This topic describes how to upgrade a Basic Edition transit router to an Enterprise Edition transit router.
Background information
During the upgrade, the system automatically deletes the cloud service configurations
on the Basic Edition transit router. After the upgrade is completed, you can configure
cloud services on the transit router based on your business requirements.
During the upgrade, the dynamic routes that are learned by the virtual private cloud
(VPC) from Cloud Enterprise Network (CEN) are converted to custom routes. The next
hop of the custom routes points to the Enterprise Edition transit router. The conversion does not affect your services.
After the upgrade is completed, the VPC cannot learn new routes from CEN. To modify
the network connectivity of the VPC, you can add or delete custom routes. For more
information, see Add and delete route entries.
For example, after the upgrade is completed, the Enterprise Edition transit router is connected to a new VPC and the default configurations are used for the connection.
If you want to connect the existing VPC to the new VPC, you must add a custom route
to the existing VPC. You must set the destination CIDR block of the custom route to
the CIDR block of the new VPC, and set the next hop to the Enterprise Edition transit router.
You can upgrade a Basic Edition transit router to an Enterprise Edition transit router only in specific regions.
Area
Region
Zone
Chinese mainland
China (Hangzhou)
Zone H and Zone I
China (Shanghai)
Zone F and Zone G
China (Nanjing - Local Region)
Zone A
China (Shenzhen)
Zone D and Zone E
China (Heyuan)
Zone A and Zone B
China (Guangzhou)
Zone A and Zone B
China (Qingdao)
Zone B and Zone C
China (Beijing)
Zone H and Zone G
China (Zhangjiakou)
Zone A and Zone C
China (Hohhot)
Zone A and Zone B
China (Ulanqab)
Zone A and Zone B
China (Chengdu)
Zone A and Zone B
Asia Pacific
Singapore (Singapore)
Zone B and Zone C
China (Hong Kong)
Zone B and Zone C
Malaysia (Kuala Lumpur)
Zone A and Zone B
India (Mumbai)
Zone A and Zone B
Indonesia (Jakarta)
Zone A and Zone B
Philippines (Manila)
Zone A
Japan (Tokyo)
Zone A and Zone B
Europe
Germany (Frankfurt)
Zone A and Zone B
UK (London)
Zone A and Zone B
North America
US (Virginia)
Zone A and Zone B
US (Silicon Valley)
Zone A and Zone B
Australia
Australia (Sydney)
Zone A and Zone B
Step 1: Schedule an upgrade
You must schedule an upgrade. Before you schedule an upgrade, you must determine the
start time and a time window for the upgrade.
After you schedule an upgrade, Alibaba Cloud applies for resources for the upgrade
within 72 hours. You cannot upgrade a Basic Edition transit router before the resources are allocated. Therefore, we recommend that you reserve sufficient
time for Alibaba Cloud to apply for the required resources. If you need an emergency
upgrade, contact your business manager.
During the upgrade, network connections may be disrupted. We recommend that you migrate
business traffic before the upgrade, notify users of network changes, and perform
the upgrade during off-peak hours.
The upgrade requires 10 to 20 minutes. To ensure a smooth upgrade, we recommend that
you reserve an upgrade window of 1 hour.
On the Instances page, find the CEN instance that you want to manage and click the instance ID.
On the details page of the CEN instance, you can use one of the following methods
to go to the Upgrade Guide page.
On the Basic Settings > Transit Router tab, find the Basic Edition transit router that you want to upgrade and click Upgrade Now in the Edition column.
On the Basic Settings > Transit Router tab, find the Basic Edition transit router that you want to upgrade and click the ID of the transit router. On the details page
of the transit router, click the Basic Settings tab. Click Upgrade Now next to Version.
In the Upgrade Transit Routers to Enterprise Edition dialog box, view the features of and billing information about the Enterprise Edition transit router, and click Upgrade.
On the Schedule Upgrade wizard page, select the primary and secondary zones of the Enterprise Edition transit router and click Schedule Upgrade.
