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    Changing Tunnel Route

    Last updated: 2024-01-13 16:40:45
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      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.

      Prerequisites

      You have owned a tunnel before you can 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 To ensure the refined scheduling capability of your network, do not publish the following routes: 9.0.0.0/8, 10.0.0.0/8, 11.0.0.0/8, 30.0.0.0/8, 100.64.0.0/10, 131.87.0.0/16, 172.16.0.0/12, and 192.168.0.0/16.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

      Note:
      This document takes an exclusive dedicated tunnel as an example. The method also applies to a shared dedicated tunnel.
      1. Log in to the Direct Connect console and click Exclusive virtual interface in the left sidebar.
      2. On the Exclusive virtual interface page, find the dedicated tunnel to be modified, and click Change tunnel in 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.
      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
      3.1 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.</td>
      BGP: modify BGP ASN or BGP key.
      Field
      Description
      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 +.
      3.2 Change health checks. For more information, see Dedicated tunnel health check.
      3.3 Click Confirm. The new tunnel configuration will take effect in several minutes depending on the network.
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