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IPv6 Prefix on Fiber

David92
I plan to stick around

Is there a way to get a larger prefix than /64 on IPv6 over fiber? I'm trying to figure out if it's something on my end or if it is even supported?

 

There are many posts all over where other people make reference to using a /56 prefix without issue. Is this something that is only partly implemented and it depends on where you are?

 

 

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56 REPLIES 56

Re: IPv6 Prefix on Fiber

Good morning @mozerd.

 

Voicing your needs and suggestions for changes to our service here is one of the better ways to be heard. We understand better than anyone that our super users have needs and wants for their home network that go beyond that of the average user.

 

I would not suggest escalating to the Office of the President for this. It is not something that they have the power to change immediately and they are a group that is intended to handle customer escalations for issues that our front line support has been unable to resolve. They are not technical support experts (or well versed in this type of expertise) and would not be able to help troubleshoot a custom made router setup using PfSense.

 

Please also understand that customizing your own third party networking equipment is not something that we directly support. Our primary intention is for customers to connect using our gateway, removing the gateway entirely might "work" if you have an ONT but once you remove the gateway, you're no longer using an officially supported setup. The kinds of setups being discussed in this thread are considered unsupported and thus our Office of the President would not be well suited to provide support.

 

Regards,

RogersCorey

Re: IPv6 Prefix on Fiber

mozerd
I plan to stick around

Hi Corey

if it works on Rogers Cable Internet it must also work on Rogers Pure Fiber Internet because that is the nature of IPv4 and Ipv6 regardless of the “Access Method being Cable or Pure Fiber” … for as long as I can remember Rogers has supported Bridge mode on its gateways where most advanced users would implement ipv6 having /56 PD … A number of users have complained “here” that on pure Fiber they are not getting a /56 … this has been outstanding for at least 6 months or more … but no one from Rogers has shown an interest in investigating this or addressing this issue ….  I happen to know that many plants are undergoing “multi-layer configuration changes” so perhaps that had been the cause BUT it should not be the cause. Someone from your group here needs to contact the NOC and inform them of this issue. If the NOC is not responsive then users have no other recourse but to contact the Office of the President and express a concern ….

additional reference for you 

https://www.dslreports.com/forum/r33652078-IPv6-Prefix-Size

David Mozer
IT-Expert on Call

Re: IPv6 Prefix on Fiber

JKnott
I'm a reliable contributor

I agree.  From an IP point of view, it should make no difference on how you connect.

BTW, I was surprised to see me listed as a reference on the dslreports thread.  While I have done some work for Rogers, I have never been an Rogers employee.  The closest I've come to that was when I worked for Unitel and Rogers was part owner.

 

That said, Roger can be difficult to work with at times.  A little over 5 years ago, I had a problem where IPv6 stopped working properly.  I was running pfSense for my router/firewall.  Through my own testing, I knew the problem was not in my equipment.  For example, I could try to ping something like Google and I'd see the ping go out, but no response.  I also tried pinging my own network from a different connection.  I could ping my WAN interface, but nothing on the LAN, as those packets weren't even reaching my router.  This indicated a routing problem with my prefix.  I then called 2nd level support (I rarely waste my time with 1st level, as I know more than they do) and demonstrated the issue to them.  They agreed it was a Rogers problem, but those responsible refused to do anything as I had my own router.  This despite the fact that the same issue affected my next door neighbour and he only had a single computer connected to the cable modem, which was in gateway mode.  I complained to the office of the president and a senior tech came to my home.  He brought his own modem and computer and experienced the same problem.  He then went back to the Wolfedale office and tried with 4 different CMTS and it worked OK with 3, but not the one I was connected to, the exact same one that I had identified by host name, with my own testing, before he showed up.  I had even provided him with a packet capture, showing the error message.  With him now being able to show that my CMTS was failing, he was finally able to get those responsible to get off their butts and fix the problem.  It's been fine ever since.

 

Incidentally, last year I was doing some work in the Wolfedale office, including around my CMTS.

Re: IPv6 Prefix on Fiber

mozerd
I plan to stick around

@JKnott Thanks for chiming in with your experience.

I am sure that you are aware that In a fiber-optic network the CMTS is replaced by the Optical Line Terminal (OLT). What I suspect is that the OLT has not been properly configure for those that are on the Rogers Pure Fiber Network. Perhaps [my speculation] Rogers has implemented the virtual CMTS (vCMTS) approach since Rogers has embarked on the Multi-Tier network topology but regardless users that need the /56 PD should be properly served on the Pure Fiber Network as they are on the COAX side   --- this is really a very minor configuration issue but it requires a knowledgeable person to make the appropriate configuration regardless of the access method and only the NOC can get the resource working on that.

 

David Mozer
IT-Expert on Call

Re: IPv6 Prefix on Fiber

-G-
Resident Expert
Resident Expert

@mozerd wrote:

this is really a very minor configuration issue but it requires a knowledgeable person to make the appropriate configuration regardless of the access method and only the NOC can get the resource working on that.


Maybe; maybe not.

 

On the DOCSIS side, Rogers originally only offered a /64 prefix:

 

At the moment, the delegated prefix length is limited to a /64. We understand that some of you are eager to get a larger prefix in order to take advantage of some of the advanced functionalities IPv6 has to offer. Now that we have completed the rollout, our engineering teams are currently assessing the effort required to enable this functionality.

 

Obviously, they were able to get this resolved and enable us to request a larger prefix.

