IPV6 Issues 622V

[cjd_1986]

I've been having a problem for a while where I get a /64 instead of a /56 prefix whether I directly connect to the ONT with a cat 6 cable, laptop to 10g port direct on ONT (wifi disabled and router powered down, everything rebooted) or I use my router and also directly LAN connect. So Ive tried hardwired from laptop to ONT and hardwired to router hardwired to ONT. In both cases the result ends up the same.. Tried factory resets and reboots on everything with like almost every config I could think of. IPv6 lasts maybe 5 minutes before it disconnects and becomes unpingable. I got an old 622v ONT btw thats been here for a few years since the previous tenant had connection, the fiber wire also just hangs vertically out the ONT no wallplate it just like comes in through a hole in the wall and runs along the floor and hangs vertically unsecured, I had a tech out once this year because the green connector on the outside of the home like went bad or something and even he commented on like the install job lol like whoever did it yikes. The install is kind of weird and the setup just to mention. Not sure why my NIC when directly connected to the ONT grabs a /64 or why my router grabs a /64 on WAN through DHCP. Called into support they've cleared the mac table and done all that stuff and it works for a while then goes back to square 1. Never gets a /56 though no matter if the routers involved or its direct to the ONT. Ends up with like a poor upload speed if IPV6 works without disconnecting or if its regular speeds then it just disconnects IPV6 within the 6 hour lease time and this is tried both with and without router. Also a connection quality like 90 second ping will have massive spikes maybe every 15 seconds to 100s of ms also both direct to ONT or router. Was gonna try to rent an eero from you guys but being that direct connect also yields very weird results and the lack of the /56.

Router's IPv6 Address On WAN
2001:5a8:601:14::20:11b5/64

[cjd_1986]

Right now I'm hardwired direct to the ONT from my laptop and this is what I get for my IPv6 address

2001:5a8:601:14::20:13cf/128, fe80:90a5812e%6/64

The /128 is the IPV6 pulled via DHCP lease 6 hours. The /64 is just the link local ipv6 address.

IPv6 Route Table
===========================================================================
Active Routes:
If Metric Network Destination Gateway
6 281 ::/0 fe80::669:8fff:fe34:9e31
1 331 ::1/128 On-link
6 281 2001:5a8:601:14::20:13cf/128
On-link
6 281 fe80::/64 On-link
6 281 fe80:90a5812e/128
On-link
1 331 ff00::/8 On-link
6 281 ff00::/8 On-link
===========================================================================
Persistent Routes:
None

Ethernet adapter Ethernet:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GbE Family Controller
Physical Address. . . . . . . . . : C8-7F-54-C9-CE-0B
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . : 2001:5a8:601:14::20:13cf(Preferred)
Lease Obtained. . . . . . . . . . : Sunday, May 4, 2025 5:15:02 AM
Lease Expires . . . . . . . . . . : Sunday, May 4, 2025 11:15:02 AM
Link-local IPv6 Address . . . . . : fe80:90a5812e%6(Preferred)
IPv4 Address. . . . . . . . . . . : 23.93.197.30(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.224.0
Lease Obtained. . . . . . . . . . : Sunday, May 4, 2025 5:15:05 AM
Lease Expires . . . . . . . . . . : Sunday, May 4, 2025 11:15:04 AM
Default Gateway . . . . . . . . . : fe80::669:8fff:fe34:9e31%6
23.93.192.1
DHCP Server . . . . . . . . . . . : 75.101.33.35
DHCPv6 IAID . . . . . . . . . . . : 113803092
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-2B-CB-BF-DA-C8-7F-54-C9-CE-0B
DNS Servers . . . . . . . . . . . : 2001:5a8::11
2001:5a8::33
50.0.1.1
50.0.2.2
NetBIOS over Tcpip. . . . . . . . : Enabled

