11-MSR系列路由器GRE over IPsec with OSPF典型配置举例
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MSR系列路由器GRE over IPsec with OSPF典型配置举例
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目 录
本文档介绍GRE over IPsec with OSPF的典型配置举例。
本文档不严格与具体软、硬件版本对应,如果使用过程中与产品实际情况有差异,请参考相关产品手册,或以设备实际情况为准。
本文档中的配置均是在实验室环境下进行的配置和验证,配置前设备的所有参数均采用出厂时的缺省配置。如果您已经对设备进行了配置,为了保证配置效果,请确认现有配置和以下举例中的配置不冲突。
本文档假设您已了解IPsec、GRE和OSPF特性。
如图1所示,Router A和Router B是某公司位于不同地点的两个网络的网关,要求:
· 建立GRE隧道使内网之间可以互通。
· 在GRE隧道上运行OSPF,传递内网路由。
· 建立IPsec隧道,对OSPF的路由信息进行加密,使它安全的穿越外部网络,而不会泄漏内部网络的路由。
图1 GRE over IPsec with OSPF配置组网图
· 将GRE隧道与OSPF结合使用,可以通过GRE来传递OSPF路由,从而使企业私网之间可以互通。
· 将IPsec与GRE结合使用,可以对通过GRE隧道的路由即企业私网间的通信进行保护。
· 将ACL中源、目的IP地址与建立GRE隧道的源、目的IP地址配置相同,可以对整个GRE隧道进行保护。
本举例是在Release 2207版本上进行配置和验证的。
不能将建立GRE隧道连接的接口加入到OSPF,否则连接会失效。
# 配置接口Ethernet0/1的IP地址。
<RouterA> system-view
[RouterA] interface ethernet 0/1
[RouterA-Ethernet0/1] ip address 30.1.1.1 255.0.0.0
[RouterA-Ethernet0/1] quit
# 配置接口serial 1/0的IP地址。
[RouterA] interface serial 1/0
[RouterA-Serial1/0] link-protocol ppp
[RouterA-Serial1/0 ]ip address 202.115.22.48 255.255.255.0
[RouterA-Serial1/0] quit
# 创建ACL3000,定义需要IPsec保护的数据流。
[RouterA] acl number 3000
[RouterA-acl-adv-3000] rule 0 permit ip source 202.115.22.48 0 destination 202.115.22.49 0
[RouterA-acl-adv-3000] quit
# 配置IKE对等体。
[RouterA] ike peer test
[RouterA-ike-peer-test] pre-shared-key 123
[RouterA-ike-peer-test] remote-address 202.115.22.49
[RouterA-ike-peer-test] quit
# 配置IPsec安全提议。
[RouterA] ipsec proposal test
[RouterA-ipsec-proposal-test] esp authentication-algorithm sha1
[RouterA-ipsec-proposal-test] esp encryption-algorithm 3des
[RouterA-ipsec-proposal-test] quit
# 配置IPsec策略
[RouterA] ipsec policy test 1 isakmp
[RouterA-ipsec-policy-isakmp-test-1] security acl 3000
[RouterA-ipsec-policy-isakmp-test-1] ike-peer test
[RouterA-ipsec-policy-isakmp-test-1] proposal test
[RouterA-ipsec-policy-isakmp-test-1] quit
# 在接口serial 1/0上应用IPsec策略。
[RouterA] interface serial 1/0
[RouterA-Serial1/0] ipsec policy test
[RouterA-Serial1/0] quit
# 配置GRE隧道。
[RouterA] interface tunnel 0
[RouterA-Tunnel0] ip address 11.1.1.1 255.0.0.0
[RouterA-Tunnel0] source 202.115.22.48
[RouterA-Tunnel0] destination 202.115.22.49
[RouterA-Tunnel0] gre key 4533
[RouterA-Tunnel0] gre checksum
[RouterA-Tunnel0] quit
# 配置OSPF路由协议。
[RouterA] ospf 1
[RouterA-ospf-1] area 0.0.0.0
[RouterA-ospf-1-area-0.0.0.0] network 11.0.0.0 0.255.255.255
[RouterA-ospf-1-area-0.0.0.0] area 0.0.0.1
[RouterA-ospf-1-area-0.0.0.1] network 30.0.0.0 0.255.255.255
[RouterA-ospf-1-area-0.0.0.1] quit
# 配置接口Ethernet0/1的IP地址。
<RouterB> system-view
[RouterB] interface ethernet 0/1
[RouterB-Ethernet0/1] ip address 40.1.1.1 255.0.0.0
[RouterB-Ethernet0/1] quit
# 配置接口serial 1/0的IP地址。
[RouterB] interface serial 1/0
[RouterB-Serial1/0] link-protocol ppp
[RouterB-Serial1/0] ip address 202.115.22.49 255.255.255.0
[RouterB-Serial1/0] quit
# 创建ACL3000,定义需要IPsec保护的数据流。
[RouterB] acl number 3000
[RouterB-acl-adv-3000] rule 0 permit ip source 202.115.22.49 0 destination 202.115.22.48 0
[RouterB-acl-adv-3000] quit
