Dear Experts ,
The ADSL Modem CISCO867-K9 is not connecting to our NAS router with default mtu value in the NAS router virtual template
Is there is any reason for ths ? With the below settings my ADSL 867 connecting , but if i remove the (mtu 1440 and ip tcp adjust-mss 1392 , this modem is not connecting
My Virtual Template config
interface Virtual-Template1
mtu 1440
ip unnumbered Loopback3
ip tcp adjust-mss 1392
no logging event link-status
peer default ip address pool test
ppp authentication pap
ppp ipcp address required
ppp multilink
Cisco CISCO867-K9 Dialer interface config
interface Dialer1
ip address negotiated
ip mtu 1440
ip nat outside
ip virtual-reassembly
encapsulation ppp
ip tcp adjust-mss 1392
dialer pool 1
dialer remote-name redback
dialer-group 1
ppp authentication pap chap callin
ppp chap hostname testmtu
ppp chap password 0 test32
ppp chap refuse
ppp pap sent-username testmtu password 0 test32
ppp ipcp dns request
ppp ipcp wins request
