DELL PC7024 User Manual

Tunnel Interface Commands

PowerConnect 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, PowerConnect 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. PowerConnect 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.

This chapter explains the following commands:

2CSPC4.XCT-SWUM2XX1.book  Page 1261  Monday, October 3, 2011  11:05 AM