多宿主MPLS/VPN中，应用AS-override注意的问题
由 admin 于星期二, 04/01/2008 - 16:25 发表
目的
研究PE与CE间使用BGP时，可能出现的次优路径与其环路
拓扑图在下面当PE与CE之间使用BGP时，在多宿主网络中，使用AS-override 有可能形成次优路径或环路，如上图所示。配置如下
R1
ip vrf vpn-a
rd 1:10
route-target export 1:10研发总监
route-target import 1:10
!
ip cef
!
interface Loopback0
ip address 1.1.1.1 255.255.255.255
!
interface FastEthernet0/0
no ip address
interface FastEthernet0/0.12
encapsulation dot1Q 12
ip address 12.1.1.1 255.255.255.0
tag-switching ip
!
interface FastEthernet0/0.13
encapsulation dot1Q 13
ip address 13.1.1.1 255.255.255.0
tag-switching ip
!
interface FastEthernet0/0.14后退的反义词
encapsulation dot1Q 14
ip vrf forwarding vpn-a
ip address 14.1.1.1 255.255.255.0
router ospf 10log-adjacency-changes
network 0.0.0.0 255.255.255.255 area 0
!
router bgp 1
no synchronization
bgp log-neighbor-changes
neighbor 2.2.2.2 remote-as 1
neighbor 2.2.2.2 update-source Loopback0
neighbor 3.3.3.3 remote-as 1
neighbor 3.3.3.3 update-source Loopback0
no auto-summary
!
address-family vpnv4
neighbor 2.2.2.2 activate
neighbor 2.2.2.2 nd-community extended neighbor 3.3.3.3 activate
neighbor 3.3.3.3 nd-community extended exit-address-family
!
address-family ipv4 vrf vpn-a
neighbor 14.1.1.4 remote-as 2
neighbor 14.1.1.4 activate
neighbor 14.1.1.4 as-override
no auto-summary
no synchronization
exit-address-family
广东高考总分多少R2
ip vrf vpn-a
rd 1:10
route-target export 1:10
route-target import 1:10
!
ip cef
!
interface Loopback0
ip address 2.2.2.2 255.255.255.255
!
interface FastEthernet0/0
no ip address
!
interface FastEthernet0/0.12 encapsulation dot1Q 12
ip address 12.1.1.2 255.255.255.0
tag-switching ip
!
interface FastEthernet0/0.23 encapsulation dot1Q 23
ip address 23.1.1.2 255.255.255.0
tag-switching ip
!
interface FastEthernet0/0.25 encapsulation dot1Q 25
ip vrf forwarding vpn-a
ip address 25.1.1.2 255.255.255.0
router ospf 10
雪里开图片log-adjacency-changes
network 0.0.0.0 255.255.255.255 area 0 !
router bgp 1
no synchronization
bgp log-neighbor-changes
neighbor 1.1.1.1 remote-as 1
neighbor 1.1.1.1 update-source Loopback0 neighbor 3.3.3.3 remote-as 1
neighbor 3.3.3.3 update-source Loopback0 no auto-summary
!
address-family vpnv4
neighbor 1.1.1.1 activate
neighbor 1.1.1.1 nd-community extended neighbor 3.3.3.3 activate
neighbor 3.3.3.3 nd-community extended exit-address-family
!
address-family ipv4 vrf vpn-a
neighbor 25.1.1.5 remote-as 2
各种交通标志neighbor 25.1.1.5 activate
neighbor 25.1.1.5 as-override
no auto-summary
no synchronization
exit-address-family
R3
ip vrf vpn-a
rd 1:10
route-target export 1:10
route-target import 1:10
!
ip cef
interface Loopback0
ip address 3.3.3.3 255.255.255.255
新月集读后感!
interface FastEthernet0/0
no ip address
duplex half
!
interface FastEthernet0/0.13 encapsulation dot1Q 13
ip address 13.1.1.3 255.255.255.0
tag-switching ip
!
interface FastEthernet0/0.23 encapsulation dot1Q 23
ip address 23.1.1.3 255.255.255.0
tag-switching ip
!
interface FastEthernet0/0.36 encapsulation dot1Q 36
ip vrf forwarding vpn-a
ip address 36.1.1.3 255.255.255.0
router ospf 10
log-adjacency-changes
network 0.0.0.0 255.255.255.255 area 0 !
router bgp 1
no synchronization
bgp log-neighbor-changes
neighbor 1.1.1.1 remote-as 1
neighbor 1.1.1.1 update-source Loopback0 neighbor 2.2.2.2 remote-as 1
neighbor 2.2.2.2 update-source Loopback0 no auto-summary
!
address-family vpnv4
neighbor 1.1.1.1 activate
neighbor 1.1.1.1 nd-community extended neighbor 2.2.2.2 activate
neighbor 2.2.2.2 nd-community extended exit-address-family
!
address-family ipv4 vrf vpn-a
neighbor 36.1.1.6 remote-as 2
neighbor 36.1.1.6 activate
微波炉烤蛋neighbor 36.1.1.6 as-override
no auto-summary
no synchronization
exit-address-family
R4
interface Loopback0
ip address 4.4.4.4 255.255.255.255
!
interface FastEthernet0/0
no ip address
interface FastEthernet0/0.14
encapsulation dot1Q 14
ip address 14.1.1.4 255.255.255.0
!router bgp 2
no synchronization
bgp log-neighbor-changes
network 1.1.1.1 mask 255.255.255.255 redistribute connected
neighbor 14.1.1.1 remote-as 1
no auto-summary
R5
interface Loopback0
ip address 5.5.5.5 255.255.255.255
!
interface FastEthernet0/0
no ip address
interface FastEthernet0/0.25 encapsulation dot1Q 25
ip address 25.1.1.5 255.255.255.0
!
interface FastEthernet0/0.56 encapsulation dot1Q 56
ip address 56.1.1.5 255.255.255.0 rial restart-delay 0
!
router ospf 100
router-id 5.5.5.5
log-adjacency-changes
network 0.0.0.0 255.255.255.255 area 0 !
router bgp 2
no synchronization
bgp log-neighbor-changes
network 5.5.5.5 mask 255.255.255.255 redistribute connected
neighbor 25.1.1.2 remote-as 1
no auto-summary
R6
interface Loopback0
ip address 6.6.6.6 255.255.255.255
高血压护理措施!
interface FastEthernet0/0
no ip address
interface FastEthernet0/0.36 encapsulation dot1Q 36
