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VMB: Hitron CGNV4-5 Static IPS
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Old 17-05-2021, 15:45   #1
waterfallm
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VMB: Hitron CGNV4-5 Static IPS

I've been reading up on posts in here while trying to failt find my own problem with by new VMB setup-VMB supprot next to useless.

This forum post seems to detail my issue but i'dm led to beleive this was resolved 2 years ago.

Can any one confirm if this is still an issue with VMB -5 static IPs ?

My Details are

Firmware version : 4.5.10.201-CD-UPC

GRE Scope: 80.194.154.193/29

Site engineer came saturday and replaced outside box and another due tomorrow to replace router.
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Old 17-05-2021, 19:58   #2
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Re: VMB: Hitron CGNV4-5 Static IPS

you haven't said what your issue is
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Old 17-05-2021, 20:47   #3
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Re: VMB: Hitron CGNV4-5 Static IPS

Quote:
Originally Posted by General Maximus View Post
you haven't said what your issue is
im guessing they have the problem where when you have 5 static IPs the GRE tunnel is useless and give ya ADSL speeds some people suffer badly some have it perfect
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Old 18-05-2021, 10:11   #4
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Re: VMB: Hitron CGNV4-5 Static IPS

As traffic(low levels) is loaded on to staic IP range router starts to lock up and packets start to get lost.

https://www.thinkbroadband.com/broad...a0204513af4574


Router needs to factory reset to get functional again but still dropped packets.

Do we have anyone here with a working VMB 5 or 13 static IP service? If so what kinda workloads are they placing on the Router?

Myself i've found that when i test my latest website with 30 remote VPS each posting some(<1k in size) data to my VMB hosted server the router start to implode.

Bandwidth Image

https://ibb.co/kSy65Gz

QoS Image

https://ibb.co/Y30gtTr

Last edited by waterfallm; 18-05-2021 at 10:32.
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Old 18-05-2021, 16:16   #5
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Re: VMB: Hitron CGNV4-5 Static IPS

For what my opinion is worth, it would be worth seeing your upstream/downstream power and SNR levels. The BQM is indicative of an upstream problem (which always screws downstream), possibly caused by upstream noise.

That might be due to a loose cable into your Hub; you could check with your neighbours because if they have very high upstream power levels, then there is a common fault either at you local cabinet or the launch cabinet et or the optical node.

So, please post your levels.

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Old 18-05-2021, 17:57   #6
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Re: VMB: Hitron CGNV4-5 Static IPS

Port Frequency (Hz) Modulation Power (dBmV) SNR (dB) Channel
1 322750000 256QAM 2.500 40.366 24
2 202750000 256QAM 3.600 38.983 9
3 210750000 256QAM 3.700 38.983 10
4 218750000 256QAM 3.700 40.366 11
5 226750000 256QAM 3.700 38.983 12
6 234750000 256QAM 3.700 38.983 13
7 242750000 256QAM 3.500 40.366 14
8 250750000 256QAM 3.300 38.983 15
9 258750000 256QAM 3.200 38.983 16
10 266750000 256QAM 3.100 40.366 17
11 274750000 256QAM 2.800 40.366 18
12 282750000 256QAM 2.500 38.983 19
13 290750000 256QAM 2.500 38.983 20
14 298750000 256QAM 2.400 38.983 21
15 306750000 256QAM 2.200 40.366 22
16 314750000 256QAM 2.400 38.983 23
17 330750000 256QAM 2.500 40.366 25
18 370750000 256QAM 2.700 40.366 26
19 378750000 256QAM 2.600 38.983 27
20 386750000 256QAM 2.600 40.946 28
21 394750000 256QAM 2.800 40.366 29
22 402750000 256QAM 2.700 40.366 30
23 410750000 256QAM 2.600 38.983 31
24 418750000 256QAM 2.700 38.983 32


Upstream Overview
Port Frequency (Hz) BandWidth Modulation Power (dBmV) Channel
1 53700000 6400000 ATDMA 33.250 6
2 46200000 6400000 ATDMA 32.250 7
3 60300000 6400000 ATDMA 31.750 5
4 39400000 6400000 ATDMA 32.500 8
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Old 18-05-2021, 18:29   #7
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Re: VMB: Hitron CGNV4-5 Static IPS

Those levels are perfectly good. So noise impairment is apparent.
FYI, the power level for the upstream should be less than 51dBmv (the level at which the upstream flaps). Being down at 31 means that less power is needed in the upstream to deliver non-corrupted packets.

This means that, imo, the problem leis with VMB and its GRE tunnel implementation and/or the resources supporting that.

