Why Cannot I Ping My EIP After It Is Bound to a DB Instance?

1. On the Instances page, click the instance name to go to the Basic Information page.
2. In the Network Information area on the Basic Information page, click the security group.
3. Check whether the ECS NIC security group allows the inbound ICMP traffic.

   Table 1 Security group rules

   Direction	Type	Protocol/Port Range	Source IP Address
   Inbound	IPv4	Any: Any	0.0.0.0/0 (all IP addresses)
   Inbound	IPv4	ICMP: Any	0.0.0.0/0 (all IP addresses)

1. Check the network ACL status.
2. Check whether the NIC to which the EIP bound belongs to the subnet associated with the network ACL.
3. If the network ACL is enabled, add an ICMP rule to allow traffic.

The default network ACL rule denies all incoming and outgoing packets. After the network ACL is disabled, the default rule still takes effect.

If the affected EIP can be pinged from another ECS in the same region, the virtual network is functional. In such a case, contact customer service for technical support.