tunnel mode ethernet gre ipv6

[valideursst]

Hi,

I have recently installed a csr1000v (csr1000v-universalk9.03.15.00.S.155-2.S-std) and want to configure a GRE tunnel interface to handle IPV6 over Ethernet over GRE messages.

MY SETUP:

<Wifi client> ==<router1>====<CSR1000V>

-router1 is not cisco

-wifi client is running windows7

-router1 is configured to send all IPV6 messages from associated wifi client over GRE to the GRE concentrator (CSR1000V)

-GRE tunnel mode is  "ethernet gre ipv6"

MY PROBLEM:

The problem is that CSR1000V didn't give any response to wifi client Router Solicitations.

I activated the debugging of tunnel trafic, and found errors like "GRE deprecated unknown packet linktype=79"

I share with you the main configuration lines here:

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ipv6 unicast-routing

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interface Loopback0
 bandwidth 100000
 ip dhcp relay information trusted
 ip address 10.0.0.1 255.255.255.0
 ipv6 address 3000::/64 eui-64
 ipv6 enable

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interface Tunnel6
 mac-address 000c.29d6.4f12
 bandwidth 10000000
 ip unnumbered Loopback0
 ipv6 address FE80:3000:6::1 link-local
 ipv6 address 3006:6::/64 eui-64
 ipv6 unnumbered Loopback0
 ipv6 enable
 ipv6 nd prefix default infinite infinite
 ipv6 nd ra lifetime 120
 ipv6 dhcp server DHCPV6-TUN6 rapid-commit
 tunnel source Loopback0
 tunnel path-mtu-discovery
 tunnel path-mtu-discovery min-mtu 1280

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interface GigabitEthernet1
 ip address 20.168.1.119 255.255.255.0
 negotiation auto
!         
interface GigabitEthernet2
 platform ring rx 256
 ip address 194.247.188.196 255.255.255.0
 negotiation auto
 ipv6 address FE80:3600::1 link-local
 ipv6 address 3600::/64 eui-64
 ipv6 enable
 ipv6 nd managed-config-flag
 ipv6 nd other-config-flag

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ipv6 route ::/0 GigabitEthernet2 FE80:3600::2

Any errors in this configuration lines?

Have any idea about how to implement this feature?

Thanks in advance

[Peter Paluch]

Hi,

I admit I do not have much experience with these tunnel types. However, a number of comments:

1. You said that the tunnel mode is ethernet gre ipv6. However, I do not see a corresponding tunnel mode command in the config of the Tunnel6 interface you have posted.
2. Saying tunnel mode ethernet gre ipv6 on a tunnel interface will require that the tunnel source is an IPv6 address. This command does not in any way impact what protocol will be tunneled. If the tunneled packets are to be carried by an IPv4 network between the tunel endpoints then you need to use the tunnel mode ethernet gre ipv4, and use IPv4 addresses in the tunnel source command.

Best regards,
Peter

[valideursst]

Hi Peter,

Many Thanks for going through this discussion,

Hoops; didn't pay attention for that

I dumped the last configuration I have

But I checked also the case when tunnel mode is "ethernet gre ipv6" and tunnel source is the GUA of loopback0.

Question:

 Is there any specific configuration to add so that the CSR1000 answers to GRE encapsulated RouterSolicitations?

Do you know any other solution that support this tunnel type (ethernet gre ipv6)? I tried with cisco.com/go/fn but I were not able to get relevant answer .

Thanks in advance