H3C Routers

CPOS Interface Configuration Examples

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Contents

Introduction· 1

Prerequisites· 1

Example: Aggregating E1 links by using a CPOS interface· 1

Network configuration· 1

Software versions used· 1

Restrictions and guidelines· 2

Procedures· 2

Verifying the configuration· 3

Configuration files· 5

Related documentation· 6

 

Introduction

The following information provides configuration examples for aggregating E1 links by using a channelized POS (CPOS) interface.

Prerequisites

The configuration examples were created and verified in a lab environment, and all the devices were started with the factory default configuration. When you are working on a live network, make sure you understand the potential impact of every command on your network.

The following information is provided based on the assumption that you have basic knowledge of CPOS, E1, and multilink PPP (MP).

Example: Aggregating E1 links by using a CPOS interface

Network configuration

Router A, as the central node, has seven branch nodes including routers B through H. Each branch device uplinks to Router A through an E1 link. Router A aggregates the uplinks through a CPOS interface. Recently, due to an increase in the number of access users on Router B, the bandwidth requirement has increased. One E1 link cannot meet the requirement, so one more E1 link is added. Bundle these two E1 links by using an MP-group interface.

Figure 1 Network diagram

 

Software versions used

This configuration example was created and verified on R9141P16 of the SR6602-I device.

Restrictions and guidelines

When the device is connected to a SONET/SDH device, make sure the master clock mode is configured on the SONET/SDH device, because its clock precision is higher than that of the internal clock source of the device.

Procedures

1.     Configure Router A:

# Configure the E1 channels of the CPOS interface to operate in unframed mode.

<RouterA> system-view

[RouterA] controller cpos 2/2/1

[RouterA-Cpos2/2/1] e1 1 unframed

[RouterA-Cpos2/2/1] e1 2 unframed

[RouterA-Cpos2/2/1] quit

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

[RouterA] interface mp-group 2/2/1

[RouterA-Mp-group2/2/1] ip address 10.1.1.1 24

[RouterA-Mp-group2/2/1] quit

# Configure logical serial interfaces Serial 2/2/1/1:0 and Serial 2/2/1/2:0 for the two E1 links that connect to Router B.

[RouterA] interface serial2/2/1/1:0

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

[RouterA-Serial2/2/1/1:0] quit

[RouterA] interface serial2/2/1/2:0

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

[RouterA-Serial2/2/1/2:0] quit

2.     Configure Router B:

# Configure CE1 interface E1 2/2/1 to operate in E1 mode.

<RouterB> system-view

[RouterB] controller e1 2/2/1

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

[RouterB-E1 2/2/1] quit

# Configure CE1 interface 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 an MP-group interface.

[RouterB] interface mp-group 2/2/1

[RouterB-Mp-group2/2/1] ip address 10.1.1.2 24

[RouterB-Mp-group2/2/1] quit

# Configure logical serial interfaces Serial 2/2/1:0 and Serial 2/1/2:0 for two E1 links.

[RouterB] interface serial2/2/1:0

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

[RouterB-Serial2/2/1:0] quit

[RouterB] interface serial2/1/2:0

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

[RouterB-Serial2/1/2:0] quit

Verifying the configuration

1.     Identify whether the MP-group interfaces of Router A and Router B can communicate with each other.

# Check the MP-group interface on Router A.

[RouterA] ping 10.1.1.2

Ping 10.1.1.2 (10.1.1.2): 56 data bytes, press CTRL_C to break

56 bytes from 10.1.1.2: icmp_seq=0 ttl=255 time=32.998 ms

56 bytes from 10.1.1.2: icmp_seq=1 ttl=255 time=27.632 ms

56 bytes from 10.1.1.2: icmp_seq=2 ttl=255 time=34.517 ms

56 bytes from 10.1.1.2: icmp_seq=3 ttl=255 time=45.058 ms

56 bytes from 10.1.1.2: icmp_seq=4 ttl=255 time=35.121 ms

 

--- Ping statistics for 10.1.1.2 ---

5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss

round-trip min/avg/max/std-dev = 27.632/35.065/45.058/5.651 ms

# Check the MP-group interface on Router B.

[RouterB] ping 10.1.1.1

Ping 10.1.1.1 (10.1.1.1): 56 data bytes, press CTRL_C to break

56 bytes from 10.1.1.1: icmp_seq=0 ttl=255 time=27.877 ms

56 bytes from 10.1.1.1: icmp_seq=1 ttl=255 time=27.616 ms

56 bytes from 10.1.1.1: icmp_seq=2 ttl=255 time=42.308 ms

56 bytes from 10.1.1.1: icmp_seq=3 ttl=255 time=36.238 ms

56 bytes from 10.1.1.1: icmp_seq=4 ttl=255 time=71.639 ms

 

--- Ping statistics for 10.1.1.1 ---

5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss

round-trip min/avg/max/std-dev = 27.616/41.136/71.639/16.214 ms

2.     Display the details of the MP-group interfaces on Router A and Router B, and view the state of the MP-group interfaces.

