IP Configuration
IPv6 Management and Interfaces
Cisco 500 Series Stackable Managed Switch Administration Guide Release 1.3 328
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- Prefix Address—The IPv6 network. This argument must be in the form 
documented in RFC 4293 where the address is specified in 
hexadecimal—using 16-bit values between colons.
- Prefix-Length—The length of the IPv6 prefix. A decimal value that 
indicates how many of the high-order contiguous bits of the address 
comprise the prefix (the network portion of the address). A slash mark 
must precede the decimal value
• Prefix Advertisement—Select to advertise this prefix. 
• Valid Lifetime—Remaining length of time, in seconds, that this prefix will 
continue to be valid, i.e., time until invalidation. The address generated from 
an invalidated prefix should not appear as the destination or source address 
of a packet.
- Infinite—Select this value to set the field to 4,294,967,295, which 
represents infinity.
- User Defined—Enter a value.
• Preferred Lifetime—The remaining length of time, in seconds, that this 
prefix will continue to be preferred. After this time has passed, the prefix 
should no longer be used as a source address in new communications, but 
packets received on such an interface are processed as expected. The 
preferred-lifetime must not be larger than the valid-lifetime.
- Infinite—Select this value to set the field to 4,294,967,295, which 
represents infinity.
- User Defined—Enter a value.
• Auto Configuration—Enable automatic configuration of IPv6 addresses 
using stateless auto configuration on an interface and enable IPv6 
processing on the interface. Addresses are configured depending on the 
prefixes received in Router Advertisement messages
• Prefix Status—Select one of the following options:
- Onlink—Configures the specified prefix as on-link. Nodes sending traffic 
to addresses that contain the specified prefix consider the destination to 
be locally reachable on the link. An onlink prefix is inserted into the routing 
table as a connected prefix (L-bit set).
- No Onlink—Configures the specified prefix as not onlink. A no onlink 
prefix is inserted into the routing table as a connected prefix but 
advertised with a L-bit clear.