CPOS-E1 interface configuration example

As shown in Figure 6, branch nodes Router B through Router H are uplinked to the central node Router A through E1 links. Router A aggregates these E1 links by using a CPOS interface.

Add one additional E1 link on Router B to expand its capacity, and use an MP-group interface to bind the two E1 links.

	IMPORTANT: For correct network synchronization, make sure the master clock mode is configured on the SONET/SDH devices connected to the routers.

1. Configure Router A:

   # Configure E1 channels 1 and 2 of CPOS 2/1/1 to operate in unframed mode.

   <RouterA> system-view
   [RouterA] controller cpos 2/1/1
   [RouterA-Cpos2/1/1] e1 1 unframed
   [RouterA-Cpos2/1/1] e1 2 unframed
   

   # Create MP-group 1 and assign an IP address to it.

   [RouterA] interface mp-group 2/1/1
   [RouterA-Mp-group2/1/1] ip address 10.1.1.1 24
   [RouterA-Mp-group2/1/1] quit
   

   # Assign Serial 2/1/1/1:0 to MP-group 2/1/1.

   [RouterA] interface serial2/1/1/1:0
   [RouterA-Serial2/1/1/1:0] ppp mp mp-group 2/1/1
   [RouterA-Serial2/1/1/1:0] quit
   

   # Assign Serial 2/1/1/2:0 to MP-group 2/1/1.

   [RouterA] interface serial2/1/1/2:0
   [RouterA-Serial2/1/1/2:0] ppp mp mp-group 2/1/1
   [RouterA-Serial2/1/1/2:0] quit
   

2. Configure Router B:

   # Configure E1 2/1/1 to operate in E1 mode.

   <RouterB> system-view
   [RouterB] controller e1 2/1/1
   [RouterB-E1 2/1/1] using e1
   [RouterB-E1 2/1/1] quit
   

   # Configure E1 2/1/2 to operate in E1 mode.

   [RouterB] controller e1 2/1/2
   [RouterB-E1 2/1/2] using e1
   [RouterB-E1 2/1/2] quit
   

   # Create MP-group 2/1/1 and assign an IP address to it.

   [RouterB] interface mp-group 2/1/1
   [RouterB-Mp-group2/1/1] ip address 10.1.1.2 24
   [RouterB-Mp-group2/1/1] quit
   

   # Assign Serial 2/1/1:0 to MP-group 2/1/1.

   [RouterB] interface serial2/1/1:0
   [RouterB-Serial2/1/1:0] ppp mp mp-group 2/1/1
   [RouterB-Serial2/1/1:0] quit
   

   # Assign Serial 2/1/2:0 to MP-group 2/1/1.

   [RouterB] interface serial2/1/2:0
   [RouterB-Serial2/1/2:0] ppp mp mp-group 2/1/1
   [RouterB-Serial2/1/2:0] quit
   

# Verify the serial interface configuration and state, for example, on Router B.

<RouterB> display interface serial 2/1/1:0

# Verify the MP interface, and MP bundle configuration and state, for example, on Router B.

<RouterB> display interface mp-group 2/1/1
<RouterB> display interface display ppp mp

# Verify that the routers can ping one another. (Details not shown.)