H3C MSR3600 12500R Switch Router Series Instructions

The configuration examples in this document 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.
This document assumes that you have basic knowledge of IS-IS route summarization.

Network configuration

As shown in Figure 1, the five departments of a company use IS-IS to connect to the backbone network. The five departments are assigned the networks 192.168.1.0/24, 192.168.2.0/24, 192.168.3.0/24, 192.168.4.0/24, and 192.168.5.0/24. Configure IS-IS route summarization to reduce routing entries and save system resources for Device B.

Figure 1 Network diagram

Table 1 Interface and IP address assignment

Analysis

Configure route summarization on Device A because route summarization applies only to locally generated LSPs. To avoid blackhole routes, set the summary route to 192.168.0.0/22.

Software versions used

This configuration example was created and verified on Release 3606.

Restrictions and guidelines

By default, interfaces on the device are disabled (in ADM or Administratively Down state). To have an interface operate, you must use the undo shutdown command to enable that interface.

Procedures

Configuring IP addresses for interfaces

# Configure an IP address for the interface HundredGigE 1/0/1 on Device A.
<DeviceA> system-view
[DeviceA] interface hundredgige 1/0/1
[DeviceA-HundredGigE1/0/1] ip address 172.16.1.1 24
[DeviceA-HundredGigE1/0/1] undo shutdown
[DeviceA-HundredGigE1/0/1] quit
# Configure IP addresses for other interfaces as shown in Figure 1 in the same way HundredGigE 1/0/1 is configured. (Details not shown.)

Configuring basic IS-IS

Configuring Device A

# Enable IS-IS on Device A and configure Device A as a Level-1-2 router.
[DeviceA] isis 1
[DeviceA-isis-1] network-entity 10.0000.0000.0001.00
[DeviceA-isis-1] is-level level-1-2
[DeviceA-isis-1] quit
# Enable IS-IS on the interface HundredGigE 1/0/1.
[DeviceA] interface hundredgige 1/0/1
[DeviceA–HundredGigE1/0/1] isis enable 1
[DeviceA–HundredGigE1/0/1] quit
# Configure other interfaces in the same way HundredGigE 1/0/1 is configured. (Details not shown.)

Configuring Device B

# Enable IS-IS on Device B and configure Device B as a Level-2 router. [DeviceB] isis 1
[DeviceB-isis-1] network-entity 10.0000.0000.0002.00
[DeviceB-isis-1] is-level level-2
[DeviceB-isis-1] quit
# Enable IS-IS on the interface HundredGigE 1/0/1.
[DeviceB] interface hundredgige 1/0/1
[DeviceB–HundredGigE1/0/1] isis enable 1 [DeviceB–HundredGigE1/0/1] quit

Configuring the gateways

# Enable IS-IS on GW 1 and configure GW 1 as a Level-1 router.
[GW1] isis 1
[GW1-isis-1] network-entity 10.0001.0001.0001.00
[GW1-isis-1] is-level level-1
[GW1-isis-1] quit
# Enable IS-IS on the interface HundredGigE 1/0/1.
[GW1] interface hundredgige 1/0/1
[GW1–HundredGigE1/0/1] isis enable 1
[GW1–HundredGigE1/0/1] quit
# Configure other gateways in the same way GW 1 is configured. (Details not shown.)

Displaying IS-IS routing information on Device B

# Display IS-IS routing information on Device B to view the network address of each department.
[DeviceB] display isis route