with the configuration below the mtu is configured to 1484 and can be verified with show interface.
(1484 is the maximum mtu size for this internet connection)
When a reload or a "clear pppoe all" is done then the router configuration changes to 1500.
This is not a wanted behaviour and causes connection issues.
Is that a bug? Hints are welcome :)
IOS Version: isr4300-universalk9.16.06.04.SPA.bin
interface GigabitEthernet0/0/0
description ISP
no ip address
no ip redirects
no ip proxy-arp
negotiation auto
pppoe enable group global
no cdp enable
pppoe-client dial-pool-number 1
ip virtual-reassembly
interface Dialer0
description PPPoE - Modem
mtu 1484
ip address negotiated
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat outside
encapsulation ppp
ip tcp adjust-mss 1444
dialer pool 1
dialer-group 1
no cdp enable
ppp authentication chap callin
ppp chap hostname *****
ppp chap password *****
Rgds
Marcus
