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suppress-host-routes-from-dci-to-dc

date_range 14-May-24
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Syntax

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suppress-host-routes-from-dci-to-dc

Hierarchy Level

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[edit routing-instances routing-instance-name protocols evpn interconnect]

Description

You can suppress Ethernet VPN (EVPN) Type 5 host route advertisements re-originated across the data center interconnect (DCI), to the local data center (DC). Setting this statement achieves better scaling and performance on leaf devices by preventing host route advertisements for non-existing subnets on the local DC. Host routes corresponding to existing subnets stretched from the DCI gateway (GW) to the local DC will be advertised.

The DCI GW device treats the following Type 5 routes as host routes:

  • IPv4 routes with a /32 prefix

  • IPv6 routes with a /128 prefix

The DCI GW will continue to advertise non-host Type 5 routes to the DC by default.

Consider the following points before deploying this configuration:

  • You configure this option on the DCI GW devices.

  • You must configure integrated routing and bridging (IRB) interfaceds on DCI GW devices in edge-routed bridging (ERB) mode.

  • Setting this option applies to every DCI-learned host route, and could suppress necessary route advertisements. You can selectively suppress Type 5 route advertisements with an export policy at the [edit routing-instances routing-instance-name protocols evpn ip-prefix-routes] hierarchy, instead of using this option. Setting this option doesn't affect locally learned host route advertisements.

  • Setting this option doesn't affect IRB's configured with the disable statement. IRB's associated both with a Layer 3 context and EVPN bridge domain are still validated when a subnet is stretched from DCI GW to DC.

Required Privilege Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 24.2R1.

Statement introduced in Junos OS Evolved Release 24.2R1.

Related Documentation

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