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How do a telecom service provider can migrate their network to IPv6?

+2 votes
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posted Dec 31, 2015 by Sadanandan

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There are many components,
One is the network nodes migration and another is UE migration. What us your context?

1 Answer

0 votes

As Salil Pointed out -

Lets assume you are trying to migrate the network first - for transition period you may need to have a dual stack which will put the traffic in IPv6 or IPv4 cloud based on the traffic. Remember when you migrate it would be in steps i.e. nodes by nodes and the external element may or may not migrate at all.

Dual Stack Router
enter image description here

Another device you would require would be NAT-PT device as in the transition phase A host with IPv4 address may be sending a request to an IPv6 enabled server which may not understand IPv4 address.

NAT-PT Device
enter image description here

answer Dec 31, 2015 by Maninder Bath
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I have a kvm host and I try to install a centos 6 guest with a static ip address.

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noipv4 ipv6=... gateway=... dns=... ks=http…

This gets me so far that I can ping6 the guest from the host, but I can not reach it from outside. When I ping from outside I see the guest sending neighbor solicitation requests for the IP I ping from, but this IP is in another network. I think the guest does not get a gateway configured. At least the ipv6 option is working, because I can ping the guest from the host.

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Is IPv6 a must for LTE? Can we have a device supporting only IPv4 or can operator launch a service with IPV4 support?

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I'm afraid that I've done an incredibly stupid thing. First. I removed IPV6 from my system. Second, I upgraded to Ubuntu13.04. Third, I misplaced the instructions for deleting IPV6. Now, I evidently need IPV6 and don't know how to reverse my past sins can someone help me out? I think that I removed ipV6 by changing a configuration file and then remaking Grub.

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+3 votes

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0 votes

I usually have some default rules in place on all nodes which look about like this:

-A INPUT --in-interface lo -j ACCEPT
-A OUTPUT --out-interface lo -j ACCEPT

-A INPUT -m state --state UNTRACKED -j DROP
-A FORWARD -m state --state UNTRACKED -j DROP
-A OUTPUT -m state --state UNTRACKED -j DROP

-A INPUT -m state --state INVALID -j DROP
-A FORWARD -m state --state INVALID -j DROP
-A OUTPUT -m state --state INVALID -j DROP

#handle IPsec only sources/destinations
#snip/snap

#allow incoming packets for all established and all related connections
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

#allow incoming ICMP packets
-A INPUT --protocol icmpv6 -j ACCEPT

And the same for IPv4.

The idea with dropping the UNTRACKED/INVALID was that such packages are probably not good fellows and should stay out...

Okay... now with IPv4 everything works as expected...

But with v6 nothing works at all and I get Destination unreachable (even on pings)... I can't even reach the gateway.

When I disable dropping the untracked packets... it starts working,..even when afterwards I enable it again.
Seems that there is some connection between the host an the gateway shown then by conntrack.

Now... question is why?

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