 

I don't know what routing infrastructure Rogers is using for their XGS-PON FTTH customers.  If someone who is using their own router/firewall would be so kind as to display their ARP table and post the OUI portion of their default gateway's MAC address, that would reveal the manufacturer of the next-hop router.  If Rogers happens to be using the same routing infrastructure for XGS-PON as their mobile networks, that may be what is limiting them to issuing a /64 PD.

Re: IPv6 Prefix on Fiber

JKnott
I'm a reliable contributor

@-G- wrote:

If someone who is using their own router/firewall would be so kind as to display their ARP table and post the OUI portion of their default gateway's MAC address, that would reveal the manufacturer of the next-hop router.

Given Rogers moving to IPv6, that might not work as ARP might not be used.  With IPv6, you can list neighbours or their MAC addresses.  If possible, do a packet capture, so you can see what's happening.

Re: IPv6 Prefix on Fiber

-G-
Resident Expert
Resident Expert

@JKnott wrote:

@-G- wrote:

If someone who is using their own router/firewall would be so kind as to display their ARP table and post the OUI portion of their default gateway's MAC address, that would reveal the manufacturer of the next-hop router.

Given Rogers moving to IPv6, that might not work as ARP might not be used.  With IPv6, you can list neighbours or their MAC addresses.  If possible, do a packet capture, so you can see what's happening.


I was referring to the ARP table for IPv4.  I'm not picky about how we ID the router at the next hop.  🙂

Re: IPv6 Prefix on Fiber

JKnott
I'm a reliable contributor

@-G- wrote:

I was referring to the ARP table for IPv4.

 

Problem is there might not be any native IPv4.  The trend is to do everything with IPv6, including encapsulating IPv4 in IPv6.  Some other ISPs are doing this.  I don't know about Rogers cable, but it's certainly the case with their cell network.  My cell connection is IPv6 only, with 464XLAT used for IPv4, which converts IPv4 to IPv6, when needed for IPv4 only sites.  That's why I suggested a packet capture, if they can manage it, to see what's actually going over the wire (fibre).  Packet capture is easy enough to do with pfSense or OPNSense.  Then use Wireshark to examine the packet.

Re: IPv6 Prefix on Fiber

-G-
Resident Expert
Resident Expert

@JKnott  XGS-PON could still be a dual-stack IPv4/IPv6 service.  Yes, IPv6 + 464XLAT for IPv4 is a possibility but I have not seen any FTTH customers reporting any limitations that would be associated with that implementation.

 

Right now, I'm just looking to see if we can get any hints as to why Rogers might currently be limited to issuing a /64 PD to FTTH customers.

Re: IPv6 Prefix on Fiber

-G-
Resident Expert
Resident Expert

@JKnott wrote:

@-G- wrote:

I was referring to the ARP table for IPv4.

Problem is there might not be any native IPv4.  The trend is to do everything with IPv6, including encapsulating IPv4 in IPv6.  Some other ISPs are doing this.  I don't know about Rogers cable, but it's certainly the case with their cell network.


On the cable side, even with the move to Casa DAA / R-PHY nodes and virtualized (vBNG) routing, it is still native dual-stack IPv4/IPv6.

Re: IPv6 Prefix on Fiber

mozerd
I plan to stick around

@-G- wrote:

Maybe; maybe not.


KISS: 

Configuration steps:

ISP Router Configuration:

  1. Enable IPv6 routing [DONE]

  2. Configure the DHCPv6 prefix pool and the size of prefixes that we want to assign to customers. [DONE]

  3. Configure the interface facing the customer’s router with an IPv6 address and enable it to act as a DHCPv6 server. {DONE]

  4. Assign the /56 IPv6 prefix to the WAN interface of the customer's router using DHCPv6 Prefix Delegation. [NOT DONE]

Nothing could be simpler .... no ROCKET Science involved ...

Just need a resource from the NOC to look how the OLT are configured in each access zone and make the proper adjustments to communicate with the DHCP server assigned to this TASK

 

What am I assuming?  that Rogers do have the  proper engineering process are in place.

David Mozer
IT-Expert on Call

Re: IPv6 Prefix on Fiber

roytoy
I plan to stick around

Is there really no rogers employee that can comment on this? We are not asking for support for our own hardware or configuration. This is not a front end support issue. This is a infrastructure issue. Rogers is not supply prefixes larger than /64 to their end customers regardless of hardware of customer side configuration right now. This is cripples IPv6.

We're asking for an answer on Rogers providing full IPv6 functionality to their fiber customers.

Re: IPv6 Prefix on Fiber

mozerd
I plan to stick around

Said by @roytoy "This is a infrastructure issue" ... 100% Correct ... 

 

The negligence is astounding to say the very least ...

David Mozer
IT-Expert on Call

Re: IPv6 Prefix on Fiber

otakunorth
I plan to stick around

Sorry for barging into this thread, I just moved from Rogers cable to Roger Fiber (in downtown toronto) and left all my networking gear the same except the OPN for the new fiber and realised my ipv6 stopped working. 
Just found this thread and confirmed I'm limited to /64 when on cable I had /56 I belive 
......WHY?  

Re: IPv6 Prefix on Fiber

mozerd
I plan to stick around

@otakunorth 

I suggest that you write the Office of the President and express a concern because no one on the forum seems to have any kind of influence in helping to solve this issue … very sorry to have to say that..

David Mozer
IT-Expert on Call
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