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Category:Incoming L2TP: Difference between revisions
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=== MTU ===
You may have to set a lower MTU to accommodate the host ISP, possibly as low as 1462 (or lower for some ISPs and still lower for mobile networks). In theory fragments will work to allow 1500 MTU on our service, but fragments are inefficient, and if everyone sends fragmented packets that could degrade the service.▼
{| class="wikitable"
|+ Rough guide for MTU for L2TP
|-
! ISP's Type !! ISP MTU !! L2TP MYU
|-
| Most broadband providers || 1492 || 1454
|-
| Broadband using Ethernet or baby jumbo frames RFC4638 || 1500 || 1462
|-
| Mobile or other || lower than 1492 || Lower than 1454
|}
* To find out the MTU of your underlying internet connection, see out [[MTU|MTU Page]]
* Generally, the L2TP MTU would be 38 bytes less than the MTU you have on the underlying internet connection.
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=== Port forwarding on some 'Mobile Broadband' routers ===
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