基于策略的路由为表示和实现转发提供一机制/根据策略的路由数据包定义由网络管理员。基于策略的路由应用到流入数据包并且使用路由映射定义策略。基于在路由映射定义的标准,数据包转发/路由对适当的下一跳。本文为基于策略的路由提供一配置示例通过IPv6。
本文档没有任何特定的要求。
注意:IPv6 PBR的参考的限制关于限制的更多信息。
本文档不限于特定的软件和硬件版本。
本文档中的信息都是基于特定实验室环境中的设备编写的。本文档中使用的所有设备最初均采用原始(默认)配置。如果您使用的是真实网络,请确保您已经了解所有命令的潜在影响。
有关文档规则的详细信息,请参阅 Cisco 技术提示规则。
在此配置情形中,基于策略的路由(PBR)在WAN路由器配置,并且策略路由在fa1/0接口应用。根据从网络的配置流量, 6001:66:66:66::6重定向到中间路由器。这通过基于策略的路由达到。此配置示例设置下一跳到2001:10:10:10::2。如果数据流源是6001:66:66:66::6,则流量重定向到然后到达互联网路由器的中间路由器。
注意:有关本文档所用命令的详细信息,请使用命令查找工具(仅限注册用户)。
本文档使用以下网络设置:
本文档使用以下配置:
WAN路由器配置
WAN_Router#
!
ipv6 unicast-routing
ipv6 cef
!
interface FastEthernet0/0
no ip address
duplex auto
speed 100
ipv6 address 1001:10:10:10::1/64
ipv6 enable
ipv6 eigrp 55
!
interface FastEthernet0/1
no ip address
duplex auto
speed 100
ipv6 address 2001:10:10:10::1/64
ipv6 enable
ipv6 eigrp 55
!
interface FastEthernet1/0
no ip address
speed 100
full-duplex
ipv6 address 3001:10:10:10::1/64
ipv6 enable
ipv6 eigrp 55
ipv6 policy route-map ipv6
!
ipv6 router eigrp 55
router-id 3.3.3.3
no shutdown
!
route-map ipv6 permit 10
match ipv6 address ALLOW_INTERNAL_NETWORK
set ipv6 next-hop 2001:10:10:10::2
!
ipv6 access-list ALLOW_INTERNAL_NETWORK
permit ipv6 6001:66:66:66::/64 any
!--- Creates IPv6 access-list ALLOW_INTERNAL_NETWORK !--- and permits any ipv6 address in the network 6001:66:66:66::/64
!
中间路由器配置
Intermediate_Router#
!
ip cef
!
ipv6 unicast-routing
ipv6 cef
!
interface FastEthernet0/0
no ip address
duplex auto
speed 100
ipv6 address 2001:10:10:10::2/64
ipv6 enable
ipv6 eigrp 55
!
interface FastEthernet0/1
no ip address
duplex auto
speed 100
ipv6 address 4001:10:10:10::2/64
ipv6 enable
ipv6 eigrp 55
!
ipv6 router eigrp 55
router-id 2.2.2.2
no shutdown
!
互联网路由器配置
Internet_Router#
!
ip cef
!
ipv6 unicast-routing
ipv6 cef
!
!
interface Loopback10
no ip address
ipv6 address 5001:55:55:55::5/64
ipv6 enable
!
interface FastEthernet0/0
no ip address
duplex auto
speed 100
ipv6 address 1001:10:10:10::2/64
ipv6 enable
ipv6 eigrp 55
!
interface FastEthernet0/1
no ip address
duplex auto
speed 100
ipv6 address 4001:10:10:10::1/64
ipv6 enable
ipv6 eigrp 55
!
ipv6 route ::/64 Loopback10
ipv6 router eigrp 55
router-id 1.1.1.1
no shutdown
redistribute connected
!
本地路由器配置
Local_Router#
!
ip cef
!
ipv6 unicast-routing
ipv6 cef
!
!
interface Loopback10
no ip address
ipv6 address 6001:66:66:66::6/64
ipv6 enable
!
interface FastEthernet0/0
no ip address
speed 100
full-duplex
ipv6 address 3001:10:10:10::2/64
ipv6 enable
!
!
ipv6 route ::/64 FastEthernet0/0
!--- Static route is configured in the local router.
!
发出ping命令从Local_Router为了检查基于策略的路由:
Local_Router#ping ipv6 5001:55:55:55::5
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 5001:55:55:55::5, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/40/76 ms
启用此debug命令在WAN_Router为了发现基于策略的路由是否作用适当地:
Wan_Router#
当此示例输出显示, IPv4和IPv6 PBR在接口不能共存:
route-map BGP-NLGP-MSP-I2RandE-ALLOW permit 10
description For allowing BGP sessions and setting next hops
match ipv6 address BGP-NLGP-MSP-I2RandE-IPV6-ALLOW
!
route-map BGP-NLGP-MSP-I2RandE-ALLOW permit 20
match ip address BGP-NLGP-MSP-I2RandE-IPV4-ALLOW
!
route-map BGP-NLGP-MSP-I2RandE-ALLOW permit 30
set ip next-hop 192.168.48.41
set ipv6 next-hop 2620:32:0:1000::2
!
为了应用IPv4和IPv6,您在接口必须使用两个不同route-map IPv4和IPv6然后应用他们。此输出示例:提供一示例:
route-map IPv6 permit 10
match ipv6 address BGP-NLGP-MSP-I2RandE-IPV6-ALLOW
set ipv6 next-hop 2620:32:0:1000::2
route-map IPV4 permit 10
match ip address BGP-NLGP-MSP-I2RandE-IPV4-ALLOW
set ip next-hop 192.168.48.41
Router#show run interface e0/0
Building configuration...
Current configuration : 163 bytes
!
interface Ethernet0/0
ip address 10.57.253.109 255.255.255.252
ip policy route-map IPV4
ipv6 address 2001:468:1900:70::1/64
ipv6 policy route-map IPv6
end