Chapter 30
| IP Interface Commands
IPv6 Interface
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◆ The ipv6 nd other-config-flag command is used to tell hosts that they should
use stateless address autoconfiguration to get IPv6 address (based on the IPv6
prefixes found in router advertisements) and stateful autoconfiguration to get
other non-address parameters (such as DNS server addresses) from DHCPv6
servers.
◆ The absence of the “managed-address configuration” flag tells hosts to use only
stateless address autoconfiguration (based on IPv6 prefixes found in router
advertisements).
◆ The “managed address configuration” flag is only a suggestion to attached
hosts. They may still use stateful and/or stateless address autoconfiguration. If
hosts must be forced to use DHCPv6 for security reasons, ensure that no route
prefixes are sent in router advertisements.
Example
The following tells hosts to use stateful autoconfiguration to obtain addresses:
Console(config)#interface vlan 1
Console(config)#ipv6 nd managed-config-flag
Console(config)#
ipv6 nd
other-config-flag
This command configures IPv6 router advertisements to indicate to attached hosts
that they can obtain stateful autoconfiguration information other than addresses.
Use the no form to clear this flag from router advertisements.
SYNTAX
[no] ipv6 nd other-config-flag
Default Setting
Disabled
Command Mode
Interface Configuration (VLAN)
Command Usage
◆ The “other-stateful-configuration” flag tells hosts that they should use stateful
autoconfiguration to obtain information other than addresses from a DHCPv6
server.
◆ Some hosts interpret the “other stateful configuration” flag to indicate that they
should use stateless address autoconfiguration to get IPv6 address (based on
the IPv6 prefixes found in router advertisements) and stateful
autoconfiguration to get other non-address parameters from DHCPv6 servers.
In this case, the absence of both the “managed address configuration” flag and
the “other stateful configuration” flag is interpreted to mean that they should
use only stateless autoconfiguration to obtain addresses.
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