allowas-in (bgp-neightbor-config)

Enables re-advertisement of all prefixes containing duplicate ASNs. Use this command to configure the maximum number of times an ASN is advertised. This option is disabled by default.

When enabled, PE (Provider Edge) routers can re-advertise all prefixes containing duplicate ASNs. This creates a pair of VRF (VPN Routing/Forwarding) instances on each PE router to receive and re-advertise prefixes. The PE router receives prefixes with ASNs from all PE routers and advertises to its neighbor PE routers on one VRF. The other VRF receives prefixes with ASNs from the CE (Customer Edge) routers and re-advertises them to all PE routers in the configuration.

Supported in the following platforms:

Syntax

allowas-in <1-10>

Parameters

allowas-in <1-10>
allowas-in <1-10> Enables and configures the maximum number of times an ASN is advertised.
  • <1-10> – Specify a value from 1 - 10.

Examples

nx9500-6C8809(config-profile testNX9000-router-bgp-neighbor-192.168.13.99)#allowas-in 10
nx9500-6C8809(config-profile testNX9000-router-bgp-neighbor-192.168.13.99)#show context
  bgp neighbor 192.168.13.99
   advertisement-interval 100
   allowas-in 10
nx9500-6C8809(config-profile testNX9000-router-bgp-neighbor-192.168.13.99)#

Related Commands

no (bgp-neighbor-config)

Disables re-advertisement of all prefixes containing duplicate ASNs.
9037762-04 Rev AB