Dell N3200-ON Networking N-Series Switches CLI Reference Guide version 6.8.0 - Page 1359

Autodetect Interface When BGP is deployed in an IPv6 data center network, it is desirable to use IPv6 link local addresses as BGP neighbors. Using link local addresses avoids the need to assign and manage global IPv6 addresses on interconnect links. Dell Networking already supports BGP neighbors with link local IPv6 addresses, but it requires that the link local IPv6 address of the neighbor be configured using the BGP "neighbor" command. Since the link local address is derived from the switch MAC address, the network administrator needs to know the MAC address of all the switches deployed in the network, and if one switch fails and is replaced with a different switch then all the BGP neighbor switches need to be reconfigured to change the link local address specified in their neighbor commands. The IPv6 Link Local Address Auto Detect feature eliminates the need for the network administrator to configure the link local IPv6 address of every neighbor. Instead of specifying the link local IPv6 address, the network administrator can use a special keyword "autodetect" to refer to the link local IPv6 address of the neighbor. For example: "neighbor autodetect interface 0/21 remote-as 10000" There are several restrictions to this feature: 1 The "interface" can only refer to non-multiple access VLAN routing interfaces. It does not work on tunnels. 2 Only one "autodetect" neighbor can be configured per interface. 3 If autodetect neighbor is configured on an interface, a link-local IPv6 neighbor cannot be configured on the same interface. 4 If more than one link local IPv6 address is detected on the specified interface, this is considered to be an error and the address auto-detection fails. 5 The feature is supported only on platforms that also support the RFC 5549. 6 The feature is applicable only for directly connected neighbors. 7 Multiple access VLANs are not supported. Command History Introduced in version 6.3.0.1 firmware. Command mode updated in version 6.8 firmware. Layer 3 Routing Commands 1359