问

如何通过PBR策略路由将核心交换机流量引到接入交换机下的终端服务器上

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zhiliao_wOmTEU

zhiliao_wOmTEU 一段

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问题描述：

我在核心上如何将核心全部流量引流至接入交换机下的安全资源池服务器设备上，

最佳答案

zhiliao_sEUyB

zhiliao_sEUyB 九段

粉丝：237人关注：8人

参考案例

1、交换机1将g0/1引用路由策略去往交换机2路由，改至10.2.2.2。

2、交换机2将g0/2引用路由策略从交换机2回去路由，改至10.1.1.2

目前就是，从交换机3去往交换机2流量，在交换机1和防火墙来回发，出现路由环路

交换机1配置

[H3C]display current-configuration

version 7.1.070, Alpha 7170

sysname H3C

irf mac-address persistent timer

irf auto-update enable

undo irf link-delay

irf member 1 priority 1

ip ttl-expires enable

lldp global enable

system-working-mode standard

xbar load-single

password-recovery enable

lpu-type f-series

vlan 1

stp global enable

policy-based-route aaa permit node 1

if-match acl 3000

apply next-hop 10.1.1.2

policy-based-route bbb permit node 1

if-match acl 3001

apply next-hop 10.2.2.2

interface NULL0

interface FortyGigE1/0/53

port link-mode bridge

interface FortyGigE1/0/54

port link-mode bridge

interface GigabitEthernet1/0/1

port link-mode route

combo enable fiber

ip address 1.1.1.1 255.255.255.0

ip policy-based-route bbb

interface GigabitEthernet1/0/2

port link-mode route

combo enable fiber

ip address 2.2.2.1 255.255.255.0

ip policy-based-route aaa

interface GigabitEthernet1/0/3

port link-mode route

combo enable fiber

ip address 10.1.1.1 255.255.255.252

interface GigabitEthernet1/0/4

port link-mode route

combo enable fiber

ip address 10.2.2.1 255.255.255.252

interface GigabitEthernet1/0/5

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/6

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/7

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/8

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/9

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/10

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/11

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/12

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/13

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/14

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/15

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/16

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/17

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/18

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/19

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/20

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/21

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/22

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/23

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/24

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/25

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/26

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/27

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/28

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/29

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/30

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/31

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/32

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/33

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/34

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/35

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/36

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/37

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/38

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/39

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/40

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/41

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/42

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/43

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/44

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/45

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/46

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/47

port link-mode bridge

combo enable fiber

interface GigabitEthernet1/0/48

port link-mode bridge

combo enable fiber

interface M-GigabitEthernet0/0/0

interface Ten-GigabitEthernet1/0/49

port link-mode bridge

combo enable fiber

interface Ten-GigabitEthernet1/0/50

port link-mode bridge

combo enable fiber

interface Ten-GigabitEthernet1/0/51

port link-mode bridge

combo enable fiber

interface Ten-GigabitEthernet1/0/52

port link-mode bridge

combo enable fiber

scheduler logfile size 16

line class aux

user-role network-operator

line class console

user-role network-admin

line class tty

user-role network-operator

line class vty

user-role network-operator

line aux 0

user-role network-operator

line con 0

user-role network-admin

line vty 0 63

user-role network-operator

acl advanced 3000

rule 0 permit ip source 2.2.2.0 0.0.0.255

acl advanced 3001

rule 0 permit ip destination 2.2.2.0 0.0.0.255

radius scheme system

user-name-format without-domain

domain system

domain default enable system

role name level-0

description Predefined level-0 role

role name level-1

description Predefined level-1 role

role name level-2

description Predefined level-2 role

role name level-3

description Predefined level-3 role

role name level-4

description Predefined level-4 role

role name level-5

description Predefined level-5 role

role name level-6

