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- What's New
- Function Overview
- Service Overview
- Getting Started
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User Guide
- Elastic IP
- EIP Billing
- Shared Bandwidth
- Monitoring
- Permissions Management
- Change History
- Best Practices
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API Reference
- Before You Start
- API Overview
- Calling APIs
- APIs
- API V3
- Native OpenStack Neutron APIs V2.0
- Application Examples
- Permissions Policies and Supported Actions
- Appendix
- Change History
- SDK Reference
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FAQs
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Product Consultation
- What Is a Quota?
- How Do I Assign or Retrieve a Specific EIP?
- Why Is an EIP Newly Assigned the Same as the One I Released?
- What Are the Differences Between EIP, Private IP Address, and Virtual IP Address?
- Can an EIP That Uses Dedicated Bandwidth Be Changed to Use Shared Bandwidth?
- Can I Bind an EIP to Multiple ECSs?
- What Are the Differences Between the Primary and Extension NICs of ECSs?
- What Is the EIP Assignment Policy?
- Can I Buy a Specific EIP?
- Does an EIP Change Over Time?
- How Do I Query the Region of My EIPs?
- Can a Bandwidth Be Used by Multiple Accounts?
- How Do I Unbind an EIP from an Instance and Bind a New EIP to the Instance?
- Why Can't I Find My Purchased EIP on the Management Console?
- Why My EIPs Are Frozen? How Do I Unfreeze My EIPs?
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Billing and Payments
- How Is an EIP Billed?
- How Do I Change My EIP Billing Mode Between Pay-per-Use and Yearly/Monthly?
- How Do I Change the Billing Option of a Pay-per-Use EIP Between By Bandwidth and By Traffic?
- What Is Enhanced 95th Percentile Bandwidth Billing?
- Why Am I Still Being Billed After My EIP Has Been Unbound or Released?
- When Will I Be Billed for Reservation Price?
- EIP Binding and Unbinding
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Bandwidth
- What Bandwidth Types Are Available?
- Is There a Limit to the Number of EIPs That Can Be Added to Each Shared Bandwidth?
- What Are the Differences Between a Dedicated Bandwidth and a Shared Bandwidth?
- What Are Inbound Bandwidth and Outbound Bandwidth?
- How Do I Know If My EIP Bandwidth Limit Has Been Exceeded?
- What Is the Relationship Between Bandwidth and Upload/Download Rate?
- What Are the Differences Between Static BGP and Dynamic BGP?
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Connectivity
- What Are the Priorities of the Custom Route and EIP If Both Are Configured for an ECS to Enable the ECS to Access the Internet?
- Why Can't My ECS Access the Internet Even After an EIP Is Bound?
- Why Can't an EIP Be Pinged?
- How Do I Unblock an EIP?
- Why Is There Network Jitter or Packet Loss During Cross-Border Communications?
- Why Does the Download Speed of My ECS Is Slow?
- Change History
-
Product Consultation
- Symptom
- Troubleshooting
- Step 1: Check Whether the ECS Is Running Properly
- Step 2: Check Whether the Network Configuration of the ECS Is Correct
- Step 3: Check Whether an EIP Has Been Assigned and Bound to the ECS
- Step 4: Check Whether an EIP Is Bound to the Primary NIC of the ECS
- Step 5: Check Whether Required Security Group Rules Have Been Configured.
- Step 6: Check Whether Traffic from the ECS Subnet Is Blocked
Show all
Why Can't My ECS Access the Internet Even After an EIP Is Bound?
Symptom
An ECS with an EIP bound cannot access the Internet.
Troubleshooting
Checking Whether EIPs Are Blocked or Frozen
- Check whether the EIP is blocked. For details, see How Do I Unblock an EIP?
- Check whether the EIP is frozen. For details, see Why My EIPs Are Frozen? How Do I Unfreeze My EIPs?
Checking EIP Connectivity
Figure 1 shows the networking diagram for an ECS to access the Internet using an EIP.
Locate the fault based on the following procedure.
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- Step 1: Check Whether the ECS Is Running Properly
- Step 2: Check Whether the Network Configuration of the ECS Is Correct
- Step 3: Check Whether an EIP Has Been Assigned and Bound to the ECS
- Step 4: Check Whether an EIP Is Bound to the Primary NIC of the ECS
- Step 5: Check Whether Required Security Group Rules Have Been Configured.
- Step 6: Check Whether Traffic from the ECS Subnet Is Blocked
Step 1: Check Whether the ECS Is Running Properly
Check the ECS status.
If the ECS status is not Running, start or restart the ECS.
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Step 2: Check Whether the Network Configuration of the ECS Is Correct
- Check whether the ECS NIC has an IP address assigned.
Log in to the ECS, and run ifconfig or ip address to check the ECS NIC IP address.
- Check whether the ECS NIC has a virtual IP address.
Log in to the ECS, and run ifconfig or ip address to check whether the ECS NIC has a virtual IP address. If the ECS NIC has no virtual IP address, run the ip addr add virtual IP address eth0 command to configure an IP address for the ECS NIC.
Figure 4 Virtual IP address of a NICCheck whether the ECS NIC has a default route. If there is no default route, run ip route add to add one.
Figure 5 Default route
Step 3: Check Whether an EIP Has Been Assigned and Bound to the ECS
Check whether an EIP has been assigned and bound to the ECS. If no EIP has been assigned, assign an EIP and bind it to the ECS.
Step 4: Check Whether an EIP Is Bound to the Primary NIC of the ECS
Check whether an EIP is bound to the primary NIC of the ECS. If there is no EIP bound to the primary NIC of the ECS, bind one.
You can view the NIC details by clicking the NICs tab on the ECS details page. By default, the first record in the list is the primary NIC.
As shown in Figure 7, the EIP is bound to the primary NIC.
Step 5: Check Whether Required Security Group Rules Have Been Configured.
For details about how to add security group rules, see Adding a Security Group Rule.
If security group rules have not been configured, configure them based on your service requirements. (The remote IP address indicates the allowed IP address, and 0.0.0.0/0 indicates that all IP addresses are allowed.)
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