Hi Michael, Looking at the code, to make the MTU stick would require some script changes, but you could test...
After boot edit /tmp/etc/ppp/pppoe.conf You should see something like: PPPD_EXTRA="persist maxfail 0" You should be able to add pppd options to that, something like: PPPD_EXTRA="persist maxfail 0 mtu 1452 mru 1452" (Or try 1460) Then restart PPPoE. (Note 1452 is 1412+40) If that works we could add a rc.conf variable to add the mtu/mru options. Lonnie > On Jun 25, 2020, at 8:56 PM, Michael Knill > <michael.kn...@ipcsolutions.com.au> wrote: > > Thanks Lonnie > > Hmm MSS should be fine then assuming it is working. > I will do some more testing on the new service in my home office. > Unfortunately the one not working is a building site and its way too cold at > the moment. > > Regards > Michael Knill > > On 26/6/20, 11:45 am, "Lonnie Abelbeck" <li...@lonnie.abelbeck.com> wrote: > > > >> On Jun 25, 2020, at 8:05 PM, Michael Knill >> <michael.kn...@ipcsolutions.com.au> wrote: >> >> Hi Group >> >> I have changed my internet provider and I am having connectivity problems to >> some sites on Astlinux. >> I am fairly certain that it is an MTU/MSS issue as I have fixed it on my >> Mikrotik router by adjusting this value. >> Funny that I'm having problems with this provider but not on my previous >> provider. Both are using PPPoE and I tested that the maximum MTU for both is >> 1464 e.g. >> >> 3035-JSainsbury-CM1 kd # fping -M -b 1465 12000.ipcaccess.net >> 12000.ipcaccess.net: error while sending ping: Message too long >> 3035-JSainsbury-CM1 kd # fping -M -b 1464 12000.ipcaccess.net >> 12000.ipcaccess.net is alive >> >> 3076-VisionCF-CM1 kd # fping -M -b 1465 12000.ipcaccess.net >> 12000.ipcaccess.net: error while sending ping: Message too long >> 3076-VisionCF-CM1 kd # fping -M -b 1464 12000.ipcaccess.net >> 12000.ipcaccess.net is alive >> >> Maybe my new provider is not allowing fragmentation? >> >> Anyway just wondering how I fix this problem. Do I just set MTU using IFMTU >> in user.conf? E.g. >> IFMTU=ppp0:1460 > > No, per the /stat/etc/rc.conf file: > -- > ## MTU Changes > ## If you need to specifically set the MTU for a given interface, do that > here. > ## You can try to set the MTU for any valid type of interface. With > ethernet it > ## works most of the time. Everything else, caveat emptor... > ## If you are using PPPoE don't worry. We automatically handle those MTU > issues > #IFMTU="eth2.41:1496 eth0:1492" > -- > > I don't see any configuration for the PPPoE MTU, though there may be a way. > > What is the local MTU set to by default ? > -- > ip link show dev ppp0 > -- > > After the PPPoE link is up you could try to change it: > -- > ip link set dev ppp0 mtu 1460 > -- > > If that works we can try to figure out how to make that stick. > > >> Can I set the TCP MSS anywhere? > > This is the current value hardcoded in the PPPoE config: > > CLAMPMSS=1412 > -- PPPoE docs -- > CLAMPMSS > The value at which to "clamp" the advertised MSS for TCP sessions. The > default of 1412 should be fine. > -- > > Lonnie > > > > > >> >> Regards >> Michael Knill >> _______________________________________________ >> Astlinux-users mailing list >> Astlinux-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/astlinux-users >> >> Donations to support AstLinux are graciously accepted via PayPal to >> pay...@krisk.org. > > > > _______________________________________________ > Astlinux-users mailing list > Astlinux-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/astlinux-users > > Donations to support AstLinux are graciously accepted via PayPal to > pay...@krisk.org. > > > _______________________________________________ > Astlinux-users mailing list > Astlinux-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/astlinux-users > > Donations to support AstLinux are graciously accepted via PayPal to > pay...@krisk.org. _______________________________________________ Astlinux-users mailing list Astlinux-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/astlinux-users Donations to support AstLinux are graciously accepted via PayPal to pay...@krisk.org.