description Predefined level-6 role

role name level-7

description Predefined level-7 role

role name level-8

description Predefined level-8 role

role name level-9

description Predefined level-9 role

role name level-10

description Predefined level-10 role

role name level-11

description Predefined level-11 role

role name level-12

description Predefined level-12 role

role name level-13

description Predefined level-13 role

role name level-14

description Predefined level-14 role

user-group system

防火墙配置

<H3C>display current-configuration

version 7.1.064, Alpha 7164

sysname H3C

context Admin id 1

telnet server enable

irf mac-address persistent timer

irf auto-update enable

undo irf link-delay

irf member 1 priority 1

ip ttl-expires enable

xbar load-single

password-recovery enable

lpu-type f-series

vlan 1

interface NULL0

interface GigabitEthernet1/0/0

port link-mode route

combo enable copper

ip address 11.11.11.1 255.255.255.0

interface GigabitEthernet1/0/1

port link-mode route

combo enable copper

interface GigabitEthernet1/0/2

port link-mode route

combo enable copper

interface GigabitEthernet1/0/3

port link-mode route

combo enable copper

ip address 10.1.1.2 255.255.255.252

interface GigabitEthernet1/0/4

port link-mode route

combo enable copper

ip address 10.2.2.2 255.255.255.252

interface GigabitEthernet1/0/5

port link-mode route

combo enable copper

interface GigabitEthernet1/0/6

port link-mode route

combo enable copper

interface GigabitEthernet1/0/7

port link-mode route

combo enable copper

interface GigabitEthernet1/0/8

port link-mode route

combo enable copper

interface GigabitEthernet1/0/9

port link-mode route

combo enable copper

interface GigabitEthernet1/0/10

port link-mode route

combo enable copper

interface GigabitEthernet1/0/11

port link-mode route

combo enable copper

interface GigabitEthernet1/0/12

port link-mode route

combo enable copper

interface GigabitEthernet1/0/13

port link-mode route

combo enable copper

interface GigabitEthernet1/0/14

port link-mode route

combo enable copper

interface GigabitEthernet1/0/15

port link-mode route

combo enable copper

interface GigabitEthernet1/0/16

port link-mode route

combo enable copper

interface GigabitEthernet1/0/17

port link-mode route

combo enable copper

interface GigabitEthernet1/0/18

port link-mode route

combo enable copper

interface GigabitEthernet1/0/19

port link-mode route

combo enable copper

interface GigabitEthernet1/0/20

port link-mode route

combo enable copper

interface GigabitEthernet1/0/21

port link-mode route

combo enable copper

interface GigabitEthernet1/0/22

port link-mode route

combo enable copper

interface GigabitEthernet1/0/23

port link-mode route

combo enable copper

security-zone name Local

security-zone name Trust

import interface GigabitEthernet1/0/3

security-zone name DMZ

security-zone name Untrust

import interface GigabitEthernet1/0/4

security-zone name Management

import interface GigabitEthernet1/0/0

scheduler logfile size 16

line class aux

user-role network-operator

line class console

user-role network-admin

line class tty

user-role network-operator

line class vty

user-role network-operator

line aux 0

user-role network-admin

line con 0

authentication-mode scheme

user-role network-admin

line vty 0 4

authentication-mode scheme

user-role network-admin

line vty 5 63

user-role network-operator

ip route-static 0.0.0.0 0 10.2.2.1

ip route-static 2.2.2.0 24 10.1.1.1

info-center loghost 127.0.0.1 port 3301 format default

info-center source CFGLOG loghost level informational

acl basic 2000

rule 0 permit source 1.1.1.0 0.0.0.255

domain system

aaa session-limit ftp 16

aaa session-limit telnet 16

aaa session-limit ssh 16

domain default enable system

role name level-0

description Predefined level-0 role

role name level-1

description Predefined level-1 role

role name level-2

description Predefined level-2 role

role name level-3

description Predefined level-3 role

role name level-4

description Predefined level-4 role

role name level-5

description Predefined level-5 role

role name level-6

description Predefined level-6 role

role name level-7

description Predefined level-7 role

role name level-8

description Predefined level-8 role

role name level-9

description Predefined level-9 role

role name level-10

description Predefined level-10 role

role name level-11

description Predefined level-11 role

role name level-12

description Predefined level-12 role

role name level-13

description Predefined level-13 role

role name level-14

description Predefined level-14 role

user-group system

local-user admin class manage

password hash $h$6$MKVVV6yuS8P36pPn$LC0CUf4NLzlDup3kMQXzJ9JHTBcmIq0Ip3c9V2lwfqo5hoOZ/U9cwrgwIqnZgUeLPJayreTttl5CDDTs9nzCmg==

service-type telnet terminal http https

authorization-attribute user-role level-3

authorization-attribute user-role network-admin

authorization-attribute user-role network-operator

ip http enable

ip https enable

security-policy ip

rule 0 name 0

action pass

source-zone Trust

source-zone local

source-zone Untrust

destination-zone local

destination-zone Trust

destination-zone Untrust

return

<H3C>

最佳答案

zhiliao_sEUyB

参考下案例：

如图，交换机的int vlan 10和防火墙的RAGG1.10处于同一网段，交换机的int vlan20、路由器的GE0/0以及防火墙的RAGG1.20处于同一网段。

