Re: The problem with MTU <1500

2012-03-26 Thread Andrey Zonov
On 27.03.2012 0:06, Andrey Zonov wrote: On 26.03.2012 17:43, Владислав Продан wrote: Dear all! I have two different values of uplink MTU - 1440 and 1492. And in a local network - 1500. In Cisco routers can be set 'set ip df 0', but I have no such router :( What options are there for FreeBSD?

Re: The problem with MTU <1500

2012-03-26 Thread Andrey Zonov
On 26.03.2012 17:43, Владислав Продан wrote: Dear all! I have two different values of uplink MTU - 1440 and 1492. And in a local network - 1500. In Cisco routers can be set 'set ip df 0', but I have no such router :( What options are there for FreeBSD? sysctl net.inet.tcp.path_mtu_discovery=0

Re: The problem with MTU <1500

2012-03-26 Thread Вадим Уразаев
You may use this patch to ipfw http://www.freebsd.org/cgi/query-pr.cgi?pr=103454 Or you may use ng_patch netgraph node (man ng_patch(4) should give you some examples) The simpliest way to do what you want is pf rule scrub in on em0 no-df performance of all those methods you should check by youre

Re: The problem with MTU <1500

2012-03-26 Thread Michael Sierchio
2012/3/26 Владислав Продан > > Dear all! > I have two different values of uplink MTU - 1440 and 1492. > And in a local network - 1500. > In Cisco routers can be set 'set ip df 0', but I have no such router :( > What options are there for FreeBSD? > man ifconfig - not the 'mtu' option. You shou

The problem with MTU <1500

2012-03-26 Thread Владислав Продан
Dear all! I have two different values of uplink MTU - 1440 and 1492. And in a local network - 1500. In Cisco routers can be set 'set ip df 0', but I have no such router :( What options are there for FreeBSD? Only use the net/tcpmssd? Will it be possible to process both two channels of 1Gb? -- V