[rbak-nsp] reduce MTU in subscriber default / radius

[Yuri Shefer]

Hi,

How did you checked the Framed-MTU? Under the session it should be applied
as "ppp mtu".

subscriber at context1
        Session state Up
        Circuit   lg id 5 vlan-id 223:32 pppoe 1
        Internal Circuit   255/36:1:6/3/2/14014
        Interface bound loopback3
        Current port-limit unlimited
        Session time left 85976
        Protocol Stack IPV4
        context-name local (not applied)
        profile V4_RESIDENTIAL (applied)
>>>>>        ppp mtu 1400 (applied)
        ip pool  (applied from sub_profile)
        ip source-validation 1 (applied from sub_profile)
        ip address 192.168.12.199 (applied from pool)
        timeout absolute 86400 (applied)
        timeout idle 7200 (applied)
        qos-policing-policy policy (applied)
        qos-metering-policy metering (applied)


On Tue, Jan 29, 2013 at 12:47 AM, Florian Lohoff <f at zz.de> wrote:

>
> Hi,
> i am terminating PPPoE Subscribers on a Bunch of SE600 which simply
> works. Subscriber default contains a ppp mtu 1492.
>
> Now i have a link to the lab with a reduced MTU which i cant fix
> easily so i'd need to reduce the MTU to be able to reach tr069 etc.
>
> I tried with a dot1q profile with ppp mru 1400 (and removing the ppp mtu
> 1492 from subscriber default) which does not work.
>
> The simple RADIUS way by using a Framed-MTU does not work either which
> is obvious as the RADIUS Auth Req is sent in Auth Phase when the MTU
> has already been negotiated. The only way would be to fall back to
> Configure Phase with a ConfReq in Auth Phase. Is there a RADIUS Packet
> to trigger this?
>
> Otherwise the only solution would be a another context or does anyone
> have another idea?
>
> Flo
> PS: Why on earth does the SE not support multiple subscriber "defaults"
> which can be addressed from the dot1q config.
> --
> Florian Lohoff                                                 f at zz.de
>
>
-- 
Best regards,
Yuri
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