现在客户需要实现如下需求：防火墙工作正常的时候，终端前往边界路由器的流量需要经过防火墙，但是当防火墙异常的时候，流量直接从交换机转发给防火墙。

在交换机和路由器上通过配置静态路由结合track NQA，使防火墙正常的时候路由指向防火墙，当防火墙出问题后，路由不再指向防火墙，直接在交换机转发。

配置步骤

防火墙配置：

interface Route-Aggregation1.10

ip address 192.168.10.1 255.255.255.0

vlan-type dot1q vid 10

interface Route-Aggregation1.20

ip address 192.168.20.1 255.255.255.0

vlan-type dot1q vid 20

interface GigabitEthernet1/0/0

port link-mode route

port link-aggregation group 1

interface GigabitEthernet1/0/1

port link-mode route

port link-aggregation group 1

security-zone name Trust

import interface Route-Aggregation1.10

security-zone name Untrust

import interface Route-Aggregation1.20

ip route-static 0.0.0.0 0 192.168.20.3

ip route-static 192.168.100.0 24 192.168.10.2

security-policy ip

rule 0 name permit-all

action pass

source-zone untrust

source-zone trust

source-zone local

destination-zone untrust

destination-zone trust

destination-zone local

交换机配置

track 1 nqa entry fw 1 reaction 1 //track nqa状态

nqa entry fw 1 //配置nqa，探测10.1是否可达，频率1秒（100厘秒），探测三次

type icmp-echo

destination ip 192.168.10.1

frequency 100

reaction 1 checked-element probe-fail threshold-type consecutive 3 action-type trigger-only

nqa schedule fw 1 start-time now lifetime forever //开启nqa探测

interface Bridge-Aggregation1

port link-type trunk

port trunk permit vlan 1 10 20

interface Vlan-interface10

ip address 192.168.10.2 255.255.255.0

interface Vlan-interface20

ip address 192.168.20.2 255.255.255.0

interface Vlan-interface100

ip address 192.168.100.1 255.255.255.0

interface GigabitEthernet1/0/1

port link-mode bridge

port link-type trunk

port trunk permit vlan 1 10 20

port link-aggregation group 1

interface GigabitEthernet1/0/2

port link-mode bridge

port link-type trunk

port trunk permit vlan 1 10 20

port link-aggregation group 1

ip route-static 0.0.0.0 0 192.168.10.1 track 1 //配置静态路由指向防火墙并调用track，当nqa探测失败的时候自动失效

ip route-static 0.0.0.0 0 192.168.20.3 preference 70 //配置浮动路由指向路由器，当上面的静态路由失效的时候生效

路由器配置

track 1 nqa entry fw 1 reaction 1 //track nqa状态

nqa entry fw 1 //配置nqa，探测20.1是否可达，频率1秒（100厘秒），探测三次

type icmp-echo

destination ip 192.168.20.1

frequency 100

reaction 1 checked-element probe-fail threshold-type consecutive 3 action-type trigger-only

nqa schedule fw 1 start-time now lifetime forever //开启nqa探测

interface LoopBack0 //模拟的外网地址

ip address 100.100.100.100 255.255.255.255

interface GigabitEthernet0/0

port link-mode route

ip address 192.168.20.3 255.255.255.0

ip route-static 192.168.100.0 24 192.168.20.1 track 1 //配置静态路由指向防火墙并调用track，当nqa探测失败的时候自动失效

ip route-static 192.168.100.0 24 192.168.20.2 preference 70 //配置浮动路由指向交换机，当上面的静态路由失效的时候生效

测试结果

正常情况下的交换机路由表

[SW]dis ip ro

Destinations : 21 Routes : 21

Destination/Mask Proto Pre Cost NextHop Interface

0.0.0.0/0 Static 60 0 192.168.10.1 Vlan10

......

正常情况下的路由器路由表

[RT]dis ip ro

Destinations : 14 Routes : 14

Destination/Mask Proto Pre Cost NextHop Interface

......

192.168.100.0/24 Static 60 0 192.168.20.1 GE0/0

......

