ESR series service routers.ESR-Series. User manual
                                                                                                   
                                      
In the figure above, PE1 raises two pseudowires: pseudowire 10 to PE2, and pseudowire 20 to PE3 
respectively. For signaling with PE2, the MTU will be set to 2000 (pw-class TO_PE2), for PE3 the MTU will be 
equal to 3000 (pw-class TO_PE3).