для Cisco Cisco IOS Software Release 12.0(13)S7

This section contains the following configuration examples for Unicast RPF for IPv6:

The following example shows how to configure the Unicast RPF for IPv6 feature in strict checking mode 
on an input 10G SIP Gigabit Ethernet interface in a Cisco 12000 series Internet router:

Router# configure terminal

Router(config)# interface gigabitethernet 3/1/1

Router(config-if)# ipv6 verify unicast source reachable-via rx

The next example also shows how to configure the Unicast RPF for IPv6 feature in strict checking mode 
on the same input interface in a Cisco 12000 series Internet router using the ipv6 verify unicast 
reverse-path command:

Router# configure terminal

Router(config)# interface gigabitethernet 3/1/1

Router(config-if)# ipv6 verify unicast reverse-path

To verify that Unicast RPF for IPv6 is operational, use the show cef interface type slot/subslot/port 
internal command in privileged EXEC mode.

As shown in the following example, Unicast RPF for IPv6 is enabled if the line starting with IPv6 unicast 
RPF appears. If this line is not displayed, the Unicast RPF feature is not enabled. The numbers following 
drop= and sdrop= show the number of IPv6 packets dropped by Unicast RPF.

Router# show cef interface pos 2/0/1 internal

POS2/1 is up (if_number 6)

  Corresponding hwidb fast_if_number 6

  Corresponding hwidb firstsw->if_number 6

  Internet Protocol processing disabled

  Interface is marked as point to point interface

  Interface generates an auto-adjacency

  Hardware idb is POS2/0/1 (6)

  Software idb is POS2/0/1 (6)

  Fast switching type 4, interface type 11

  IP Distributed CEF switching enabled

  IP Null turbo vector

  Input fast flags 0x0, Output fast flags 0x0, Flags 0x80041

  ifindex 5(5)

  Slot 2 Slot unit 1 VC -1

  Transmit limit accumulator 0x0 (0x0)

  IP MTU 4470

 Subblocks:

  IPv6 unicast RPF: acl=None, drop=0, sdrop=0 

  IPv6: enabled 1 unreachable FALSE redirect TRUE mtu 4470 flags 0x0

        link-local address is FE80::204:6DFF:FE9A:CFFF

        Global unicast address(es):

        BBBB::1, subnet is BBBB::/64

        Input features: RPF