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交换机采用策略路由引流给防火墙

2023-12-01提问
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问题描述:

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

粉丝:141人 关注:8人

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

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