ensp-BGP
BGP:边界网关路由协议:boder gateway protocol特点:① 属于外部网关路由协议② 针对大型网络、大型跨国集团、运营商、国与国之间的路由路由协议分类内部网关路由协议IGP:rip ospf isis (eigrp) 外部网关路由协议EGP:EGP(早期淘汰)BGPBGP 邻居关系:IBGP :相同的AS路由器邻居EBGP:不同AS的路由器邻居注:EBGP 建邻居用直连接口 IB
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BGP:边界网关路由协议:boder gateway protocol
特点:
① 属于外部网关路由协议
② 针对大型网络、大型跨国集团、运营商、国与国之间的路由
路由协议分类
内部网关路由协议IGP:rip ospf isis (eigrp)
外部网关路由协议EGP:EGP(早期淘汰)BGP
BGP 邻居关系:
IBGP
:相同的AS路由器邻居
EBGP
:不同AS的路由器邻居
注:EBGP
建邻居用直连接口 IBGP
建邻居用环回接口
bgp 路由传递:
BGP next-hop 属性
BGP 是以AS为个体,路由传递给其EBGP对等体时,下一跳会不变的引入AS的内部。 可能会引起下一跳不可达问题
解决:
R2:
bgp 200 peer 3.3.3.3 next-hop-local
路由传递给邻居3.3.3.3时将 路由的下一跳改为自己(2.2.2.2) 202 IBGP 水平分割属性:为了防止IBGP环路,默认情况下从IBGP对等体收到的路由不会传给其IBGP邻居。
解决水平分割:配置路由反射器 R3:
bgp 200 peer 4.4.4.4 reflect-client #
将R4配置为自己的路由反射客户 端
注:从客户端(路由反射客户端)学到的路由可以无条件传递给任何对等体。
全网互通、路由引入、BGP 的路由汇总
BGP AS-path 属性
EBGP 防环:As-path 属性
IBGP 防环:ibgp 水平分割
路由聚合的AS-set 参数
注:一台路由器上面只能运行一个bgp 的进程。
详细命令
AR1
#
sysname AR1
#
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
#
router id 1.1.1.1
#
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 12.1.1.1 255.255.255.0
#
interface GigabitEthernet0/0/1
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 1.1.1.1 255.255.255.0
#
interface LoopBack1
ip address 1.1.2.1 255.255.255.0
#
interface LoopBack2
ip address 1.1.3.1 255.255.255.0
#
bgp 100
peer 12.1.1.2 as-number 200
#
ipv4-family unicast
undo synchronization
aggregate 1.1.0.0 255.255.252.0 detail-suppressed
network 1.1.1.0 255.255.255.0
network 1.1.2.0 255.255.255.0
network 1.1.3.0 255.255.255.0
network 12.1.1.0 255.255.255.0
peer 12.1.1.2 enable
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
AR2
#
sysname AR2
#
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
#
router id 2.2.2.2
#
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 12.1.1.2 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 23.1.1.2 255.255.255.0
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 2.2.2.2 255.255.255.0
#
bgp 200
peer 3.3.3.3 as-number 200
peer 3.3.3.3 connect-interface LoopBack0
peer 12.1.1.1 as-number 100
#
ipv4-family unicast
undo synchronization
network 12.1.1.0 255.255.255.0
import-route ospf 1
peer 3.3.3.3 enable
peer 3.3.3.3 next-hop-local
peer 12.1.1.1 enable
#
ospf 1
area 0.0.0.0
network 2.2.2.0 0.0.0.255
network 23.1.1.0 0.0.0.255
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
AR3
#
sysname AR3
#
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
#
router id 3.3.3.3
#
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 23.1.1.3 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 34.1.1.3 255.255.255.0
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 3.3.3.3 255.255.255.0
#
bgp 200
peer 2.2.2.2 as-number 200
peer 2.2.2.2 connect-interface LoopBack0
peer 4.4.4.4 as-number 200
peer 4.4.4.4 connect-interface LoopBack0
#
ipv4-family unicast
undo synchronization
peer 2.2.2.2 enable
peer 4.4.4.4 enable
peer 4.4.4.4 reflect-client
#
ospf 1
area 0.0.0.0
network 3.3.3.0 0.0.0.255
network 23.1.1.0 0.0.0.255
network 34.1.1.0 0.0.0.255
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
AR4
#
sysname AR4
#
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
#
router id 4.4.4.4
#
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 34.1.1.4 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 45.1.1.4 255.255.255.0
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 4.4.4.4 255.255.255.0
#
bgp 200
peer 3.3.3.3 as-number 200
peer 3.3.3.3 connect-interface LoopBack0
peer 45.1.1.5 as-number 300
#
ipv4-family unicast
undo synchronization
aggregate 1.1.0.0 255.255.252.0 as-set detail-suppressed
network 45.1.1.0 255.255.255.0
peer 3.3.3.3 enable
peer 45.1.1.5 enable
#
ospf 1
area 0.0.0.0
network 4.4.4.0 0.0.0.255
network 34.1.1.0 0.0.0.255
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
AR5
#
sysname AR5
#
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
#
router id 5.5.5.5
#
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 45.1.1.5 255.255.255.0
#
interface GigabitEthernet0/0/1
#
interface GigabitEthernet0/0/2
#
interface NULL0
#
interface LoopBack0
ip address 5.5.5.5 255.255.255.0
#
bgp 300
peer 45.1.1.4 as-number 200
#
ipv4-family unicast
undo synchronization
network 5.5.5.0 255.255.255.0
network 45.1.1.0 255.255.255.0
peer 45.1.1.4 enable
#
user-interface con 0
authentication-mode password
user-interface vty 0 4
user-interface vty 16 20
#
wlan ac
#
return
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