What is the best MTU size for BSNL FTTH connections?

[alap4m]

@!!..PD..!! The small app that I have mentioned (Simple MTU Test) in my previous comment does exactly what you mentioned. It is an automated Ping Test.

 

[Adithya]

@WieldyBinkie

ping -s 10000 1.1.1.1
PING 1.1.1.1 (1.1.1.1) 10000(10028) bytes of data.
10008 bytes from 1.1.1.1: icmp_seq=1 ttl=57 time=35.9 ms
10008 bytes from 1.1.1.1: icmp_seq=2 ttl=57 time=35.3 ms
10008 bytes from 1.1.1.1: icmp_seq=3 ttl=57 time=52.0 ms
10008 bytes from 1.1.1.1: icmp_seq=4 ttl=57 time=76.5 ms
^C
--- 1.1.1.1 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3006ms
rtt min/avg/max/mdev = 35.369/49.991/76.540/16.729 ms

I don't even know anymore lmao

EDIT: My bad, didn't set -f.

 

[WieldyBinkie]

@Adithya check with ping6 as well

 

[sloj]

@Adithya You need to use don't fragment flag.

 

[xlld]

For bsnl 1460 best .But if u r facing some packetloss or delayed packets for gaming use 1428 ( check lesser value if problem exist even after 1428 ).

 

[alap4m]

MTU stands for Maximum Transmission Unit, which essentially means, the largest or biggest chunk of data that any connection can confidently carry without fragmentation.
While BSNL FTTH can ferry 1460, 1490, or other similarly big chunks, I strongly recommend lowering the MTU number to something like 1428 or even lower and verifying if it helps reduce Packet Loss, Latency, or Delayed Packet transmission.
Do try and manually lower the MTU, and post the results. (Thanks @xlld for the suggestion).

 

[sloj]

Let auto MTU discovery do its work. No need to input custom MTU.

 

[Adithya]

@sloj do you know where the auto mtu is on archer c6? It came default with 1480 even before setup which is exactly the right mtu for my connection. It stopped fragmenting at 1480.

 

[WieldyBinkie]

@Adithya Either leave MTU blank or set it to 1500 for auto-negotiation.

 

[sloj]

@Adithya I just checked my router (currently set as access point). You can't leave MTU blank. Max value you can assign is 1492 for PPPoE. When your connection was up with 1480, that was the max it allowed without fragmentation.