IPv6 question

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Operating Systems Solaris IPv6 question
# 1  
IPv6 question

I am currently trying to setup static ipv6 address with a persistent default gateway. This is on a Solaris 10 non global zone running inside a Solaris 10 global zone. My production server I am comparing against is a Solaris 10 xen instance running on a Oracle Solaris xen instance.

I have got it working but not as intended. I am dont understand why when i plumb the interface and it comes online with the assigned ip that it also created another 2 interfaces igb1:2 and igb1:3. Why does this happen?

I thought that was the job of ndp to stop auto configuration. My /etc/inet/ndpd.conf file with 644 perms.
ifdefault StatelessAddrConf false
ifdefault StatefulAddrConf false

Here are the steps I have performed in the following order.

1. created ndpd.conf file with above configuration.
2. Enabled ndp "svcadm enable ndp"
3. vi /etc/hostname6.igb1 to include the below config
addif x:y:z:1001::41/64 up
4. ifconfig igb1 inet6 plumb
5. ifconfig igb1:1 inet6 plumb
6. ifconfig igb1:1 inet6 x:y:z:1001::40/64 up

below is my ifconfig output
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
 inet netmask ff000000 
igb1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
 inet x.y.z.41 netmask ffffff00 broadcast x.y.z.255
 ether 0:21:28:75:dc:1 
lo0: flags=2002000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv6,VIRTUAL> mtu 8252 index 1
 inet6 ::1/128 
igb1: flags=2000841<UP,RUNNING,MULTICAST,IPv6> mtu 1500 index 2
 inet6 fe80::221:28ff:fe75:dc01/10 
 ether 0:21:28:75:dc:1 
igb1:1: flags=2000841<UP,RUNNING,MULTICAST,IPv6> mtu 1500 index 2
 inet6 x:y:z:1001::41/64 
igb1:2: flags=20a0841<UP,RUNNING,MULTICAST,NOLOCAL,ADDRCONF,IPv6> mtu 1500 index 2
 inet6 subnet x:y:z:1001::/64 
igb1:3: flags=20a0841<UP,RUNNING,MULTICAST,NOLOCAL,ADDRCONF,IPv6> mtu 1500 index 2
 inet6 subnet x:y:z:1001::/64

We have this implemeneted on a production server. However, that server does not show they igb1:2 and igb1:3 interfaces. I can ping the gateway and the default route. I just dont think the :2, :3 interfaces should show up.

Moderator's Comments:
Mod Comment Please use code tags next time for your code and data. Thanks

Last edited by jpolachak; 06-27-2014 at 11:47 AM.. Reason: code tags
# 2  
What Solaris version exactly?

(Network interfaces are handled very differently in Solaris 11 compared to Solaris 10).
# 3  
Solaris 10. Sorry.
# 4  
Right, it's Solaris 10

I don't know how you've managed to get these interfaces configured (plumbed) but, hopefully, I'll write a few things that may help. This may help you investigate **or provide additional info to us**


A booting Solaris operating system tries to plumb interfaces if it find files


** post the output of

 ls -l /etc/hostname.*


hostname.* files contain just the hostname that the system should be seen as on that particular interface.

That host name is resolved to an ip address (usually by looking in /etc/hosts or /etc/inet/hosts for ipv6) and that ip address is used on that interface.

If you have extraneous plumbed interfaces try moving the hostname.* file(s) out of the way by renaming them (mv).

Being sysadmin professionals here never delete anything, just rename.

Reboot the system and see if it comes out with any complaints/errors.
If so, post them here.

Hope that helps.

Last edited by hicksd8; 06-26-2014 at 05:27 PM..
# 5  
Maybe I am missing somethign. I have the file

That contains
addif x:y:z:1001::41/64 up

When I restart the zone it comes up with igb1:1, igb1:2, and igb1:3. Everything works ok. But I dont think it should show the igb1:2 and igb1:3 interfaces.

So I have also tried to add the following to my /etc/hostname6.igb1 configuration.

addif x:y:z:1001::41/64 up

This does now not give me two extra interfaces igb1:2 and igb1:3. However, now I cannot ping my default route. It appears I am missing the routes that get automatically populated via the first mechanism I spoke about.

My question is what am i missing to configure this to work without getting the additional interfaces? I dont see these extra interfaces in our production server. Below is the working netstat output from a working server with only one interface plumbed igb1:1.

Routing Table: IPv6
  Destination/Mask            Gateway                   Flags Ref   Use    If   
--------------------------- --------------------------- ----- --- ------- ----- 
x:y:z:1004::/64             z:y:z:1004::9        U       1      41 xnf0:1 
fe80::/10                   fe80::216:3eff:fe45:c0c7    U       1       0 xnf0  
ff00::/8                    fe80::216:3eff:fe45:c0c7    U       1       0 xnf0  
default                     x:y:z:1004::14       UG      1    4587       
::1                         ::1                         UH      1       0 lo0

---------- Post updated at 02:16 PM ---------- Previous update was at 02:12 PM ----------

My /etc/inet/ndpd.conf configuration is:
cat /etc/inet/ndpd.conf
ifdefault StatelessAddrConf false
ifdefault StatefulAddrConf false

# 6  
A booting Solaris 10 operating system will take it's default route for ipv6 operation from


This should contain just the ip address of the gateway to which all lan external requests should be sent (assuming there is only one route configured).

Take a look at that.

If the file doesn't exist you can create it with just the gateway ip address on the first line, left justified.

For example:


# 7  
I dont have a /etc/defaultroute6 file on my working production server. My test server I am trying to get this working on I added a persistent route via.

route -p add -inet6 default z:y:z:1001::15

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