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Huthayfa
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RB951g-2HnD PPPoE config

Sat Aug 11, 2018 7:43 am

Hi,
I am having the following setup:
300 down/80 up Mbps Fiber connection - Alcatel ONT on bridge mode - MT RB951G - local devices.
I have manged to establish internet connection through PPPoE over VLAN setup, which my ISP is using.
every online activity is fine except my PS4 and Xbox online gaming which is most important to me.
I am facing a rubber banding and latency spikes on both consoles.
I am runing UPnP just fine, but I am in doubt about my MTU parameter.
considering the MT wiki, VLAN adds 4 byte header to the connection, so if I understand correctly, ETH1 ( connected to ONT) has 1500 bye MTU, VLAN under it should have 1496 MTU, and PPPoE client should have 1476 MTU.
I am in doubt since I am not sure if that even could be the right path to investigate the problem.
I even tried to set Queue setup however, that dropped my bandwidth to 100 Down Mbps instead of 300.
thanks in advance.
 
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mkx
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Re: RB951g-2HnD PPPoE config

Sat Aug 11, 2018 10:50 am

VLAN indeed adds 4 byte header, but VLAN-path increases ethernet frame size by same amount so L3 MTU remains 1500 bytes. It's done this way so that VLAN segment is transparent to LAN devices if they are not using VLAN tags.
So it's not necessary to account those 4 bytes.
 
Huthayfa
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Re: RB951g-2HnD PPPoE config

Sat Aug 11, 2018 11:24 am

VLAN indeed adds 4 byte header, but VLAN-path increases ethernet frame size by same amount so L3 MTU remains 1500 bytes. It's done this way so that VLAN segment is transparent to LAN devices if they are not using VLAN tags.
So it's not necessary to account those 4 bytes.
thank you so much.
okay, do you have an idea what are the max bandwidth I can achieve if I setup QoS on this router ?
I am a big noob in this side, I just want to achieve least gaming connection latency and buffer without cutting my bandwidth too much.
thank you again.
 
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mkx
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Re: RB951g-2HnD PPPoE config

Sat Aug 11, 2018 12:01 pm

I don't think this router is capable of routing 300/80 Mbps with half decent FW and QoS setup. Specially so if WiFi is used (WiFi under load can consume quite some CPU power). This inability probably shows while gaming as, I presume, gaming uses smaller packets and routing capacity actually limits achievable pps.
 
Huthayfa
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Re: RB951g-2HnD PPPoE config

Sat Aug 11, 2018 12:46 pm

I don't think this router is capable of routing 300/80 Mbps with half decent FW and QoS setup. Specially so if WiFi is used (WiFi under load can consume quite some CPU power). This inability probably shows while gaming as, I presume, gaming uses smaller packets and routing capacity actually limits achievable pps.
thanks my friend.
okay, as per your statement, do you advise me to install OpenWRT firmware instead of RouterOS for my objective?
does OpenWRT achieves better my performance objective?

thanks once again.
 
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mkx
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Re: RB951g-2HnD PPPoE config  [SOLVED]

Sat Aug 11, 2018 1:02 pm

I can't comment on OpenWRT performance as I don't have any experience.

Personally I'd invest in some more recent RB though. hEX (RB750Gr3) should be doing much better job than RB951G for very reasonable price.
 
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CZFan
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Re: RB951g-2HnD PPPoE config

Sat Aug 11, 2018 4:52 pm

I don't think this router is capable of routing 300/80 Mbps with half decent FW and QoS setup. Specially so if WiFi is used (WiFi under load can consume quite some CPU power). This inability probably shows while gaming as, I presume, gaming uses smaller packets and routing capacity actually limits achievable pps.

This device has the same CPU / Memory config as my RB2011UiAS-2HnD-IN, I route over 800Mb up / down so this device should be able to do 300 / 80.

I have no QoS, but use Fasttrack
 
Huthayfa
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Re: RB951g-2HnD PPPoE config

Sun Aug 12, 2018 4:56 am

I don't think this router is capable of routing 300/80 Mbps with half decent FW and QoS setup. Specially so if WiFi is used (WiFi under load can consume quite some CPU power). This inability probably shows while gaming as, I presume, gaming uses smaller packets and routing capacity actually limits achievable pps.

This device has the same CPU / Memory config as my RB2011UiAS-2HnD-IN, I route over 800Mb up / down so this device should be able to do 300 / 80.

I have no QoS, but use Fasttrack
thank you very much sir,
do you use PPPoE while achieving that bandwidth?
because, at my side I see the CPU hit 90-100% while testing my bandwidth through speed test which is 300/80 indicating that my router is maxed out. I am sure something is miss configured on my side and I am investigating it right now
thanks.

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