1、设计
AR1为level-1
AR2为level-1-2
AR3、AR4为level-2
2、修改路由计算开销方式
NARROW模式（设备默认模式开销都是10，手工配置开销取值范围1-63）
WIDE模式（设备默认模式开销都是10，手工配置开销取值范围1-16777215）
进程下加入AUTO-COST enable命令，NARROW模式和WIDE模式都会参考接口带宽大小计算开销值
配置命令为：
isis 100
cost-style wide
network-entity 49.0001.0020.0200.2002.00
#
3、修改dis的优先级
接口的优先级
配置命令为：
#
interface GigabitEthernet0/0/0
ip address 30.1.1.2 255.255.255.0
isis enable 100
isis dis-priority 80
#
4、完整配置如下：
<r1>display current-configuration
[V200R003C00]
#
sysname r1
#
snmp-agent local-engineid 800007DB03000000000000
snmp-agent
#
clock timezone China-Standard-Time minus 08:00:00
#
portal local-server load portalpage.zip
#
drop illegal-mac alarm
#
set cpu-usage threshold 80 restore 75
#
aaa
authentication-scheme default
authorization-scheme default
accounting-scheme default
domain default
domain default_admin
local-user admin password cipher %$%$K8m.Nt84DZ}e#<0`8bmE3Uw}%$%$
local-user admin service-type http
#
isis 100
is-level level-1
cost-style wide
network-entity 49.0001.0010.0100.1001.00
#
firewall zone Local
priority 15
#
interface GigabitEthernet0/0/0
ip address 10.1.1.1 255.255.255.0
isis enable 100
isis dis-priority 80
#
interface GigabitEthernet0/0/1
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 1.1.1.1 255.255.255.255
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
<r1>
<r2>display current-configuration
[V200R003C00]
#
sysname r2
#
snmp-agent local-engineid 800007DB03000000000000
snmp-agent
#
clock timezone China-Standard-Time minus 08:00:00
#
portal local-server load portalpage.zip
#
drop illegal-mac alarm
#
set cpu-usage threshold 80 restore 75
#
aaa
authentication-scheme default
authorization-scheme default
accounting-scheme default
domain default
domain default_admin
local-user admin password cipher %$%$K8m.Nt84DZ}e#<0`8bmE3Uw}%$%$
local-user admin service-type http
#
isis 100
cost-style wide
network-entity 49.0001.0020.0200.2002.00
#
firewall zone Local
priority 15
#
interface GigabitEthernet0/0/0
ip address 10.1.1.2 255.255.255.0
isis enable 100
#
interface GigabitEthernet0/0/1
ip address 20.1.1.1 255.255.255.0
isis enable 100
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 2.2.2.2 255.255.255.255
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
<r2>
<r3>display current-configuration
[V200R003C00]
#
sysname r3
#
snmp-agent local-engineid 800007DB03000000000000
snmp-agent
#
clock timezone China-Standard-Time minus 08:00:00
#
portal local-server load portalpage.zip
#
drop illegal-mac alarm
#
set cpu-usage threshold 80 restore 75
#
aaa
authentication-scheme default
authorization-scheme default
accounting-scheme default
domain default
domain default_admin
local-user admin password cipher %$%$K8m.Nt84DZ}e#<0`8bmE3Uw}%$%$
local-user admin service-type http
#
isis 100
is-level level-2
cost-style wide
network-entity 49.0002.0030.0300.3003.00
#
firewall zone Local
priority 15
#
interface GigabitEthernet0/0/0
ip address 30.1.1.1 255.255.255.0
isis enable 100
#
interface GigabitEthernet0/0/1
ip address 20.1.1.2 255.255.255.0
isis enable 100
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 3.3.3.3 255.255.255.255
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
<r3>
<r4>display current-configuration
[V200R003C00]
#
sysname r4
#
snmp-agent local-engineid 800007DB03000000000000
snmp-agent
#
clock timezone China-Standard-Time minus 08:00:00
#
portal local-server load portalpage.zip
#
drop illegal-mac alarm
#
set cpu-usage threshold 80 restore 75
#
aaa
authentication-scheme default
authorization-scheme default
accounting-scheme default
domain default
domain default_admin
local-user admin password cipher %$%$K8m.Nt84DZ}e#<0`8bmE3Uw}%$%$
local-user admin service-type http
#
isis 100
is-level level-2
cost-style wide
network-entity 49.0002.0040.0400.4004.00
#
firewall zone Local
priority 15
#
interface GigabitEthernet0/0/0
ip address 30.1.1.2 255.255.255.0
isis enable 100
isis dis-priority 80
#
interface GigabitEthernet0/0/1
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 4.4.4.4 255.255.255.255
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
<r4>
