Command not in IOS (no ipv6 nd suppress-ra)

Hello INE Team

 

In the workbook vol 1 - question  9.5 - IPv6 Auto-Configuration, the solution says to use the command no ipv6 nd-suppress-ra to allow the router to send RA, this command should be applied under the interface, as the default is suppress RA,  but in IOS - (12.4T) of the Actual LAB we dont have this command available and the RA is sent by default, the oposite of the Workbook, probally this command was used in older IOS version and now has beens changed to  ipv6 nd ra suppress, if you still try the old command (no ipv6 nd suppress-ra) its takes and the running config show applied as the new.

 


R5(config-if)#no ipv6 nd ?

  advertisement-interval  Send an advertisement interval option in RA's

  dad                     Duplicate Address Detection

  managed-config-flag     Hosts should use DHCP for address config

  ns-interval             Set advertised NS retransmission interval

  other-config-flag       Hosts should use DHCP for non-address config

  prefix                  Configure IPv6 Routing Prefix Advertisement

  ra                      Router Advertisement control

  reachable-time          Set advertised reachability time

  router-preference       Set default router preference value



TYPED THE COMMAND AND APPLIED AS NEW FORMAT



R5(config-if)#ipv6 nd suppress-ra

R5(config-if)#do sh run int f0/0

Building configuration...


Current configuration : 390 bytes

!

interface FastEthernet0/0

 ip address 155.30.58.5 255.255.255.0

 ip rip advertise 10

 duplex auto

 speed auto

 ipv6 address FC00:30:0:58::5/64

 ipv6 address FC00:30:0:85::5/64

 ipv6 nd prefix FC00:30:0:58::/64 14400 14400 no-autoconfig

 ipv6 nd prefix FC00:30:0:85::/64 14400 14400

 ipv6 nd advertisement-interval

 ipv6 nd ra suppress

 ipv6 nd ra interval 40

 ipv6 nd ra lifetime 60

end



IOS

3700 Software (C3725-ADVENTERPRISEK9-M), Version 12.4(15)T5


REGARDS

LEANDRO DOMINGUES

 

 

Comments

  • Domingues,

    You are right, since some more recent version RA behavior has changed. Unfortunately, Cisco does that kind of things regularly - e.g. they have changed many QoS commands in features in 12.4T as compared to the previous versions. I believe Cisco just screws everyone looking for backward compatibility :)

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