Administrator Guide

Layer 3 Routing Commands 1820
Tunnel Interface Commands
Dell EMC Networking N3000/N3100/N4000 Series Switches
Dell EMC Networking provides for the creation, deletion, and management
of tunnel interfaces. They are dynamic interfaces that are created and deleted
by user configuration.
Tunnel interfaces are used for the following purposes.
• IPv4 tunnels
• IPv6 tunnels
Each router interface (port or VLAN interface) may have associated tunnel
interfaces. Each interface can have multiple tunnel interfaces. There is no set
limit to the number of tunnel interfaces associated with a router interface.
There is a compile platform limitation to the number of tunnel interfaces
available to the entire system.
To support IPv4 to IPv6 transition, Dell EMC Networking supports
configured tunnels (RFC 4213) and automatic 6to4 tunnels (RFC 3056).
6to4 tunnels are automatically formed for IPv4 tunnels carrying IPv6 traffic.
The automatic tunnels IPv4 destination address is derived from the 6to4 IPv6
address of the tunnel’s next hop. Dell EMC Networking can act as a 6to4
border router that connects a 6to4 site to a 6to4 domain. The border router
sends and receives tunneled traffic from routers in the 6to4 domain that
include other 6to4 border routers and 6to4 relay routers.
Commands in this Section
This section explains the following commands:
interface tunnel
Use the interface tunnel command in Global Configuration mode to enter
the interface configuration mode for a tunnel.
interface tunnel tunnel mode ipv6ip
show interfaces tunnel tunnel source
tunnel destination
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