Chapter 9
| General Security Measures
DHCPv6 Snooping
– 328 –
VLAN according to the default status, or as specifically configured for an
interface with the no ipv6 dhcp snooping trust command.
◆ When an untrusted port is changed to a trusted port, all the dynamic DHCPv6
snooping bindings associated with this port are removed.
◆ Additional considerations when the switch itself is a DHCPv6 client – The port(s)
through which it submits a client request to the DHCPv6 server must be
configured as trusted.
Example
This example sets port 5 to untrusted.
Console(config)#interface ethernet 1/5
Console(config-if)#no ipv6 dhcp snooping trust
Console(config-if)#
Related Commands
ipv6 dhcp snooping (321)
ipv6 dhcp snooping vlan (326)
clear ipv6 dhcp
snooping binding
This command clears DHCPv6 snooping binding table entries from RAM. Use this
command without any optional keywords to clear all entries from the binding
table.
Syntax
clear ipv6 dhcp snooping binding [mac-address ipv6-address]
mac-address - Specifies a MAC address entry. (Format: xx-xx-xx-xx-xx-xx)
ipv6-address - Corresponding IPv6 address. This address must be entered
according to RFC 2373 “IPv6 Addressing Architecture,” using 8 colon-
separated 16-bit hexadecimal values. One double colon may be used in the
address to indicate the appropriate number of zeros required to fill the
undefined fields.
Command Mode
Privileged Exec
Example
Console(config)#clear ipv6 dhcp snooping binding 00-12-cf-01-02-03 2001::1
Console(config)#
To Next Page
Loading...
Need help?
General