controller E1 3/0
 channel-group 0 unframed

 

controller E1 3/1

 channel-group 0 unframed

int S3/0:0
 encapsulation ppp
 multilink-group 1

interface Multilink1
 ip add 10.175.61.49 255.255.255.252
 ppp multilink
 no ppp multilink fragmentation
 multilink-group 1

 

int S3/0:1
 encapsulation ppp
 multilink-group 1