Subject: Re: Path MTU discovery
To: None <tech-net@NetBSD.ORG>
From: Jonathan Stone <jonathan@DSG.Stanford.EDU>
Date: 07/15/1997 16:42:23
> Wolfgang> route add -mtu 4096 -net x.x.x.0 myinterface
> Yes, but that isn't the point of PMTU discovery.
> The point is to figure out that there are FDDI networks from A<->B
>and so that *NON-LOCAL* packets can be bigger.
> In any case, the reason I wanted PMTU code (which I understand now
>that FreeBSD has) is because I want to determine if my implementation
>of PMTU ICMP's in an IPsec security gateway works correctly.
PMTU is also useful if you have an Ethernet subnet at home, with a
SLIP or PPP connection configured to a low MTU (256 bytes) for