Add CIDR Block

You can add CIDR blocks to a running instance on demand. The BGP announcement configuration updates automatically without interrupting your service.

Prerequisites

• The instance is Running.

Procedures

Option 1: Instance list

In the row of the target instance, click Actions > Add CIDR Block.

Option 2: Instance detail page

Go to the instance detail page, find the CIDR block section under Network Configuration, and click Add.

1. In the dialog, select the IP type and block size.

2. Click Add CIDR Block to confirm.

Result

After submission, the instance enters Processing state while the new CIDR goes through the following stages:

IP Allocation → IP Configuration → Complete

When delivery succeeds, the instance returns to Running. The new CIDR block appears in the list and the BGP routing table on the edge router updates automatically.

Note

• You cannot perform other operations while the instance is in Processing state.

• IP Transit instances on the Standard BGP tier do not support adding CIDR blocks. See BGP Tiers.

• In Static Routing Mode and Gateway Mode, at least one public CIDR block must remain, so you can only delete a CIDR block if at least two are configured. In BGP Routing Mode, you can delete all CIDR blocks.