Name: Ethernet
Description: Realtek PCIe GbE Family Controller
Physical address (MAC): c8:7f:54:c9:ce:0b
Status: Operational
Maximum transmission unit: 1500
Aggregated link speed (Receive/Transmit): 1000/1000 (Mbps)
DHCP enabled: Yes
DHCP servers: 75.101.33.35
DHCP lease obtained: ‎Sunday, ‎May ‎4, ‎2025 5:15:04 AM
DHCP lease expires: ‎Sunday, ‎May ‎4, ‎2025 11:15:04 AM
IPv4 address: 23.93.197.30/19
IPv6 address: 2001:5a8:601:14::20:13cf/128, fe80:90a5812e%6/64
IPv4 default gateway: 23.93.192.1
IPv6 default gateway: fe80::669:8fff:fe34:9e31%6
DNS servers: 2001:5a8::11 (Unencrypted)
2001:5a8::33 (Unencrypted)
50.0.1.1 (Unencrypted)
50.0.2.2 (Unencrypted)
Network name: Network
Network category: Public
Connectivity (IPv4/IPv6): Connected to Internet

Aggregated link speed (Receive/Transmit): 1000/1000 (Mbps)
IPv6 address: 2001:5a8:601:14::20:13cf
Link-local IPv6 address: fe80:90a5812e%6
IPv6 default gateway: fe80::669:8fff:fe34:9e31%6
IPv6 DNS servers: 2001:5a8::11 (Unencrypted)
2001:5a8::33 (Unencrypted)
IPv4 address: 23.93.197.30
IPv4 DNS servers: 50.0.1.1 (Unencrypted)
50.0.2.2 (Unencrypted)
Manufacturer: Realtek
Description: Realtek PCIe GbE Family Controller
Driver version: 1168.22.1116.2024
Physical address (MAC): C8:7F:54:C9:CE:0B





On a side note even while direct connected my bufferbloat is huge on the upload. The download is reasonable most packets are 7-60ms. For Upload most packets are over 200ms. I get a grade of C. Latency monitoring tools show constant horrible spikes and I can connect anything direct to the ONT bypass router and get this. The upload tends to be very poor and the v6 never gives a /56 for WAN on router or direct.

[cjd_1986]

Im at a loss since like the best option has been to disable ipv6 entirely but that causes issues in its own. Whether the router itself or any devices that connect to it or even any devices I can hardwire into the ONT to test 1 on 1 kind of same results. IPV4 only with sonics dns and dhcp download and upload are fine. With v6 sonic dns and ip the upload usually gets horrid while the download remains fine. Though with 4 only 6 only or both the bufferbloat is always there on the upload and no way nothings using that much bandwidth. I did see a whole lot of ddos in my logs but I think its false, ip changes anytime reboot ONT or 6 hour lease. Not like when I had cable lol could keep the same dynamic IP almost like a static practically would just recatch the same ip over and over again unless you had like a power outage of sorts. Kind of bad with sonic for those services that ask for tons of extra verification because your ip changes every 6 hours lol whether or not routers involved in the equation. Wouldnt be surprised if I have one of the bad ONTs or the install. Once the ONT or fiber line issue is solved I dont mind trying out some eeros.

[klui]

I don't use IPv6 but have it enabled on my gateway. My gateway is not Sonic-owned.

My ONT is also an Adtran 622v. I've never gotten a /56, only /64. But getting an v6 IP takes a long time--at least 15 minutes after the request. The address has never changed at the end of the lease period. In fact, the ONT recently had its firmware updated and both IPv4/IPv6 addresses were unchanged after the ONT came back online while my gateway was still running. Downtime was 5 minutes. Pings work fine from my gateway to IPv6 addresses.

V4/v6 WAN addresses change only when I manually ask my gateway for a renew, release/renew, or reboot.

I'm curious why you think getting a /56 will help your upload speed. In addition if your IPv4 is working then your physical topology, while it seems sketchy to you, is probably not an issue.

