54 lines
No EOL
2.4 KiB
Markdown
54 lines
No EOL
2.4 KiB
Markdown
# CGNAT Allocation Analysis
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This report analyzes the CGNAT (100.64.x.x) subnet allocations across all network sites to identify which sites use /22 allocations versus other sizes.
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## Summary
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### Sites Using /22 Allocations
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1. **Climax** - 100.64.4.0/22 (100.64.4.0 - 100.64.7.255)
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2. **Culleoka** - 100.64.24.0/22 (100.64.24.0 - 100.64.27.255)
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3. **Site 982** - 100.64.32.0/22 (100.64.32.0 - 100.64.35.255)
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4. **New Hope** - 100.64.16.0/22 (100.64.16.0 - 100.64.19.255)
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5. **Site 380** - 100.64.8.0/22 (100.64.8.0 - 100.64.11.255)
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### Sites Using /20 Allocations
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1. **Site 494** - 100.64.160.0/20 (100.64.160.0 - 100.64.175.255)
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2. **Lowry Crossing** - 100.64.144.0/20 (100.64.144.0 - 100.64.159.255)
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## Detailed Site Information
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### /22 Allocations (1,024 addresses each)
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| Site | CGNAT Subnet | Router IP | Interface |
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|------|-------------|-----------|-----------|
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| Climax | 100.64.4.0/22 | 100.64.7.254/22 | climax-bridge |
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| Culleoka | 100.64.24.0/22 | 100.64.27.254/22 | ether2-netonix |
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| Site 982 | 100.64.32.0/22 | 100.64.35.254/22 | 982 |
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| New Hope | 100.64.16.0/22 | 100.64.19.254/22 | sfp-sfpplus1-edgepoint |
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| Site 380 | 100.64.8.0/22 | 100.64.11.254/22 | combo1-380 |
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### /20 Allocations (4,096 addresses each)
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| Site | CGNAT Subnet | Router IP | Interface |
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|------|-------------|-----------|-----------|
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| Site 494 | 100.64.160.0/20 | 100.64.175.254/20 | 494 |
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| Lowry Crossing | 100.64.144.0/20 | 100.64.159.254/20 | lowrycrossing |
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## Key Observations
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1. **Allocation Size Pattern**:
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- 5 sites use /22 allocations (1,024 addresses)
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- 2 sites use /20 allocations (4,096 addresses)
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2. **Larger Sites**: Sites 494 and Lowry Crossing have 4x larger CGNAT allocations compared to the other sites, suggesting they either serve more customers or were allocated larger blocks for future growth.
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3. **Address Usage**: The /22 sites can support up to 1,022 customer connections (excluding network and broadcast addresses), while the /20 sites can support up to 4,094 customer connections.
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4. **Sequential Allocation**: The /22 allocations appear to be somewhat sequential:
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- 100.64.4.0/22 (Climax)
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- 100.64.8.0/22 (Site 380)
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- 100.64.16.0/22 (New Hope)
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- 100.64.24.0/22 (Culleoka)
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- 100.64.32.0/22 (Site 982)
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5. **Separate Range for /20s**: The /20 allocations are in a different part of the CGNAT space:
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- 100.64.144.0/20 (Lowry Crossing)
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- 100.64.160.0/20 (Site 494) |