 4,096 | Up to 10 CP engineer dev clusters sharing one VPC |
| Hub live (cloud-platform-live) | 10.195.0.0/20 | /20 | 4,096 | Argo CD, KRO, OpenSearch — ~250 pods, few nodes |
| Hub nonlive (cloud-platform-nonlive) | 10.195.192.0/20 | /20 | 4,096 | Argo CD, KRO, OpenSearch — ~250 pods, few nodes |
| Hub preproduction (cloud-platform-preproduction) | 10.195.16.0/20 | /20 | 4,096 | Preproduction Hub |
| Dev clusters (shared, cloud-platform-development) | 10.195.32.0/20 | /20 | 4,096 | Up to 10 CP engineer dev clusters sharing one VPC |

### BU Non-Live Clusters (10.195.0.0/16, upper range)
### BU Non-Live Clusters (10.195.0.0/16)

| VPC | CIDR | Mask | Addresses | Assigned BU |
| :------------ | :-------------- | :--- | --------: | :---------- |
Expand All @@ -28,7 +29,8 @@
| BU-7 non-live | 10.195.144.0/20 | /20 | 4,096 | CICA |
| BU-8 non-live | 10.195.160.0/20 | /20 | 4,096 | OPG |
| BU-9 non-live | 10.195.176.0/20 | /20 | 4,096 | Unassigned |
| Free | 10.195.192.0/18 | /18 | 16,384 | Unassigned |
| Free | 10.195.208.0/18 | /20 | 4,096 | Unassigned |
| Free | 10.195.224.0/19 | /18 | 8,190 | Unassigned |

### BU Live Clusters (10.41.0.0/16)

Expand All @@ -53,10 +55,10 @@ Each EKS cluster receives a /16 from the RFC6598 range for pod IPs.

| Cluster | Secondary CIDR | Pod IPs | Notes |
| :-------------------- | :------------- | -------: | :------------------------------------------------- |
| Hub cluster | 100.64.0.0/16 | 65,536 | ~250 pods; included for configuration consistency. |
| Hub live | 100.64.0.0/16 | 65,536 | ~250 pods; included for configuration consistency. |
| Hub preproduction | 100.65.0.0/16 | 65,536 | ~250 pods; included for configuration consistency. |
| Dev clusters (shared) | 100.66.0.0/16 | 65,536 | Shared across up to 10 dev clusters |
| Free | 100.67.0.0/16 | 65,536 | Kept free for future platform use |
| Hub nonlive | 100.67.0.0/16 | 65,536 | ~250 pods; included for configuration consistency. |
| BU-1 non-live | 100.68.0.0/16 | 65,536 | OCTO |
| BU-2 non-live | 100.69.0.0/16 | 65,536 | HMPPS |
| BU-3 non-live | 100.70.0.0/16 | 65,536 | LAA |
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