Lion + AnyConnect = b0rked IPv6

[Dyonisius (Dick) Visser]

On 2011-08-25 13:04, Dyonisius Visser wrote:
> Hi
>
> I'm having trouble getting AnyConnect to work on MacOS X 10.7.1.
> I've tried the latest version of AnyConnect (3.0.3054), which has some
> Lion-specific fixes. It does 'work' (i.e. installation OK,
> authentication fine, etc), but after that no IPv6 at all any more.
>
> Has anyone managed to get IPv6 to work using Lion and AnyConnect?
>
> At this moment Lion is a no-go since we have a lot of IPv6-only services...

(apologies for HTML)

I took a test machine and did a clean install of Snow Leopard 10.6.8 on
one partition and Lion 10.7.1 on the other partition, then installed
AnyConnect 3.0.3054 on both systems. I then connected to our ASA5505
with both systems and compared the IPv6 routing tables (netstat -rn -f
inet6). They look very similar, with the notable exception of the
default IPv6 route - which is not set in Lion.
This would of course explain the lack of IPv6 connectivity ;-)

Snow Leopard:

Internet6:
Destination                             Gateway                        
Flags         Netif Expire
default                                 2001:610:148:beef::160         
USc           utun0
::1                                     ::1                            
UH              lo0
2001:610:148:beef::160                  link#7                         
UHL             lo0
2001:610:148:beef::/64                  fe80::21f:f3ff:fe36:57cc%utun0 
Uc            utun0
fe80::1%lo0                             link#1                         
UHL             lo0
fe80::21f:5bff:fec3:c51e%en1            0:1f:5b:c3:c5:1e               
UHL             lo0
fe80::21f:f3ff:fe36:57cc%utun0          link#7                         
UHL             lo0
fe80::%utun0/64                         fe80::21f:f3ff:fe36:57cc%utun0 
Uc            utun0
ff01::/32                               ::1                            
Um              lo0
ff02::/32                               ::1                            
UmC             lo0
ff02::/32                               fe80::21f:f3ff:fe36:57cc%utun0 
UmC           utun0
ff02::/32                               link#5                         
UmC             en1


Lion:

Internet6:
Destination                             Gateway                        
Flags         Netif Expire
::1                                     link#1                         
UHL             lo0
2001:610:148:beef::160                  link#7                         
UHL             lo0
2001:610:148:beef::/64                  fe80::21f:f3ff:fe4e:8623%utun0 
Uc            utun0
fe80::1%lo0                             link#1                         
UHLI            lo0
fe80::21f:5bff:fec3:c51e%en1            0:1f:5b:c3:c5:1e               
UHLI            lo0
fe80::21f:f3ff:fe4e:8623%utun0          link#7                         
UHLI            lo0
fe80::%utun0/64                         fe80::21f:f3ff:fe4e:8623%utun0 
UcI           utun0
ff01::%en1/32                           link#5                         
UmCI            en1
ff01::%lo0/32                           fe80::1%lo0                    
UmCI            lo0
ff01::%utun0/32                         fe80::21f:f3ff:fe4e:8623%utun0 
UmCI          utun0
ff02::%en1/32                           link#5                         
UmCI            en1
ff02::%lo0/32                           fe80::1%lo0                    
UmCI            lo0
ff02::%utun0/32                         fe80::21f:f3ff:fe4e:8623%utun0 
UmCI          utun0


After manually adding the same default gateway on Lion:

route add -inet6 default 2001:610:148:beef::160 -ifp utun0

everything starts to work :-)
It's still unclear where the problem is (Lion of AnyConnect).
Let's hope that there is somebody from Cisco and Apple that will liaise
to get this fixed.
From the looks of it, it should not be too hard.


-- 
Dyonisius (Dick) Visser
System & Network Engineer
TERENA Secretariat
Singel 468D, 1017 AW Amsterdam
The Netherlands
T +31 20 530 44 88 F +31 20 530 44 99
visser at terena.org | www.terena.org


-- 

-- 
Dyonisius (Dick) Visser
System & Network Engineer
TERENA Secretariat
Singel 468D, 1017 AW Amsterdam
The Netherlands
T +31 20 530 44 88 F +31 20 530 44 99
visser at terena.org | www.terena.org



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