Sorry.
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Old 18-05-2021, 18:34   #8
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Re: VMB: Hitron CGNV4-5 Static IPS

yeap i'm come around to the understanding that the GRE tunnel needs to go in order for me to get VMB up and running.

I checked in with a couple of people reacting to VMB facebook adverts they report similar issues with GRE tunnels still. I had assumed the forums posts from back in 2017/2018 had been resolved, but i now think those people just gave up.

VMB are just insisting on advertising static IP t keep up with other providers.

Those with very simple traffic profiles might work on Static IPs but i'm affraid not me i've got too many connections for the poor old Hitron to cope with.

When i say too many i mean my old WRT3200ACM dealt with it quite easily when i was on EE Broadband Dynamic IP.
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Old 18-05-2021, 20:33   #9
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Re: VMB: Hitron CGNV4-5 Static IPS

The Hitron boots up and handshakes with the VM data centre in the same way as a residential hub. It receives a local IP address as a client of the "residential" host.
All subsequent tunnel traffic goes through that link.

When the link is established, the Hitron firmware sets up the GRE tunnel via the "residential" router at VM data centre, which then routes to a VMB server somewhere that does the rest of the tunnel allocation.

Once up and running, there shouldn't be a problem as it's all a matter of routing; encapsulation isn't a significant overhead. However, if your neighbours aren't getting good speeds, then there's likely to be congestion on the residential side. So it's worth talking to neighbours if you can.

EDIT: I forgot to mention to mention the MTU size. The residential MTU size is 1500 bytes and it'll no doubt be the same at the target end; the GRE tunnel requires 28 bytes overhead and so the data payload is 1476 bytes. This will lead to fragmentation. See Scenario 5 of https://www.cisco.com/c/en/us/suppor...frag.html#anc5 for full explanation.


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Last edited by Sephiroth; 18-05-2021 at 20:40.
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Old 19-05-2021, 00:03   #10
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Re: VMB: Hitron CGNV4-5 Static IPS

The Hitron with 5 static IP addresses is capable of working well without speed impact. It is true there was a problem 2-3 years ago, but that was long fixed and has not returned. I have the 5 static IP option with the Hitron, and get the full 500 Mb/s consistently.

So this config does work - which points to a local problem with you connection that faults should be able to resolve.

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Old 19-05-2021, 13:16   #11
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Re: VMB: Hitron CGNV4-5 Static IPS

Outside box replaced... Router replace but the same issue remains... packet loss leading to internal drop offs of things like video conf.

Today i'll rule out the Static IP tunnel being an issue by dropping into modem only mode.

Luckily the missus is at work site today.

Last edited by waterfallm; 19-05-2021 at 13:26. Reason: spelling
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Old 19-05-2021, 13:28   #12
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Re: VMB: Hitron CGNV4-5 Static IPS

... and please do see what's happening with your neighbours, if you can. It really does plug an evidence hole. At the moment, by reductio ad aabsurdum only, area congestion is suspected.
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Old 19-05-2021, 20:02   #13
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Re: VMB: Hitron CGNV4-5 Static IPS

Quote:
Originally Posted by waterfallm View Post
Outside box replaced... Router replace but the same issue remains... packet loss leading to internal drop offs of things like video conf.

Today i'll rule out the Static IP tunnel being an issue by dropping into modem only mode.

Luckily the missus is at work site today.
Modem mode is not avalible with static IP on VM
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Old 20-05-2021, 11:39   #14
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Re: VMB: Hitron CGNV4-5 Static IPS

@jb66 yeah i was going to do away with the static IP and drop the GRE tunnel.

---------- Post added at 10:34 ---------- Previous post was at 10:31 ----------

So since 1900 last night i remvoed all connections from the VMB router and migrated back to my EE Fibre so VMB router sitting idle still with GRE tunnel setup.

https://www.thinkbroadband.com/broad...b05-20-05-2021

Still viariable latency and dropped packets.

FYI: EE Fibre working a treat.

Raised 4th call with VMB to either fix or removed equipment/install.

---------- Post added at 10:39 ---------- Previous post was at 10:34 ----------

Quote:
Originally Posted by Sephiroth View Post
... and please do see what's happening with your neighbours, if you can. It really does plug an evidence hole. At the moment, by reductio ad aabsurdum only, area congestion is suspected.
Ok i think i can try this using the power of facebook groups.
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Old 20-05-2021, 16:44   #15
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Re: VMB: Hitron CGNV4-5 Static IPS

So i've been running modem with out GRE crendtials and ping returns good reults for latency and 0% dropped packets again.

To revert a Hitron v4 to modem only mode does anything extra need doing otter than follow the guide online?

Note: This router has been updated to 4.5.10.201-CD-UPC firmware and has had GRE credentials entrered but has since been restored to factory.
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