The default route table of a VPC cannot be deleted.
After a VPC is created, its route table will be automatically provided with a default route, indicating that all resources in this VPC are interconnected through the private network. This routing policy cannot be modified or deleted.
Destination | Next hop type | Next hop |
---|---|---|
Local | Local | Local |
Dynamic routing protocols such as BGP and OSPF are not supported.
The support for ECMP varies with routes, as shown in the following table.
Next hop type | Forming ECMP with the same type | Forming ECMP with another type | Maximum ECMP |
---|---|---|---|
NAT Gateway | Supported | Supported, with public IP of CVM | Up to 8 for the same type, and 1 for a different type |
Inter-region peering connection | Not supported | Not supported | N/A |
Cross-region peering connection | Not supported | Supported, with CCN | Up to 1 for a different type |
Direct connect gateway | Not supported | Supported, with CCN | Up to 1 for a different type |
HAVIP | Not supported | Not supported | N/A |
VPN gateway | Not supported | Not supported | N/A |
Public IP of CVM | Not supported | Supported, with CVM or NAT Gateway | Up to 1 for a different type |
CVM | Supported | Supported, with public IP of CVM | Up to 8 for the same type, and 1 for a different type |
CCN | Not supported | Supported, with direct connect gateway or cross-region peering connection | Up to 1 for a different type |
Note:
- Equal Cost Multi-path (ECMP) means that multiple equal-cost routes to a single destination exist.
- To the same destination, the public IP of CVM has a higher priority than that of NAT Gateway.
- Direct connect gateway and CCN can form ECMP. However, the route’s health status will not be checked, and unhealthy routes will not be automatically restricted.
- Multiple NAT Gateway routes can form ECMP. However, the route’s health status will not be checked, and unhealthy routes will not be automatically restricted.
- Multiple CVM routes can form ECMP. However, the route’s health status will not be checked, and unhealthy routes will not be automatically restricted.
Resource | Limit |
---|---|
Number of route tables per VPC | 10 |
Number of route tables associated with each subnet | 1 |
Number of routing policies per route table | 50 |
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