PC(192.168.100.2)测试访问100.100.100.100

[PC]ping 100.100.100.100

Ping 100.100.100.100 (100.100.100.100): 56 data bytes, press CTRL_C to break

56 bytes from 100.100.100.100: icmp_seq=0 ttl=253 time=3.000 ms

56 bytes from 100.100.100.100: icmp_seq=1 ttl=253 time=3.000 ms

56 bytes from 100.100.100.100: icmp_seq=2 ttl=253 time=3.000 ms

56 bytes from 100.100.100.100: icmp_seq=3 ttl=253 time=2.000 ms

56 bytes from 100.100.100.100: icmp_seq=4 ttl=253 time=4.000 ms

--- Ping statistics for 100.100.100.100 ---

5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss

round-trip min/avg/max/std-dev = 2.000/3.000/4.000/0.632 ms

此时防火墙能够看到会话，说明流量经过防火墙

[FW]dis session table ipv4 source-ip 192.168.100.2 destination-ip 100.100.100.100 verbose

Slot 1:

Initiator:

Source IP/port: 192.168.100.2/225

Destination IP/port: 100.100.100.100/2048

DS-Lite tunnel peer: -

VPN instance/VLAN ID/Inline ID: -/-/-

Protocol: ICMP(1)

Inbound interface: Route-Aggregation1.10

Source security zone: Trust

Responder:

Source IP/port: 100.100.100.100/225

Destination IP/port: 192.168.100.2/0

DS-Lite tunnel peer: -

VPN instance/VLAN ID/Inline ID: -/-/-

Protocol: ICMP(1)

Inbound interface: Route-Aggregation1.20

Source security zone: Untrust

State: ICMP_REPLY

Application: ICMP

Rule ID: 0

Rule name: permit-all

Start time: 2020-04-30 03:10:17 TTL: 26s

Initiator->Responder: 0 packets 0 bytes

Responder->Initiator: 0 packets 0 bytes

Total sessions found: 1

当防火墙故障的时候，track使静态路由失效

%Apr 30 03:25:36:153 2020 SW NQA/6/NQA_ENTRY_PROBE_RESULT: Reaction entry 1 of NQA entry admin-name fw operation-tag 1: probe-fail.

dis track 1

Track ID: 1

State: Negative

Duration: 0 days 0 hours 0 minutes 15 seconds

Tracked object type: NQA

Notification delay: Positive 0, Negative 0 (in seconds)

Tracked object:

NQA entry: fw 1

Reaction: 1

Remote IP/URL: 192.168.10.1

Local IP: --

Interface: --

%Apr 30 03:25:41:279 2020 RT NQA/6/NQA_ENTRY_PROBE_RESULT: Reaction entry 1 of NQA entry admin-name fw operation-tag 1: probe-fail.

dis track 1

Track ID: 1

State: Negative

Duration: 0 days 0 hours 2 minutes 43 seconds

Tracked object type: NQA

Notification delay: Positive 0, Negative 0 (in seconds)

Tracked object:

NQA entry: fw 1

Reaction: 1

Remote IP/URL: 192.168.20.1

Local IP: --

Interface: --

此时看静态路由，发现SW、RT的路由已切换不走防火墙

dis ip ro

Destinations : 21 Routes : 21

Destination/Mask Proto Pre Cost NextHop Interface

0.0.0.0/0 Static 70 0 192.168.20.3 Vlan20

......

dis ip ro

Destinations : 14 Routes : 14

......

192.168.100.0/24 Static 70 0 192.168.20.2 GE0/0

......

PC仍然能够ping通100.100.100.100

ping 100.100.100.100

Ping 100.100.100.100 (100.100.100.100): 56 data bytes, press CTRL_C to break

56 bytes from 100.100.100.100: icmp_seq=0 ttl=254 time=2.000 ms

56 bytes from 100.100.100.100: icmp_seq=1 ttl=254 time=1.000 ms

56 bytes from 100.100.100.100: icmp_seq=2 ttl=254 time=1.000 ms

56 bytes from 100.100.100.100: icmp_seq=3 ttl=254 time=1.000 ms

56 bytes from 100.100.100.100: icmp_seq=4 ttl=254 time=2.000 ms

--- Ping statistics for 100.100.100.100 ---

5 packet(s) transmitted, 5 packet(s) received, 0.0% packet loss

round-trip min/avg/max/std-dev = 1.000/1.400/2.000/0.490 ms

此时由于流量不经过防火墙，防火墙上没有会话

[FW-Route-Aggregation1.10]dis session table ipv4 source-ip 192.168.100.2 destination-ip 100.100.100.100 verbose

Slot 1:

Total sessions found: 0

1 个回答

按时间按赞数

叫我靓仔

叫我靓仔九段

粉丝：167人关注：1人

你这个场景，直接配置端口镜像就行了

这边需求是需要捕捉流量并且可以进行拦截

zhiliao_wOmTEU 发表时间：3天前 更多>>

这边需求是需要捕捉流量并且可以进行拦截

zhiliao_wOmTEU 发表时间：3天前

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