BGP Community Directory
| Community | Set By | Description |
| 6128:0 | CST | Do NOT export to *any* external peer |
| 6128:1 | CST | prepend 6128 once at non-customer borders/private peers |
| 6128:2 | CST | prepend 6128 twice at non-customer borders/private peers |
| 6128:3 | CST | prepend 6128 thrice at non-customer borders/private peers |
| Local Preference Settings | ||
| 6128:95 | CST | Local Preference for directly connected, non-customer networks. [non-customer default] |
| 6128:100 | CST | BGP Customer Local Preference [customer default] |
| 6128:110 | CST | BGP Customer Local Preference 110 |
| 6128:120 | CST | BGP Customer Local Preference 120 |
| Export Rules | ||
| 6128:600 | CST | Do NOT export announcement to transit peers |
| 6128:610 | CST | Do NOT export to public peers [send to transit and public peers] |
| 6128:666 | CST | Do NOT export to non-customer peers [send to customer peers only] |