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Unifi UniFi PPPoE Dialer MTU affects IP assignment. Why?

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NyOx
post Feb 27 2017, 07:33 AM

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QUOTE(soonwai @ Feb 25 2017, 03:09 AM)
I have a friend subscribing to UniFiBiz 5 Static IPs.

If I configure the PPPoE dialer with MTU and MRU as 1492, she gets her correct /29 static IPs.

If I configure the PPPoE dialer with no MTU nor MRU set, she gets a dynamic IP. The MTU eventually ends up as 1480

Anyone know why that is?
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i think as long as below 1500 should be fine. MTU just a frame size. as far i know TM MTU max 1500.

i already play around MTU for my unifi and max MTU size can be configure 1492.
NyOx
post Feb 27 2017, 11:23 AM

On my way
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Senior Member
585 posts

Joined: Nov 2007
QUOTE(soonwai @ Feb 27 2017, 09:20 AM)
I know right. So wierd. Why does TM's pppoe server react differently just because the pppoe client is dialing with a different MTU and MRU size?
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it might cause by auth server dialer. but why i dont have answer. hehehehe
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