Dell N3200-ON EMC Networking N-Series Switches CLI Reference Guide version 6.7 - Page 1343

• ip-address - The neighbor's IPv4 address. • ipv6-address [ interface interface-id] - The neighbor's IPv6 address. If the neighbor's IPv6 address is a link local address, the local interface must also be specified. • autodetect interface interface-id - The VLAN routing interface on which the neighbor's link local IPv6 address is auto detected. • local-as as-number - The AS number to advertise as the local AS in the AS PATH sent to the neighbor. The as-number is the router's autonomous system number in asplain format. Dell EMC Networking BGP supports four byte AS numbers, in the range of 0-429496729. • no-prepend - The local-as is not prepended in the AS PATH received in the updates from this neighbor. • replace-as - Replace the router's own AS with the local-as in the AS PATH sent to the neighbor. Default Configuration No local-as is configured for any peer. Command Mode BGP Router Configuration mode, IPv4 Address Family Configuration mode User Guidelines In typical data center deployments using CLOS networks, the peering is all external BGP between the BGP devices requiring an unique ASN for each router. Normally, the private BGP networks are expected to use private AS numbers. But, there are only 1024 private AS numbers in the standard 2-byte ASN. Due to this limitation, data center deployments are forced to use public ASNs in their private networks. When such private networks are interconnected to each other, there needs to be a way to manipulate the public ASNs in the route advertisements so that the private networks with the public ASNs don't experience ASN conflicts. With the options no-prepend and replace-as Layer 3 Routing Commands 1343