IPV6 isatap

[Keith Clayton]

I am trying to get ISATAP config working, The client does not receive a receive global unicast address any ideas ?

[Nagendra Kumar Nainar]

Hi Keith,

On ISATAP side, Router Advertisement (RA) is disabled and so no RA messages sent.

Can you try enabling "no ipv6 nd ra suppress" under tunnel 1 on ISATAP side?. That should fix the issue.

HTH,

Nagendra

[Keith Clayton]

Hi  naikumar,

it still not working

ISATAPRouter#sh run

Building configuration...

Current configuration : 844 bytes

!

version 12.4

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname ISATAPRouter

!

boot-start-marker

boot-end-marker

!

!

no aaa new-model

memory-size iomem 5

!

!

ip cef

no ip domain lookup

!

!

ipv6 unicast-routing

!

!

!

interface Loopback1

ip address 1.1.1.1 255.255.255.255

!

interface Tunnel1

no ip address

no ip redirects

ipv6 address 2001::/64 eui-64

tunnel source Loopback1

tunnel mode ipv6ip isatap

!

interface FastEthernet0/0

ip address 192.168.12.1 255.255.255.0

duplex auto

speed auto

!

router ospf 1

log-adjacency-changes

network 0.0.0.0 255.255.255.255 area 0

!

ip http server

no ip http secure-server

!

!

line con 0

logging synchronous

line aux 0

line vty 0 4

login

!

!

end

ISATAPRouter#

ISATAPClient#sh run

Building configuration...

Current configuration : 780 bytes

!

version 12.4

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname ISATAPClient

!

boot-start-marker

boot-end-marker

!

!

no aaa new-model

memory-size iomem 5

!

!

ip cef

no ip domain lookup

!

interface Tunnel1

no ip address

ipv6 address autoconfig

ipv6 enable

tunnel source 192.168.23.3

tunnel destination 1.1.1.1

!

interface FastEthernet0/0

ip address 192.168.23.3 255.255.255.0

duplex auto

speed auto

!

router ospf 1

log-adjacency-changes

network 0.0.0.0 255.255.255.255 area 0

!

no ip http server

no ip http secure-server

!

!

line con 0

exec-timeout 0 0

logging synchronous

line aux 0

line vty 0 4

login

!

!

end

ISATAPClient#

[Nagendra Kumar Nainar]

Keith,

Still it appears that the RA is disabled under tunnel interfcae on ISATAP side. Can you try "show ipv6 interface tunnel 1" on ISATAPRouter side and see if you see any "Router Advertisement" related output?.

You need to use "no ipv6 nd ra suppress" or "no ipv6 nd ra-suppress" (Depends on IOS version) to get RA enabled. RA is the message used to advertise the prefix to be used for autconfig.

HTH,

Nagendra

[Keith Clayton]

Added in the no ipv6 nd ra suppress command on the ISATAPRouter, still did not work

Change  the mode on the tunnel interface on ISAclient to ipv6ip from gre ip, I  had to shutdown the tunnel interface and bring it back before I received  the global unicast address

[Phillip Remaker]

So, is everything working correctly now?  Just checking!

[Keith Clayton]

Yes thanks all working

[rael]

Hi

I had the same problem.

But then i removed the tunnel mode of the tunnel interface, and reapplied it. Did a shutdown of the interface defined as the source of my tunnel interface(fa4), and ipconfig /release & /renew on my windows client, and ISATAP is working again.

Here is my tunnel configuration:

interface Tunnel10

description

no ip address

no ip redirects

ipv6 address 2001:XXXX:XXXX:9999::/64 eui-64

no ipv6 nd ra suppress

tunnel source FastEthernet4

tunnel mode ipv6ip isatap

end

[iacobansilviu1]

Hello,

I have the same problem. RA's are not disabled on the router (including the periodic ones) but the router still not sending the RAs (checked with wireshark). Any reason why this is hapenning or a possible solution? Thank you