The interface is configured to automatically calculate its cost.
The configuration of the bandwidth reference value takes effect only when the cost type is
wide or wide-compatible. In this case, Cost of each interface = (Value of bandwidth-
reference/Interface bandwidth) x 10.
If the cost-style is narrow, narrow-compatible, or compatible, the cost of each interface is
based on costs listed in Table 6-2.
Table 6-2 Mapping between IS-IS interface costs and interface bandwidth
Cost Bandwidth Range
60
Interface bandwidth ≤ 10 Mbit/s
50
10 Mbit/s < interface bandwidth ≤ 100 Mbit/
s
40
100 Mbit/s < interface bandwidth ≤ 155 Mbit/
s
30
155 Mbit/s < interface bandwidth ≤ 622 Mbit/
s
20
622 Mbit/s < Interface bandwidth ≤ 2.5 Gbit/
s
10 Interface bandwidth > 2.5 Gbit/s
NOTE
To change the cost of a loopback interface, run the isis ipv6 cost command only in the loopback
interface view.
----End
6.11.5 (Optional) Configuring IPv6 IS-IS Attributes for Interfaces
on Different Types of Networks
Different IS-IS attributes can be configured for different types of network interfaces.
Context
The establishment modes of IS-IS neighbor relationships are different on a broadcast network
and on a P2P network. Different IS-IS attributes can be configured for interfaces on different
types of networks.
IS-IS is required to select a DIS on a broadcast network. Configure the DIS priorities of IS-IS
interfaces so that the interface with the highest priority will be selected as the DIS.
The network types of the IS-IS interfaces on both ends of a link must be the same; otherwise,
the IS-IS neighbor relationship cannot be established between the two interfaces. For example,
if the type of an interface on a peer device is P2P, you can configure the type of an interface on
the local device to P2P so that an IS-IS neighbor relationship can be established between the
two devices.
S6700 Series Ethernet Switches
Configuration Guide - IP Routing 6 IS-IS Configuration
Issue 01 (2012-03-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
291
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