Help Center/ Direct Connect/ Troubleshooting/ Network and Connectivity Issues
Updated on 2025-08-13 GMT+08:00
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Network and Connectivity Issues

Network Issues

If the connection fails to work normally after you created a virtual interface to connect your on-premises network to the cloud, perform the following steps to locate the fault:

  1. Verify that the local gateway can be pinged from the remote gateway and that the VLAN of the intermediate device is configured correctly.
  2. Verify that IP addresses of the local and remote gateways are in the same CIDR block and are configured on the VLAN sub-interfaces.
  3. If static routing is used, verify that the next hop or outbound interface of the static route is configured correctly.
  4. If BGP routing is used, verify that:
    • BGP ASN, BGP MD5 authentication key, and BGP peer IP address are configured correctly.
    • BGP ASNs on both gateways are different.
    • There are no more than 100 BGP routes propagated through the virtual interface.
    • There are no rules for prohibiting TCP port 179 or dynamic TCP ports.

Connectivity Issues

If network connectivity is abnormal after you have connected the leased line to the endpoint device, perform the following steps to locate the fault:

  1. Verify that the network device is connected correctly, auto-negotiation is disabled for the optical port, and the port speed and full-duplex mode are configured correctly.
  2. Verify that optical signals can be normally transmitted and received.