# Display the details for the MP-group interface on Router A.

[RouterA] display interface mp-group 2/2/1

MP-group2/2/1

Current state: UP

Line protocol state: UP

Description: MP-group2/2/1 Interface

Bandwidth: 1024kbps

Maximum Transmit Unit: 1500

Hold timer: 10 seconds, retry times: 5

Internet Address is 10.1.1.1/24 (primary)

Link layer protocol: PPP

LCP: opened, MP: opened, IPCP: opened, OSICP: opened, MPLSCP: opened, IPv6CP: op

ened

Physical: MP, baudrate: 1024000 bps

Output queue - Urgent queuing: Size/Length/Discards 0/100/0

Output queue - Protocol queuing: Size/Length/Discards 0/500/0

Output queue - FIFO queuing: Size/Length/Discards 0/75/0

Last link flapping: Never

Last clearing of counters: Never

Last 300 seconds input rate: 0 bytes/sec, 0 packets/sec

Last 300 seconds output rate: 0 bytes/sec, 0 packets/sec

Input: 0 packets, 0 bytes, 0 drops

Output: 0 packets, 0 bytes, 0 drops

# Display the details for the MP-group interface on Router B.

[RouterB] display interface mp-group 2/2/1

MP-group2/2/1

Current state: UP

Line protocol state: UP

Description: MP-group2/2/1 Interface

Bandwidth: 1024kbps

Maximum Transmit Unit: 1500

Hold timer: 10 seconds, retry times: 5

Internet Address is 10.1.1.2/24 (primary)

Link layer protocol: PPP

LCP: opened, MP: opened, IPCP: opened, OSICP: opened, MPLSCP: opened, IPv6CP: opened

Physical: MP, baudrate: 1024000 bps

Output queue - Urgent queuing: Size/Length/Discards 0/100/0

Output queue - Protocol queuing: Size/Length/Discards 0/500/0

Output queue - FIFO queuing: Size/Length/Discards 0/75/0

Last link flapping: Never

Last clearing of counters: Never

Last 300 seconds input rate: 0 bytes/sec, 0 packets/sec

Last 300 seconds output rate: 0 bytes/sec, 0 packets/sec

Input: 0 packets, 0 bytes, 0 drops

Output: 0 packets, 0 bytes, 0 drops

The information above indicates that the MP-group interfaces of Router A and Router B are both UP and can communicate normally.

3.     Check the details of MP on Router A and Router B, and verify that the MP configuration for MP-group 1 is correct.

# Display MP details on Router A.

[RouterA] display ppp mp interface mp-group 2/2/1

Template: MP-group2/2/1

max-bind: 16, fragment: enabled, min-fragment: 128

  Master link: MP-group2/2/1, Active members: 2, Bundle Multilink

  Peer's endPoint descriptor: MP-group2/2/1

  Sequence format: long (rcv)/long (sent)

  Bundle Up Time: 2017/07/25  09:16:07:745

  0 lost fragments, 0 reordered, 0 unassigned, 0 interleaved

  Sequence: 0 (rcv)/0 (sent)

  Active member channels: 16 members

        Serial2/2/1/1:0           Up-Time:2017/07/25  09:16:07:747

        Serial2/2/1/2:0           Up-Time:2017/07/25  09:16:07:746

# Display MP details on Router B.

[RouterB] display ppp mp interface mp-group 2/2/1

Template: MP-group2/2/1

max-bind: 16, fragment: enabled, min-fragment: 128

  Master link: MP-group2/2/1, Active members: 2, Bundle Multilink

  Peer's endPoint descriptor: MP-group2/2/1

  Sequence format: long (rcv)/long (sent)

  Bundle Up Time: 2017/07/25  09:16:07:745

  0 lost fragments, 0 reordered, 0 unassigned, 0 interleaved

  Sequence: 0 (rcv)/0 (sent)

  Active member channels: 16 members

        Serial2/2/1:0              Up-Time:2017/07/25  09:16:07:747

        Serial2/1/2:0              Up-Time:2017/07/25  09:16:07:746

The information above indicates that the MP-group configuration of Router A and Router B is correct and Router A and Rotuer B can communicate normally.

Configuration files

·     Router A:

#

controller cpos 2/2/1

 e1 1 unframed

 e1 2 unframed

#

interface mp-group 2/2/1

 ip address 10.1.1.1 24

#

interface serial2/2/1/1:0

 ppp mp mp-group 2/2/1

#

interface serial2/2/1/2:0

 ppp mp mp-group 2/2/1

#

·     Router B:

#

controller e1 2/2/1

 using e1

#

controller e1 2/1/2

 using e1

#

interface mp-group 2/2/1

 ip address 10.1.1.2 24

#

interface serial2/2/1:0

 ppp mp mp-group 2/2/1

#

interface serial2/1/2:0

 ppp mp mp-group 2/2/1

#

Related documentation

·     H3C SR6602-I[IE] AI-Powered ICT Converged Gateways Configuration Guides(V9)

·     H3C SR6602-I[IE] AI-Powered ICT Converged Gateways Command References(V9)