Help Center/ Enterprise Router/ User Guide (Ankara Region)/ Service Overview/ Notes and Constraints
Updated on 2024-12-02 GMT+08:00
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Notes and Constraints

Specifications

Table 1 lists the specifications of the enterprise router.

Table 1 Enterprise router specifications

Item

Default Setting

Adjustable

Maximum number of enterprise routers that can be created by each account

1

Contact technical support.

Maximum forwarding capability supported by each enterprise router

100 Gbit/s

Contact technical support.

Constraints

There are some constraints on using enterprise routers, as described in Table 2. You can follow our suggestions to handle these issues.

Table 2 Constraints on enterprise routers

Constraint

Suggestion

If a service VPC is being used by ELB, VPC Endpoint, NAT Gateway (private NAT gateway), Distributed Cache Service (DCS), or hybrid DNS, this VPC cannot be attached to an enterprise router.

NOTICE:

If you attach a service VPC to an enterprise router when Elastic Load Balance (ELB), VPC Endpoint, or DCS is being used together with Enterprise Router, persistent connections may be intermittently interrupted during service reliability assurance, such as a DR switchover, an upgrade, or elastic scaling. Ensure that the clients are capable of automatic reconnection in case of intermittent disconnection.

Contact technical support to confirm the service compatibility. A transit VPC is preferred for networking. For details, see scheme 2 in "Selecting a Networking Scheme" in "Getting Started".
Traffic cannot be forwarded from a VPC to the enterprise router that the VPC is attached to if you set the destination of a route whose next hop is the enterprise router to 0.0.0.0/0 in the VPC route table and if:
  • An ECS in the VPC has an EIP bound.
  • The VPC is being used by ELB (either dedicated or shared load balancers), NAT Gateway, VPC Endpoint, and DCS.
  • Suggestion 1:

    Change the destination address of the route. For details, see the FAQ "Why Traffic Can't Be Forwarded from a VPC with a Route Destination of 0.0.0.0/0 to Its Enterprise Router?"

  • Suggestion 2:

    Use a transit VPC for networking. For details, see scheme 2 in "Selecting a Networking Scheme" in "Getting Started".

If a VPC attached to an enterprise router has a NAT gateway associated and Scenario of the SNAT or DNAT rules is set to Direct Connect, the network from the on-premises data center to the VPC is disconnected.

Use a transit VPC for networking. For details, see scheme 2 in "Selecting a Networking Scheme" in "Getting Started".
Parent topic: Service Overview