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Help Center/ Direct Connect/ Service Overview/ Notes and Constraints

Notes and Constraints

Updated on 2024-11-28 GMT+08:00

Resource

Default Quota

How to Increase Quota

Number of connections that can be created by an account in each region

10

Submit a service ticket.

Number of virtual gateways that can be created by an account in each region

5

Submit a service ticket.

Number of virtual interfaces that can be created by an account in each region

50

Submit a service ticket.

Number of local subnets for a virtual gateway

50

Increasing the quota is not allowed.

Number of routes for BGP sessions on a virtual interface

100

Submit a service ticket.

Number of remote subnets for a virtual interface

50

Submit a service ticket.

Restrictions on Locations

Before creating a connection, you need to select a location. Note the following restrictions:

  • There may be more than one location in each region. In this case, network latency from each location to different AZs in the region should be less than 5 ms.
  • If your workloads have demanding requirement for network latency, you can submit a service ticket to confirm which location is the nearest to the AZ where your cloud servers are running.

Product Use Restrictions

  • The CIDR block of the VPC cannot overlap with the CIDR block used by the on-premises network.

    The on-premises network cannot use 100.64.0.0/10, 127.0.0.0/8, 169.254.0.0/16, and 224.0.0.0/3 because they are reserved for the VPC service.

  • 1GE and 10GE single-mode optical ports can transmit data up to 10 km. If you need an optical port to transmit data for more than 10 km, or you need a 40GE or 100GE port, you need to buy optical modules by yourself. For suggestions on optical module selection, submit a service ticket .
  • If you use a Direct Connect connection to access ELB, you must select Source IP hash as the load balancing algorithm and disable sticky sessions for ELB.
  • By default, Direct Connect is not interconnected with Enterprise Switch. To access Enterprise Switch using Direct Connect, submit a service ticket.
  • Direct Connect can respond to common ICMP packets (echo packets whose type is 8 and code is 0 and do not carry IP options) for ping detections.
  • For each connection, a maximum of 30 ping detections can be performed on the local gateway IP address over the port per second.
  • To connect on-premises data centers through enterprise routers, ensure that the on-premises data centers are connected to different devices. For details, submit a service ticket.
  • A virtual gateway can be associated with only two different devices.

Construction Notes

  • Your construction company must comply with the regulations presented by the equipment room carrier and engineers. In case of any violation, the construction cannot be completed.
  • No optical-to-electrical converters can be hosted or installed in the equipment room.
  • Network blocking due to state policies or Huawei Cloud management will delay the construction. In the event of such situation, contact your Direct Connect manager.
  • The equipment room at a location is operated by a telecom carrier or a third party. If there are fees for connecting your leased line to the equipment room or an in-building cable, pay the fees to the equipment room carrier.
  • You need to apply for a Letter of Authorization (LOA) and present the LOA when entering the equipment room for construction.

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