R2511-HP MSR Router Series Interface Configuration Guide(V5)

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

[RouterA-Serial2/0/2:0] quit

2. Configure Router B:

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

<RouterB> system-view

[RouterB] controller e1 2/1

[RouterB-E1 2/1] using e1

[RouterB-E1 2/1] quit

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

[RouterB] controller e1 2/2

[RouterB-E1 2/2] using e1

[RouterB-E1 2/2] quit

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

[RouterB] interface mp-group 1

[RouterB-Mp-group1] ip address 10.1.1.2 24

[RouterB-Mp-group1] quit

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

[RouterB] interface serial2/0/1:0

[RouterB-Serial2/0/1:0] ppp mp mp-group 1

[RouterB-Serial2/0/1:0] quit

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

[RouterB] interface serial2/0/2:0

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

[RouterB-Serial2/0/2:0] quit

3. Configure other branch nodes in the same way Router B is configured. (Details not shown.)

Verifying the configuration

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

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

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

<RouterB> display interface mp-group 1

<RouterB> display interface display ppp mp

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

Troubleshooting CPOS interfaces

Interface physical status is UP, link protocol status is down, and

loopback is detected

Symptom

The HP router is connected to another vendor's router through E1 channels on CPOS interfaces across an

SDH network. PPP is used on the serial interface created for the E1 channel set.

The output from the display interface serial command shows the following errors: