IPv6 and IPv4 on the same interface

[Zeeeee]

Hi,

This will be my first time setting up IPv6, so I am doing a test first and I have a query to ask the experts here.

I have enabled ipv6 routing with ipv6 unicast-routing.

I added ipv6 point-to-point ip on the same interface as ipv4, as shown below, and suddenly face with some packet loss.

The packet loss is only affecting ipv4 as there is no ipv6 devices that is sitting behind my routers.

Am I right to say that the packet loss is not due to setting ipv6 on the same interface as ipv4?

interface Vlan5
description TEST_IPv6
ip address x.x.x.2 255.255.255.252
ipv6 address x:x:x:x::2/64
end

Thanks in advance!

[Georg Pauwen]

Hello,

I am not sure if you need 'ipv6 enable' on the Vlan interface, can you give that a try ?

What packet loss are you experiencing, inter Vlan, intra Vlan ?

[Zeeeee]

Hi Georg,

I think it is necessary. I was able to ping to the other end only after the enabling IPv6.

I meant, I am unsure that this is the cause of inter vlan packet loss. I was just assuming and hoping someone who has the same type of configuration could clarify.

[Georg Pauwen]

Hello Aizat,

what does your network topology look like ? Does the packet loss occur between hosts, and which hosts ? What device is the inter Vlan routing configured on ? Post the configuration of that device...

[Julio E. Moisa · Accepted solution]

Hi

You can have IPv4 and IPv6 addresses under the same interface and it will not generate any kind of problem, it should works perfectly. 

IPv6 enable command under an interface is used when you dont have any global ip address, so it will create one using the segment FE80 (link-local) + EUI 64.