[cjd_1986]

Well, I know there is an upload issue regardless (as well as a router issue i've isolated hence also bypassing it for troubleshooting purposes) or packet ping loss spike on the upstream which is prob an ONT or line or backend issue but if I enable v6 on the router or my nic it contribues to like a 50 mbps upstream instead of a 500 mbps upstream. Also the ips renew every 6 hours for me whether its router or router free and its a new IP every single time. A release and renew will instantly get a different public IP. Whereas on any other isp unless you kept the equipment offline for a while you never got a brand new IP. The IPv6 also drops it doesn't sustain so there is a major connection issue going on beyond my internals mostly in not the ONT cycling but major frequent rapid succession slowdowns. Mostly its just sonic selling me on a rent our eero makes me skeptical that it'll solve the issue since I know there's an issue at the ONT level when I can direct plug in a few different devices and reproduce the problems. Had tech out before to replace wiring in the transition box cause the fiber light was red for days with no service. It went bad and he even said the installer was bad (the install was done a few years back likely ive only had it for a year and its been fine until last month) and didn't like how the inside was installed but he just said he'd leave it for now. I also have seen other threads on here where people said they got a /64 and some green name replied and said hold on and then they were getting a /56 so. Just making sure backend stuff is being checked. Tech support is nice but I know the techs you chat and text with are limited in scope, some are knowledgable but I can tell they just know basics. The green guys on the forums seem to know more NOC type level troubleshooting. Wouldnt come on here and make a bunch of stuff up to just say "blame it on CPE" it's the last thing I'd do before wasting anyones time or a truck roll which I hope to avoid. I'm going to go ahead and try an eero but if im still having like 200ms uploads to 10ms downloads and tons of packet loss and jitter and stuff its prob the ONT or fiber line despite someone saying "signal levels look healthy" I used to work for many a ISP and even with healthy signals truck rolls could still find non CPE issues and stuff especially with intermittent things, they'll just see I have a solid connection which I do. It doesn't drop offline at all it just slows down to a snail crawl and then is very fast and so on back and forth.

[cjd_1986]

Even support told me its like flooding or holding onto macs and duplicating etc etc like the release renews are messing up on their end and all they do is send a signal to flush it from their end to fix it for like a day so its obviously getting stuck somewhere on their end and using their v6 dns makes it worser than their v4 dns. If I was to power down the ont and plug in a different laptop and do it again and again after a few tries IPv6 will be down for like 24 hours before any singular device can even grab an IP from the device unless supports open to you know push a signal to the ONT so it can reboot.

[cjd_1986]

Did get a kind of customer relations reach out to offer a month to try an eero but if the root cause isnt any singular device or router and back ends like neglecting to look into it. $50 is nice a month but I dont need 10 gig i can do just fine with 1 or less but just need it consistent. My area doesnt even get half of that speed anyways with a 10 gig plugged in running a speed test it gets like 2.5 tops up and down and used a 10 gig wan tester before. But yeah the other guys arent so great in price but much more reliable at least. Years of X the only problem was the price was double other than that gig was sufficient and no issues.

[cjd_1986]

Went ahead and got the WiFi Pro 6E to try out maybe it'll catch something since they can do diagnostic and speed test to it the 7 for me like the service is just too much my current router is overkill itself its just weird that direct connect to ONT yields like a lot of the same and I need ipv6 some of my work stuff relies on it so turning it off isn't like a good solution or hopefully things stabilize with it at least. No clue about like upload high ping, ddos, and like low uploads frequent. But if the router catches it on diagnostic with TS then they'll see what I'm talking about. Otherwise that is all!

[daniel15]

The only real advantage of a /56 or /60 over a /64 is that you can subnet it - 16 subnets for /60 and 256 subnets for /56. For example, if you want to have multiple VLANs each on their own subnet. It shouldn't affect performance. If your entire network is in one subnet/VLAN, a /64 range is all you need.

As far as I know, your router also needs to explicitly request a /56 range, otherwise it'll only get a /64. Should be in its settings, although if your router doesn't support VLANs, it likely won't support IPv6 ranges larger than /64 (since it doesn't really have a use for it)

[klui]

Interesting.

I just tried to request a preferred prefix length of 56 but still got a /64. I would want to subnet my addresses because I make use of VLANs. Are there any resources that describes how one would make use of subnetting on IPv6?

Sonic made some changes to their backend. In the past when I performed a renew I got a new v6 IP. I got the same IP as before and more encouraging the response was complete in 30 seconds. I got the same behavior when I released the lease and requested a new one.