tencent cloud

You can modify configurations including bandwidth of a connected dedicated tunnel in the Direct Connect console. This document describes how to modify configurations and routing methods of a 1.0 or 2.0 tunnel in the console.

Note：

For a shared connection, only the connection owner can modify the bandwidth of a dedicated tunnel.

Prerequisite

You have owned a tunnel before you modify it.

Use Limits on Large IP Ranges

The direct connect gateway will directly reject a large CPE IP range. To ensure the refined scheduling capability of your network, do not publish the following routes:
9.0.0.0/8, 10.0.0.0/8, 11.0.0.0/8, 30.0.0.0/8, 100.64.0.0/10, 131.87.0.0/16, 172.16.0.0/12, and 192.168.0.0/16.
You can split the above routes as follows for publishing:

• 9.0.0.0/8
  Split into 9.0.0.0/9 + 9.128.0.0/9.
• 10.0.0.0/8
  Split into 10.0.0.0/9 + 10.128.0.0/9.
• 11.0.0.0/8
  Split into 11.0.0.0/9 + 11.128.0.0/9.
• 30.0.0.0/8
  Split into 30.0.0.0/9 + 30.128.0.0/9.
• 100.64.0.0/10
  Split into 100.64.0.0/11 + 100.96.0.0/11.
• 131.87.0.0/16
  Split into 131.87.0.0/17 + 131.87.128.0/17.
• 172.16.0.0/12
  Split into 172.16.0.0/13 + 172.24.0.0/13.
• 192.168.0.0/16
  Split into 192.168.0.0/17 + 192.168.128.0/17.

Changing Tunnel Route

1. Log in to the Direct Connect console and click *Dedicated Tunnels** on the left sidebar to access the Dedicated Tunnels page.
2. Locate the dedicated tunnel to be modified, and click More > Change Tunnel under the Operation column.
   
3. Choose the operation depending on the dedicated tunnel type, which can be checked on the Basic Information page.

• Dedicated Tunnel 1.0
  Edit the following configurations in the pop-up dialog box, and click OK.
  

  Field	Description
  Bandwidth Cap	Specify the bandwidth cap of the dedicated tunnel, which cannot exceed the maximum bandwidth of the associated connection. If the billing mode is pay-as-you-go by monthly 95th percentile, this parameter does not mean the billable bandwidth. This feature is in canary release. To try it out, please submit a ticket.
  Tencent Cloud Primary Edge IP	Enter the connection IP address on the Tencent Cloud side. Please note that changing the IP address will interrupt the service.
  CPE Peer IP	Configure the connection IP address on the user (or carrier) side. Please note that changing the IP address will interrupt the service.
  CPE IP Range	Modify the CPE IP range. To ensure the refined scheduling capability of your network, follow the Use Limits on Large IP Range.
  BGP ASN	Enter the BGP neighbor ASN on the CPE side. Note that 45090 is Tencent Cloud ASN. If this field is left empty, a random ASN will be assigned.
  BGP Key	Enter the MD5 value of the BGP neighbor, which defaults to "tencent". If it is left empty, no BGP key is required. It cannot contain 6 special characters including ?, &, space, ", \, and +.

• Dedicated Tunnel 2.0
  Modify the information as needed in the Advanced Configuration tab.
  • Modifying tunnel configuration
    Click Edit on the right to modify Tencent Cloud IP, CPE peer IP, VLAN ID and Jumbo frames, and then click Save.

    Note：

    Frame, consisting of many bytes, is a protocol data unit of the data linkage layer. Ethernet frames generally have 1,500 bytes. The actual transfer frame size is usually determined by the MTU of the device, that is, the maximum number of bytes that the device can transfer at a time. Jumbo frames, also called giant frames, are larger than standard Ethernet frames in size.

    Field	Description
    Tencent Cloud Edge IP	Enter the connection IP address on the Tencent Cloud side. Please note that changing the IP address will interrupt the service.
    CPE Peer IP	Configure the connection IP address on the user (or carrier) side. Please note that changing the IP address will interrupt the service.
    VLAN ID	A VLAN corresponds to a tunnel. Enter a value within the range of 0-3000. Entering “0” means one dedicated tunnel can be created. If MSTP connection passes through to multiple VLANs, the carrier needs to enable the Trunk mode.
    Jumbo frames	Jumbo frames are larger Ethernet frames and supported by dedicated tunnel 2.0. The feature of Jumbo frames is not enabled by default. In this case, the MTU includes 1,464 bytes. When this feature is enabled, the MTU can contain 9,001 bytes. To enable this feature, please submit a ticket.

  • Editing the routing mode
  1. Click Edit on the right of the Routing Mode to modify the route.
     • Static: modify the CPE IP range. To ensure the refined scheduling capability of your network, follow the Use Limits on Large IP Range.
       
     • BGP: modify BGP ASN or BGP key.
       

       Field	Description
       BGP ASN	Enter the BGP neighbor AS number on the CPE side. Note that 45090 is Tencent Cloud ASN. If this field is left empty, a random ASN will be assigned.
       BGP Key	Enter the MD5 value of the BGP neighbor, which defaults to "tencent". If it is left empty, no BGP key is required. It cannot contain 6 special characters such as ?, &, space, ", \, and +.

  2. Change health checks.
     For details, please see Dedicated Tunnel Health Check.
  3. Click OK.
     The new tunnel configuration will take effect in several minutes depending on the network.