The Enterprise Edition transit router creates an elastic network interface (ENI) on the vSwitches in the primary and secondary
zones. The ENIs receive traffic from the VPC to the Enterprise Edition transit router. For more information about the zones in which you can create an Enterprise Edition transit router, see the Background information section in this topic.
After you schedule an upgrade, Alibaba Cloud applies for the required resources and
approves your application within 72 hours. After your application is approved, the
value of the Status parameter on the Schedule Upgrade page changes to Migrated.
Step 2: Prepare for the upgrade
Before you perform an upgrade, you must perform the following steps to prepare for
the upgrade.
If your Basic Edition transit router is connected to a VPC, you must create vSwitches for the VPC.
Before the upgrade, make sure that at least one vSwitch is created in the primary
and secondary zones of the Enterprise Edition transit router for each VPC that is connected to the Basic Edition transit router. The Enterprise Edition transit router creates an ENI on the vSwitches in the primary and secondary zones to receive traffic
from the VPC to the Enterprise Edition transit router. The ENI uses one IP address of the vSwitch. Make sure that the vSwitch has sufficient
IP addresses. For more information, see Create a vSwitch.
For example, if you want to upgrade a Basic Edition transit router in the China (Hangzhou) region and the Basic Edition transit router is connected to VPC1 and VPC2, make sure that at least one vSwitch is created in
Zone H and Zone I of VPC1, and that at least one vSwitch is created in Zone H and
Zone I of VPC2.
Note
When you create a vSwitch, we recommend that you use a subnet mask that does not exceed
28 bits in length.
If the Basic Edition transit router that you want to upgrade is connected to a virtual border router (VBR), you do not
need to perform additional operations on the VBR before you perform the upgrade.
Back up routes.
Before you upgrade the Basic Edition transit router, we recommend that you back up
all routes of the CEN instance to which the transit router belongs. After the upgrade
is completed, you can compare the routes to make sure that the routes after the upgrade
are the same as the routes before the upgrade.
On the Instances page, find the CEN instance that you want to manage and click the instance ID.
On the details page of the CEN instance, you can use one of the following methods
to go to the Upgrade Guide page.
On the Basic Settings > Transit Router tab, find the Basic Edition transit router that you want to upgrade and click Upgrade Now in the Edition column.
On the Basic Settings > Transit Router tab, find the Basic Edition transit router that you want to upgrade and click the ID of the transit router. On the details page
of the transit router, click the Basic Settings tab. Click Upgrade Now next to Version.
In the Upgrade Transit Routers to Enterprise Edition dialog box, click Upgrade.
On the Schedule Upgrade wizard page, click Next.
On the Specify vSwitch wizard page, set the following parameters and click Next.
Parameter
Description
Select the primary and secondary zones for the transit router
The system automatically uses the primary and secondary zones that you specify on
the Schedule Upgrade page.
Delete Default Cloud Service
Select Delete Default Cloud Service.
Select the vSwitch to which the VPC is connected
Select vSwitches for the VPC.
The Enterprise Edition transit router creates an ENI on each vSwitch that you specify.
On the Configure VPC Routes wizard page, select Automatically Switch to Static Routes and click Next.
On the Confirm Settings and Price wizard page, confirm the information about the network instance, view the billing
information, and then click Next.
After you complete the preceding configurations, the system automatically starts the
upgrade. Do not close the upgrade window until the upgrade is completed.
Step 4: Configure cloud services
After the upgrade is completed, you can configure cloud services based on your business
requirements. For more information, see Access cloud services and Configure PrivateZone.
Step 5: Verify the network connectivity
After you complete the preceding configurations, you must compare the routes and verify
the network connectivity to make sure that the upgrade is successful.
Compare routes.
You can perform the following operations to view or download the information about
routes after the upgrade, and then compare the routes to make sure that the routes
after the upgrade are the same as the routes before the upgrade.