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Copy file name to clipboardExpand all lines: pages/interlink/how-to/configure-interlink.mdx
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InterLink is currently in [Public Beta](https://www.scaleway.com/en/betas/).
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</Message>
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Once you have created your InterLink (and in the case of hosted InterLinks, that it has been [provisioned](/interlink/how-to/complete-provisioning/) by your chosen partner), a number of configuration steps become available to you. These steps must be carried out in order for traffic to successfully flow over your InterLink:
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Once you have created your InterLink (and in the case of hosted InterLinks, it has been [provisioned](/interlink/how-to/complete-provisioning/) by your chosen partner), a number of configuration steps become available to you. These steps must be carried out in order for traffic to successfully flow over your InterLink:
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- Attach a VPC
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- Create and attach routing policies
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- A Scaleway account logged into the [console](https://console.scaleway.com)
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-[Owner](/iam/concepts/#owner) status or [IAM permissions](/iam/concepts/#permission) allowing you to perform actions in the intended Organization
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-[Ordered an InterLink](/interlink/how-to/order-interlink/) whichhas been [provisioned](/interlink/how-to/complete-provisioning/) by the partner
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-[Ordered an InterLink](/interlink/how-to/order-interlink/)(which, if self-hosted, has been [provisioned](/interlink/how-to/complete-provisioning/) by the partner)
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## How to attach a VPC
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-**VLAN ID** for the InterLink
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You also need to set up route announcements and filters on the customer side. For this, you will need the following information, also available from the InterLink's **Overview** screen.
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Et j'av
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-**BGP interconnection subnet(s)**: The private subnet used for the VPC and external infrastructure to establish a BGP session and exchange routing information. For InterLinks that have both IPv4 and IPv6 routing policies, one IPv4 and one IPv6 subnet will be provided.
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-**Routing policy**: Take into account the routing policy(ies) you attached to the connection, when configuring routing policy on the customer gateway device.
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## How to activate route propagation
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Once you have attached a VPC, attached routing policies and (for self-hosted InterLinks) set up your network device, you can activate route propagation. This is the final step in configuring your InterLink so that traffic can flow between the VPC and your external infrastructure: it triggers the dynamic exchange of route information between the VPC and external infrastructure.
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Activating route propagation is the final step in configuring your InterLink so that traffic can flow between the VPC and your external infrastructure: it triggers the dynamic exchange of route information between the VPC and external infrastructure.
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1. Click **InterLink** in the **Network** section of the [Scaleway console](https://console.scaleway.com) side menu. A listing of your InterLinks displays.
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2. Click on the InterLink that you want to configure. The InterLink's **Overview** page displays.
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3. In the **Route propagation** section, click **Activate propagation**.
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A pop-up displays, confirming that the action will launch the BGP session(s) and allow traffic to flow over the InterLink, via the routes whitelisted in the attached routing policy(ies).
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A pop-up displays, confirming that the action will launch the BGP session(s), allowing traffic to flow over the InterLink via the routes whitelisted in the attached routing policy(ies).
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4. Click **Activate route propagation**.
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Route propagation is activated, and you are returned to your InterLink's overview page.
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Route propagation is activated. You are returned to your InterLink's overview page.
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While route propagation remains active, traffic can flow across the InterLink along the routes allowed by the routing policy(ies). The VPC and external infrastructure will dynamically exchange and update route information. You can deactivate route propagation at any time: if you do so, all routes are blocked and no traffic can flow.
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While route propagation remains active, the VPC and external infrastructure will dynamically exchange and update route information. Traffic can flow across the InterLink along the routes whitelisted in the routing policy(ies). You can deactivate route propagation at any time: if you do so, all routes are blocked and no traffic can flow.
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## How to modify your InterLink configuration
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It is not possible to modify settings that were defined at the time of creating the InterLink, such as its region, partner, dedicated connection, location, or bandwidth. To modify any of those settings, you must delete the InterLink and create a new one.
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### How to change the attached VPC
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### How to detach or change the attached VPC
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1. Click **InterLink** in the **Network** section of the [Scaleway console](https://console.scaleway.com) side menu. A listing of your InterLinks displays.
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2. Click on the InterLink that you want to configure. The InterLink's **Overview** page displays.
