Huawei Quidway NetEngine80E Configuration Manual page 531

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
Procedure
l
Issue 02 (2014-09-30)
Create an IS-IS process and configure the NET of a device.
1. Run:
system-view
The system view is displayed.
2. Run:
isis [ process-id ]
An IS-IS process is created, and the IS-IS process view is displayed.
The process-id parameter specifies the ID of an IS-IS process. The default value of
process-id is 1. To associate an IS-IS process with a VPN instance, run the isis process-
id vpn-instance vpn-instance-name command.
3. Run:
network-entity net
or
network-entity area area-id auto-systemid lsr-id
A NET is configured.
NET of IS-IS consists of three parts:
– Part one is the area ID that is variable (1 to 13 bytes), and the area IDs of the devices
in the same area are identical.
– Part two is the system ID (6 bytes) of this device, which must be unique in the
whole area and backbone area.
– Part three is the last byte "SEL", whose value must be "00".
For example, the NET of IS-IS device can be configured as 10.1234.6e9f.0001.00.
NOTICE
l An area ID is used to uniquely identify an area in the same IS-IS domain. All
routers in the same Level-1 area must share the same area ID, while routers in the
same Level-2 area can have different area IDs.
l The system ID must be unique in the whole area and backbone area.
l A maximum of three area IDs can be configured for an IS-IS process. Therefore,
a maximum of three NETs can be configured. When configuring multiple NETs,
ensure that they share the same system ID.
Configuring loopback interface addresses based on NETs is recommended to ensures
that a NET is unique on the network. If NETs are not unique, route flapping will easily
occur.
System ID used in IS-IS can be obtained in the following way: extend each part of the
IP address to 3 bits, add 0 to the front of any part that is shorter than 3 bits, divide the
extended address into three parts, with each part consisting of four decimal digits, and
the reconstructed address is the system ID.
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