This is retired content. This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist.
A version of this page is also available for

The following list shows the IPv6 interface attributes that you can configure:

  • Specify whether an interface forwards packets whose destination address is not assigned to the interface.

  • Specify whether an interface is advertising, in which case it sends router advertisements.

  • Specify whether an interface sends router solicitations and receives router advertisements, or whether it receives router solicitations and sends router advertisements.

  • Set the MTU for the interface. The new MTU must be less than or equal to the link's maximum (true) MTU (as specified by the ipv6 ifcommand), and greater than or equal to the minimum IPv6 MTU (1280 bytes).

  • Change the site-identifier for an interface. Site identifiers are used in the sin6_scope_id field for site-local addresses.

To configure interface attributes, perform the following steps:

  1. At a command prompt, type ipv6 ifc IfIndex {[forwards] | [-forwards]} {[advertises] | [-advertises]} [mtu #Bytes] [site SiteIdentifier], where:

    IfIndexspecifies the interface name.

    {[forwards] | [-forwards]}specifies whether packets arriving on this interface can be forwarded to other interfaces. The default is -forwards.

    {[advertises] | [-advertises]}specifies whether Router Advertisements are sent on this interface. The default is -advertises.

    [mtu #Bytes]specifies the maximum transmission unit (MTU) of this interface. If mtu is not specified, the default MTU of the link is used.

    [site SiteIdentifier]specifies the site scope zone identifier. The site identifier is used to distinguish among interfaces belonging to different administrative regions that use site-local addressing.

  2. Press ENTER.

See Also


Assigning an IPv6 Address to a Device

Other Resources