This topic describes how to upgrade Basic Edition transit routers to Enterprise Edition.
Background information
During the upgrade, the system automatically deletes the cloud service configurations
from the Basic Edition transit router. After the upgrade is completed, you can configure
cloud services on the transit router based on your business requirements.
If virtual private clouds (VPCs) are connected to the Basic Edition transit router
that you want to upgrade, the system converts routes that the VPCs automatically learn
from Cloud Enterprise Network (CEN) to custom routes whose next hop is an Enterprise Edition transit router. The conversion does not affect your services.
After the upgrade is completed, the VPCs cannot learn new routes from CEN. To adjust
network communication for the VPCs, you can add or delete custom routes. For more
information, see Add and delete routes.
For example, after the upgrade is completed, the Enterprise Edition transit router is connected to a new VPC. The connection between the Enterprise Edition transit
router and the new VPC uses the default configurations. If you want to connect an
existing VPC to the new VPC, 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 custom route that points to the existing VPC.
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, Zone I, Zone J, and Zone K
China (Shanghai)
Zone F, Zone G, Zone E, Zone B, Zone N, Zone M, and Zone L
China (Nanjing - Local Region)
Zone A
China (Fuzhou - 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, Zone G, Zone J, Zone K, Zone I, and Zone L
China (Zhangjiakou)
Zone A, Zone B, and Zone C
China (Hohhot)
Zone A and Zone B
China (Ulanqab)
Zone A, Zone B, and Zone C
China (Chengdu)
Zone A and Zone B
Asia Pacific
Singapore (Singapore)
Zone A, 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
South Korea (Seoul)
Zone A
Thailand (Bangkok)
Zone A
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
the workloads 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. Then, click Upgrade Now on the right side of 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 zones of the Enterprise Edition transit router and click Schedule Upgrade.
Enterprise Edition transit routers are supported in one or multiple zones within a
region. When you create a VPC connection, the Enterprise Edition transit router creates
an elastic network interface (ENI) on the vSwitch in a supported zone. The ENI forwards
network traffic between the VPC and 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.
Note Enterprise Edition transit routers are supported in multiple zones within a region.
We recommend that you select multiple zones for your Enterprise Edition transit router
to ensure service high availability.
Step 2: Prepare for the upgrade
Before you perform an upgrade, you must perform the following steps.
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 each zone of
the Enterprise Edition transit router for each VPC that is connected to the Basic Edition transit router. The Enterprise Edition transit router will create an ENI on the vSwitch in each zone. The ENIs forward network traffic
between the VPCs and the Enterprise Edition transit router. Each ENI occupies one
IP address on the vSwitch. Make sure that the vSwitch has sufficient IP addresses.
For more information, see Create a vSwitch.
For example, Alice wants to upgrade a Basic Edition transit router in the China (Hangzhou) region and the Basic Edition transit router is connected to two VPCs named VPC1 and VPC2. Alice specified Zone H and Zone I for
the Enterprise Edition transit router in Step 1. In this case, Alice must make sure that VPC1 has at least one vSwitch in Zone H
and one vSwitch in Zone I, and that VPC2 also has at least one vSwitch in Zone H and
one vSwitch in Zone I.
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 other 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 is connected. 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 and click the CEN instance that you want to manage.
On the Basic Settings > Transit Router tab, find the Basic Edition transit router that you want to manage and click the instance ID.
On the details page of the transit router, click the Route Table tab.
On the Route Table tab, click the icon to download and save the information about the routes in the current region
to your on-premises machine.
Repeat the preceding steps to download and save the information about routes in all
regions of the CEN instance.
Prepare test resources based on your business requirements. After the upgrade is completed,
you can use the test resources to test the network connectivity.
Step 3: Perform the upgrade
After your application for scheduling an upgrade is approved and the preparations
are completed, perform the following steps:
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. Then, click Upgrade Now on the right side of 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
Apply for Zones
The system automatically uses the zones that you specified on the Schedule Upgrade page.
Delete Default Cloud Service
Select Delete Default Cloud Service.
Notes on Creating Service Linked Roles
When you perform the upgrade, the system automatically creates the service-linked
role AliyunServiceRoleForCEN. This service-linked role allows the Enterprise Edition
transit router to create elastic network interfaces (ENIs) on the vSwitches of the
VPC. The ENIs forward network traffic between the VPC and the transit router. For
more information about service-linked roles, see AliyunServiceRoleForCEN.
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 message until the upgrade is completed.
After you complete the preceding steps, you must compare the routes and test 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.