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3. In the **Attached VPC** section, click the unlink icon <Iconname="unlink" /> next to the VPC you want to detach.
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3. In the **Attached VPC** section, click the unlink icon <Iconname="unlink" /> next to the VPC to detach.
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A pop-up displays, confirming that this action will detach the VPC, and the InterLink will not be connected to any Scaleway resources until you reattach a VPC.
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The VPC is detached, and you are returned to the InterLink's **Overview** page. No traffic can currently flow over the InterLink, and all associated routes are removed from the VPC's route table.
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Follow the next steps to attach another VPC.
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5. In the **Attached VPC** section, click **Attach VPC**. A pop-up displays:
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<Lightboximage={image7}alt="A screen in the Scaleway console invites the user to attach a VPC to complete the connection from their external infrastructure, across the InterLink to their Scaleway resources. A dropdown menu allows a VPC to be selected. A banner reminds users to check any attached routing policies for compatibility with the selected VPC." />
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6. Select one of your existing VPCs from the dropdown list. It must be in the same region as the InterLink. Alternatively, click **+ Create VPC** to create and attach a new VPC.
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<Messagetype="tip">
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Ensure that the routing policy(ies) attached to the InterLink is suitable for the VPC you are attaching. Remember that the outgoing routes in the policy should correspond to the route announcements to whitelist from the VPC itself.
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</Message>
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7. Click **Attach VPC**.
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The VPC is attached and you are returned to the InterLink's **Overview** page. Remember to check the routing policy and activate route propagation so that traffic can flow across the InterLink.
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If you want to attach a new VPC, follow the [normal process](#how-to-attach-a-vpc) for doing so. Remember to check that the InterLink's routing policies are appropriate for the new VPC.
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### How to replace or detach an attached routing policy
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The policy is detached or replaced, and you are returned to your InterLink's Overview page.
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### How to edit an existing routing policy
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1. Click **InterLink** in the **Network** section of the [Scaleway console](https://console.scaleway.com) side menu. A listing of your InterLinks displays.
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2. Click on the InterLink that you want to configure. The InterLink's **Overview** page displays.
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3. In the **Route propagation** section, click the three dot icon <Iconname="more" /> next to the routing policy. Then click **Edit policy** in the menu that displays.
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<Messagetype="tip">
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You can also edit routing policies from their dedicated tab in the console, including policies that aren't currently attached to an InterLink.
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</Message>
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The **Edit routing policy** wizard displays. See the dedicated documentation on [creating and attaching a routing policy](/interlink/how-to/create-routing-policy/) for help with routing policies.
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4. Make the required edits, and click **Edit routing policy**
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A warning displays, to remind you that modifications will immediately be propagated on InterLinks using this policy.
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5. Click **Save**.
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The policy is modified and modifications are immediately applied.
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### How to deactivate route propagation
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1. Click **InterLink** in the **Network** section of the [Scaleway console](https://console.scaleway.com) side menu. A listing of your InterLinks displays.
Copy file name to clipboardExpand all lines: pages/interlink/how-to/create-routing-policy.mdx
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title: How to create a routing policy
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title: How to create and manage routing policies
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description: Find out how to create a routing policy for your Scaleway InterLink. Whitelist incoming and outgoing route announcements, so that traffic can flow securely over your InterLink.
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dates:
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validation: 2027-07-09
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<Messagetype="tip">
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See our dedicated documentation on using [BGP communities](/interlink/reference-content/bgp-communities/) to influence route priority for InterLink traffic.
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</Message>
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</Message>
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### How to edit an existing routing policy
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1. Click **InterLink** in the **Network** section of the [Scaleway console](https://console.scaleway.com) side menu. A listing of your InterLinks displays.
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2. Click on the **Routing Policy** tab. A list of your routing policies displays.
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3. Click <Iconname="more" /> next to the routing policy to edit, and select **Edit** in the menu that displays.
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4. The **Edit routing policy** wizard displays. See the dedicated documentation on [creating and attaching a routing policy](/interlink/how-to/create-routing-policy/) for help with routing policies.
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5. Make the required edits, and click **Edit routing policy**
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A warning displays, to remind you that modifications will immediately be propagated on InterLinks using this policy.
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5. Click **Save**.
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The policy is modified and modifications are immediately applied.
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