In reply to a post by Jelly_Tussle:

In reply to a post by johnjburness:

In reply to a post by Jelly_Tussle:

As you can probably tell from my questions in this thread and the fact that I have described myself as a 'techno-dunce'; that this entire subject is pretty much a foreign language to me

Please accept my apologies for my simple request for clarification.

Don't worry about it!

Despite the impressions that you may get, it is ALWAYS worth double-checking if you have the slightest uncertainty about what you are doing!

Don't forget, the ONLY daft question is the one that you DON'T ask!

Thanks John; I appreciate your comments. It can be very worrying when you are making changes and not fully understanding what you are you doing. That's why I need clear and simple guidance and if I am in any doubt I like to double check.

I appreciate everyone's kind help on this thread.

I'm just not sure what to do now; as my router will not accept a change of MTU to 1500. It would seem the highest number I can input is 1492 and it was said earlier that this was the figure for a fibre connection; which I don't have.

Should I leave the MTU figure as it is (1400) or change it for another value?

Thanks.

I'm not particularly knowledgeable about the impact of various MTU settings - other than to suggest that nothing disastrous will happen!!

Change it to 1492 & see what happens! The worse that can happen is that you decide to change it back!

To be honest, unless you are really trying to maximise your performance, I suspect that you won't see much difference on day-to-day running/performance!

In reply to a post by Jelly_Tussle:

Should I change the MTU figure to 1492

Definitely change MTU to 1492 if router restricts you to that.

You remember early on in this thread I said this?

In reply to a post by XRaySpeX:

You'll prob also need to change MTU to 1500 or at least 1492. In fact I'm surprised that it's set to 1400 for BT. Sure that will be slowing you down by unnecessary fragmentation of packets.

In reply to a post by johnjburness:

Change it to 1492 & see what happens! The worse that can happen is that you decide to change it back!

To be honest, unless you are really trying to maximise your performance, I suspect that you won't see much difference on day-to-day running/performance!

Ok; thanks. I wasn't sure if changing the MTU figure to something it should not be would cause any damage.

In reply to a post by XRaySpeX:

In reply to a post by Jelly_Tussle:

Should I change the MTU figure to 1492

Definitely change MTU to 1492 if router restricts you to that.

You remember early on in this thread I said this?

In reply to a post by XRaySpeX:

You'll prob also need to change MTU to 1500 or at least 1492. In fact I'm surprised that it's set to 1400 for BT. Sure that will be slowing you down by unnecessary fragmentation of packets.

Thank you; I appreciate your advice.

I do remember your earlier advice; but as you also said:

In reply to a post by XRaySpeX:

1500 for ADSL2+ or 1492 for fibre.

I was a little uncertain as to what to do; so just wanted to double check. Please forgive my confusion.

Many thanks for the clarification.

In reply to a post by Jelly_Tussle:

I do remember your earlier advice; but as you also said:

In reply to a post by XRaySpeX:

1500 for ADSL2+ or 1492 for fibre.

I was a little uncertain as to what to do; so just wanted to double check.

Yes, but if router is restrictive, your hands are tied. Set it as high as you are allowed, but below the true optimum figure.

In reply to a post by XRaySpeX:

In reply to a post by Jelly_Tussle:

I do remember your earlier advice; but as you also said:

In reply to a post by XRaySpeX:

1500 for ADSL2+ or 1492 for fibre.

I was a little uncertain as to what to do; so just wanted to double check.

Yes, but if router is restrictive, your hands are tied. Set it as high as you are allowed, but below the true optimum figure.

OK; thank you very much.

As I said before I wasn't sure if there would be any negative consequences of inputting a 'incorrect' figure; hence my hesitation.

Once again; I appreciate your help.

Well; I've changed the MTU figure to 1492 and everything seems ok.

In fact; web pages seem to load a little quicker now. It all seems a little snappier than before; so thank you very much!

It does seem a little odd that my TP Link router (which is only a few years old) is not capable of accepting a MTU of 1500 if that is the optimum figure I should be using.

Anyhow; thank you all again for your advice and patience. It is very much appreciated.

In reply to a post by Jelly_Tussle:

As I said before I wasn't sure if there would be any negative consequences of inputting a 'incorrect' figure; hence my hesitation.

The negative consequence of setting an unnecessarily low MTU is a reduction in performance. It is more efficient to send one box of 50 muffins than to send them one by one in 50 jiffy bags (extreme example but you get what I mean).

In reply to a post by Oliver341:

In reply to a post by Jelly_Tussle:

As I said before I wasn't sure if there would be any negative consequences of inputting a 'incorrect' figure; hence my hesitation.

The negative consequence of setting an unnecessarily low MTU is a reduction in performance. It is more efficient to send one box of 50 muffins than to send them one by one in 50 jiffy bags (extreme example but you get what I mean).

Thanks.

I think I appreciate that now. I didn't really understand what MTU was; hence my concern. Things are getting a little clearer now.

I'm very grateful for everyone's contributions.

I have recently looked at my router settings again. As previously mentioned; I changed the MTU figure from 1400 to 1492 after the helpful advice given to me.

The MTU figure seems to have reverted to 1400!

Also; my password and user name details seem to have disappeared!

You may recall earlier in the thread (posts on 13th Feb) I mentioned that my old BT user name and password were not visible. I presume the �disappearance� of my new details is a security measure as Mr Saffron speculated.

I have tried to re-enter 1492 as my new MTU value and reboot the router. However it seems to revert back to 1400

I cannot understand why this should be and whether my router is actually set to 1400 or 1492.

Any ideas?

Thanks.