Dell N3200-ON EMC Networking N-Series Switches CLI Reference Guide version 6.6 - Page 1301

• interface interface-id -The local VLAN routing interface over which the IPv6 neighbor can be reached or is auto-detected. Use the vlan keyword and a VLAN ID. Range 1-4093. • autodetect interface interface-id - The VLAN routing interface on which the neighbor's link local IPv6 address is auto detected. Use the vlan keyword and a VLAN ID. Range 1-4093. • hop-count - The maximum hop-count allowed to reach the neighbor. The allowed range is 1-255. Default Configuration The default hop count is 64. Command Mode BGP Router Configuration mode, IPv6 Address Family Configuration mode User Guidelines The ebgp-multihop parameter is relevant only for external BGP neighbors. For internal BGP neighbors, the TTL value remains 64 and can't be modified. A neighbor can inherit this configuration from a peer template. To make the update-source config work for external BGP neighbors, ebgp-multihop hopcount should be configured to a TTL value larger than the default TTL of 1. 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 EMC 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. Layer 3 Routing Commands 1301