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src/content/partials/networking-services/reference/traffic-steering.mdx

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@@ -249,13 +249,11 @@ E[Anycast IP] --> G[/"GRE Tunnel 2 / <br> priority 1 / <br> ~50% of flows"/] -->
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E[Anycast IP] --> H[/GRE Tunnel 3 / <br> priority 2 / <br> 0% of flows/] --o K{{Customer <br> data center/ <br> network 3}}
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```
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<br />
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When {props.productName} health checks determine that Tunnel 2 is unhealthy, that route is dynamically de-prioritized, leaving Tunnel 1 with the sole top-priority route. As a result, traffic is steered away from Tunnel 2, and all traffic flows to Tunnel 1.
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#### Failover traffic flow: Scenario 1
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Customer router failure
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**Customer router failure**
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When {props.productName} health checks determine that Tunnel 2 is unhealthy, that route is dynamically de-prioritized, leaving Tunnel 1 with the sole top-priority route. As a result, traffic is steered away from Tunnel 2, and all traffic flows to Tunnel 1.
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```mermaid
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flowchart LR
@@ -278,13 +276,11 @@ classDef red fill:#EE4B2B,color: black
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classDef green fill:#00FF00,color: black
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```
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<br />
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When {props.productName} determines that Tunnel 1 is unhealthy as well, that route is also de-prioritized, leaving Tunnel 3 with the top priority route. In that case, all traffic flows to Tunnel 3.
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#### Failover traffic flow: Scenario 2
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Intermediary ISP failure
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**Intermediary ISP failure**
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When {props.productName} determines that Tunnel 1 is unhealthy as well, that route is also de-prioritized, leaving Tunnel 3 with the top priority route. In that case, all traffic flows to Tunnel 3.
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```mermaid
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flowchart LR
@@ -307,8 +303,6 @@ classDef red fill:#EE4B2B,color: black
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classDef green fill:#00FF00,color: black
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```
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When {props.productName} determines that Tunnels 1 and 2 are healthy again, it re-prioritizes those routes, and traffic flow returns to normal.
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### ECMP and bandwidth utilization
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## BGP information
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When using a Direct CNI connection as an on-ramp, {props.productName} customers can also use BGP peering between their networks and their Magic routing table.
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When using a [Direct CNI](/network-interconnect/express-cni/) connection as an on-ramp, {props.productName} customers can also use BGP peering between their networks and their Magic routing table.
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Using BGP peering with a CNI allows customers to:
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@@ -379,7 +373,7 @@ BGP support currently has the following limitations:
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- The Cloudflare account ASN and the customer device ASN must be different. Only eBGP is supported.
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- Routes are always injected with a priority of `100`.
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- Bidirectional Forwarding Detection (BFD) is not supported.
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- BGP supports only IPv4 routes.
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- Only IPv4 routes are supported.
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{ props.magicWord === "Magic Transit" && (
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<>

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