1、网络拓扑图
2、属性配置
1）preferred-value（私有属性，本地有效）
peer 2.2.2.2 preferred-value 0-65535//越大越优先
2）local_pref属性：本地优先级
apply local-pref 101//越大越优先
3）as-path
apply as-path 10 20 30 additive
4）Origin的起源
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5)MED属性
apply cost 100
3、详细配置
R1:
[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
#
firewall zone Local
priority 15
#
interface GigabitEthernet0/0/0
ip address 10.1.1.1 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 20.1.1.1 255.255.255.0
#
interface GigabitEthernet0/0/2
ip address 192.168.1.1 255.255.255.0
#
interface NULL0
#
interface LoopBack0
ip address 1.1.1.1 255.255.255.255
#
bgp 1
router-id 1.1.1.1
undo default ipv4-unicast
peer 2.2.2.2 as-number 1
peer 2.2.2.2 connect-interface LoopBack0
peer 3.3.3.3 as-number 1
peer 3.3.3.3 connect-interface LoopBack0
#
ipv4-family unicast
undo synchronization
network 192.168.1.0
peer 2.2.2.2 enable
peer 2.2.2.2 next-hop-local
peer 3.3.3.3 enable
peer 3.3.3.3 next-hop-local
#
ospf 100 router-id 1.1.1.1
area 0.0.0.0
network 1.1.1.1 0.0.0.0
network 10.1.1.0 0.0.0.255
network 20.1.1.0 0.0.0.255
#
user-interface con 0
authentication-mode password
idle-timeout 0 0
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
[r1]
R2:
[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
#
acl number 2001
rule 5 permit source 192.168.2.0 0.0.0.255
rule 10 deny
#
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
#
firewall zone Local
priority 15
#
interface GigabitEthernet0/0/0
ip address 10.1.1.2 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 30.1.1.1 255.255.255.0
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 2.2.2.2 255.255.255.255
#
bgp 1
router-id 2.2.2.2
undo default ipv4-unicast
peer 1.1.1.1 as-number 1
peer 1.1.1.1 connect-interface LoopBack0
peer 3.3.3.3 as-number 1
peer 3.3.3.3 connect-interface LoopBack0
peer 30.1.1.2 as-number 2
#
ipv4-family unicast
undo synchronization
peer 1.1.1.1 enable
peer 1.1.1.1 next-hop-local
peer 3.3.3.3 enable
peer 3.3.3.3 next-hop-local
peer 30.1.1.2 enable
peer 30.1.1.2 route-policy gd import
#
ospf 100 router-id 2.2.2.2
area 0.0.0.0
network 2.2.2.2 0.0.0.0
network 10.1.1.0 0.0.0.255
#
route-policy gd permit node 10
if-match acl 2001
apply as-path 10 20 30 additive
apply local-preference 101
#
user-interface con 0
authentication-mode password
idle-timeout 0 0
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
[r2]
R3：
[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
#
firewall zone Local
priority 15
#
interface GigabitEthernet0/0/0
ip address 20.1.1.2 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 40.1.1.1 255.255.255.0
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 3.3.3.3 255.255.255.255
#
bgp 1
router-id 3.3.3.3
peer 1.1.1.1 as-number 1
peer 1.1.1.1 connect-interface LoopBack0
peer 2.2.2.2 as-number 1
peer 2.2.2.2 connect-interface LoopBack0
peer 40.1.1.2 as-number 2
#
ipv4-family unicast
undo synchronization
peer 1.1.1.1 enable
peer 1.1.1.1 next-hop-local
peer 2.2.2.2 enable
peer 2.2.2.2 next-hop-local
peer 40.1.1.2 enable
#
ospf 100 router-id 3.3.3.3
area 0.0.0.0
network 3.3.3.3 0.0.0.0
network 20.1.1.0 0.0.0.255
#
user-interface con 0
authentication-mode password
idle-timeout 0 0
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
[r3]
R4:
[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
#
firewall zone Local
priority 15
#
interface GigabitEthernet0/0/0
ip address 30.1.1.2 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 40.1.1.2 255.255.255.0
#
interface GigabitEthernet0/0/2
ip address 192.168.2.1 255.255.255.0
#
interface NULL0
#
interface LoopBack0
ip address 4.4.4.4 255.255.255.255
#
bgp 2
router-id 4.4.4.4
undo default ipv4-unicast
peer 30.1.1.1 as-number 1
peer 40.1.1.1 as-number 1
#
ipv4-family unicast
undo synchronization
network 192.168.2.0
peer 30.1.1.1 enable
peer 40.1.1.1 enable
#
ipv6-family unicast
undo synchronization
#
user-interface con 0
authentication-mode password
idle-timeout 0 0
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
[r4]
5、结果
Total Number of Routes: 2
Network NextHop MED LocPrf PrefVal Path/Ogn
*>i 192.168.1.0 1.1.1.1 0 100 0 i
*> 192.168.2.0 30.1.1.2 0 101 0 10 20 30 2
i
[r2]
