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I am trying to make an ISATAP configuration where two ipv6 hosts connected to dual stacked routers can communicate to each other.

I have the following configuration: config

I have configured RIP across the IPV4 network, configured ISATAP tunnels and configured static routing where every packet that arrives an edge router with a host in it's destination will be forwarded to the host.

R1 and R3 seems to be communicating well (pinging to the ipv6 interface works).

the configuration for R1 is:

interface Tunnel 1
no ip address
no ip redirects
ipv6 address 133::/64 eui-64
tunnel source 10.0.1.1
tunnel mode ipv6ip isatap
exit

interface FastEthernet0/0
ip address 10.0.1.1 255.255.255.0
no shutdown
exit

interface FastEthernet0/1
no ip address
no shutdown
ipv6 address 2001::1/64 
exit

ipv6 route 2003::/64 133::5EFE:A00:301
ipv6 route 2001::2/64 FastEthernet0/1
exit

and for R2:

interface Tunnel 1
no ip address
no ip redirects
ipv6 address 133::/64 eui-64
tunnel source 10.0.3.1
tunnel mode ipv6ip isatap
exit

interface FastEthernet0/0
ip address 10.0.3.1 255.255.255.0
no shutdown
exit

interface FastEthernet0/1
no ip address
no shutdown
ipv6 address 2003::1/64 
exit

ipv6 route 2001::/64 133::5EFE:A00:101
ipv6 route 2003::2/64 FastEthernet0/1
exit

**Router model is cisco c375

Thanks

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  • You should include the full router configurations, and the route tables. Commented Jun 12, 2018 at 21:01
  • The second IPv6 route statement on each router is unnecessary, and you should remove it. You do not need an explicit route to a directly connected network, and you could actually cause problems with it. Commented Jun 12, 2018 at 21:02
  • The first IPv6 route cannot be correct because those are not EUI-64 addresses for the interface addresses, and you have the tunnel using EUI-64 addressing. You should explicitly address the tunnel, and you should use IPv6 /127 addressing for a point-to-point link. Commented Jun 12, 2018 at 21:03

1 Answer 1

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solved, Problem was not enabling ipv6 unicast routing. this can be done by using: ipv6 unicast-routing.

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