Two ce1 links are bundled into a 4 m link. routing can be used for load balancing, for simple static and dynamic operations, you can also buy the second layer of the E1 multipleer, which must be bundled with ppp, the peer routerB can be configured with the same symmetric hostname RouterAusername RouterB password abcip subnet-zeromultilink virtual-template 1! Interface Virtual-Template1ip unnumbered Ethernet0ppp authentication chapppp multilink! Interface Serial0no ip addressencapsulation pppno fair-queueppp multilinkpulse-time 3! Interface Serial1no ip addressencapsulation pppno fair-queueppp multilinkpulse-time 3 through this method, we can combine multiple low-bandwidth lines into one line, data is transmitted through Virtual-Template 1. After configuring this method, we will find that when the port status (sh interface) is displayed, an additional Virtual-Access 1 port is displayed out of thin air, the data traffic on this port is equal to the total traffic on each actual port, and the data traffic is evenly allocated to each actual port. To merge low-bandwidth lines. Note the following When configuring this function: 1. This function can only encapsulate the PPP protocol. 2. In interface virtual-template 1 configuration, ip unnumbered Ethernet0 can be replaced by ip address XXX. 3. You just need to add the physical configuration of ce1. I think it is best to bundle all the channels for e1.