[j-nsp] ipInIp interface got the same IPV6 address on both end?

[zeng watchthinker]

Actually I want to setup a tunnel between 2 logical routers and use IPV4 
tunnneling IPV6 traffic.

It is strange I can have OSPF3 get to full status and learn routes while 
with RIPng I learn no route even I use a policy to export local routes to 
RIPng...

juniper at p3# run show ripng neighbor logical-router r1 
                    Source                           Dest               In
Neighbor     State  Address                          Address  Send Recv Met
--------     -----  -------                          -------  ---- ---- ---
ip-0/0/0.0      Up fe80::2a0:a5ff:fe12:6920         ff02::9  yes yes    1

[edit logical-routers]
juniper at p3# run show ripng neighbor logical-router r2    
                    Source                           Dest               In
Neighbor     State  Address                          Address  Send Recv Met
--------     -----  -------                          -------  ---- ---- ---
ip-0/0/0.1      Up fe80::2a0:a5ff:fe12:6920         ff02::9  yes yes    1

[edit logical-routers]
juniper at p3# show r1 protocols ospf3  
area 0.0.0.0 {
    interface ip-0/0/0.0;
}

[edit logical-routers]
juniper at p3# show r2 protocols ospf3    
area 0.0.0.0 {
    interface ip-0/0/0.1;
}

[edit logical-routers]
juniper at p3# run show ospf3 neighbor logical-router r1 
ID               Interface              State     Pri   Dead
10.0.6.2         ip-0/0/0.0             Full      128   36  
  Neighbor-address fe80::2a0:a5ff:fe12:6920

[edit logical-routers]
juniper at p3# run show ospf3 neighbor logical-router r2    
ID               Interface              State     Pri   Dead
10.0.6.1         ip-0/0/0.1             Full      128   37  
  Neighbor-address fe80::2a0:a5ff:fe12:6920


>From: "Guy Davies" <Guy.Davies at telindus.co.uk>
>To: "zeng watchthinker" <watchthinker at hotmail.com>
>Subject: RE: [j-nsp] ipInIp interface got the same IPV6 address on both 
end?
>Date: Wed, 2 Nov 2005 14:16:34 -0000
>
>Shouldn't the network element of the address (i.e. the first 64 bits) be 
unique?  A /64 is associated with a single link.  You're creating two 
separate links here unless you're trying to create an ip-in-ip tunnel 
between your two logical routers on the same physical router???  You've 
created the them both using the same stub.  The fact that the eui-64 
mechanism creates the same address is not entirely unexpected because I 
suspect it uses a single MAC to derive the addresses (although it would 
have been handy in some ways for the device to create different host 
portions of the address).
>
>Rgds,
>
>Guy
>
>-----Original Message-----
>From: juniper-nsp-bounces at puck.nether.net 
[mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of zeng watchthinker
>Sent: 02 November 2005 14:04
>To: juniper-nsp at puck.nether.net
>Subject: [j-nsp] ipInIp interface got the same IPV6 address on both end?
>
>I made 2 ipip interface in 2 logical routers. While I find the same IPV6 
address is created on these two ipip interface.
>
>Seems there is some problem?
>
>[edit logical-routers]
>juniper at p3# show r1 interfaces
>ip-0/0/0 {
>     unit 0 {
>         tunnel {
>             source 10.0.4.5;
>             destination 10.0.4.6;
>         }
>         family inet {
>             address 1.1.1.1/30;
>         }
>         family inet6 {
>             address 2:10::/64 {
>                 eui-64;
>             }
>         }
>     }
>}
>
>juniper at p3# show r2 interfaces
>ip-0/0/0 {
>     unit 1 {
>         tunnel {
>             source 10.0.4.6;
>             destination 10.0.4.5;
>         }
>         family inet {
>             address 1.1.1.2/30;
>         }
>         family inet6 {
>             address 2:10::/64 {
>                 eui-64;
>             }
>         }
>     }
>
>juniper at p3# run show interfaces terse
>Interface               Admin Link Proto Local                 Remote
>gr-0/0/0                up    up
>ip-0/0/0                up    up
>ip-0/0/0.0              up    up   inet  1.1.1.1/30
>                                    inet6 2:10::2a0:a5ff:fe12:6920/64
>                                          fe80::2a0:a5ff:fe12:6920/64
>ip-0/0/0.1              up    up   inet  1.1.1.2/30
>                                    inet6 2:10::2a0:a5ff:fe12:6920/64
>                                          fe80::2a0:a5ff:fe12:6920/64
>
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