# 配置IKE对等体。
[RouterB]ike peer test
[RouterB-ike-peer-test] pre-shared-key 123
[RouterB-ike-peer-test] remote-address 202.115.22.48
[RouterB-ike-peer-test] quit
# 配置IPsec安全提议。
[RouterB] ipsec proposal test
[RouterB-ipsec-proposal-test] esp authentication-algorithm sha1
[RouterB-ipsec-proposal-test] esp encryption-algorithm 3des
[RouterB-ipsec-proposal-test] quit
# 配置IPsec策略。
[RouterB] ipsec policy test 1 isakmp
[RouterB-ipsec-policy-isakmp-test-1] security acl 3000
[RouterB-ipsec-policy-isakmp-test-1] ike-peer test
[RouterB-ipsec-policy-isakmp-test-1] proposal test
[RouterB-ipsec-policy-isakmp-test-1] quit
# 在接口serial 1/0上应用IPsec策略。
[RouterB] interface serial 1/0
[RouterB-Serial1/0] ipsec policy test
[RouterB-Serial1/0] quit
# 配置GRE隧道。
[RouterB] interface tunnel 0
[RouterB-Tunnel0] ip address 11.1.1.2 255.0.0.0
[RouterB-Tunnel0] source 202.115.22.49
[RouterB-Tunnel0] destination 202.115.22.48
[RouterB-Tunnel0] gre key 4533
[RouterB-Tunnel0] gre checksum
[RouterB-Tunnel0] quit
# 配置OSPF路由协议。
[RouterB] ospf 1
[RouterB-ospf-1] area 0.0.0.0
[RouterB-ospf-1-area-0.0.0.0] network 11.0.0.0 0.255.255.255
[RouterB-ospf-1-area-0.0.0.0] area 0.0.0.2
[RouterB-ospf-1-area-0.0.0.2] network 40.0.0.0 0.255.255.255
[RouterB-ospf-1-area-0.0.0.2] quit
# 配置完成后OSPF通过GRE的tunnel接口向外发送hello报文,由于hello报文经过GRE封装,匹配了acl规则,因此触发了ike协商。在OSPF建立邻居关系的同时,IPsec经过协商后也会建立起IPsec隧道。以Router A为例,使用display ike sa命令可以查看sa建立情况。
<RouterA> display ike sa
total phase-1 SAs: 1
connection-id peer flag phase doi
----------------------------------------------------------------
8 202.115.22.49 RD|ST 1 IPSEC
9 202.115.22.49 RD|ST 2 IPSEC
flag meaning
RD--READY ST--STAYALIVE RL--REPLACED FD--FADING TO--TIMEOUT
# 在系统视图下使用display ipsec sa命令可以看到ipsec sa的建立情况。
<RouterA> display ipsec sa
===============================
Interface: Serial1/0
path MTU: 1500
===============================
-----------------------------
IPsec policy name: "test"
sequence number: 1
mode: isakmp
-----------------------------
connection id: 1
encapsulation mode: tunnel
perfect forward secrecy:
tunnel:
local address: 202.115.22.48
remote address: 202.115.22.49
flow:
sour addr: 202.115.22.48/255.255.255.255 port: 0 protocol: IP
dest addr: 202.115.22.49/255.255.255.255 port: 0 protocol: IP
[inbound ESP SAs]
spi: 54798862 (0x3442a0e)
proposal: ESP-ENCRYPT-3DES ESP-AUTH-SHA1
sa duration (kilobytes/sec): 1843200/3600
sa remaining duration (kilobytes/sec): 1843197/3390
max received sequence-number: 25
anti-replay check enable: Y
anti-replay window size: 32
udp encapsulation used for nat traversal: N
[outbound ESP SAs]
spi: 2040435079 (0x799e9187)
proposal: ESP-ENCRYPT-3DES ESP-AUTH-SHA1
sa duration (kilobytes/sec): 1843200/3600
sa remaining duration (kilobytes/sec): 1843196/3390
max received sequence-number: 31
udp encapsulation used for nat traversal: N
# 在系统视图下使用display ipsec tunnel命令可以看到隧道的统计信息。
<RouterA> display ipsec tunnel
total tunnel : 1
------------------------------------------------
connection id: 1
perfect forward secrecy:
SA's SPI:
inbound: 54798862 (0x3442a0e) [ESP]
outbound: 2040435079 (0x799e9187) [ESP]
tunnel:
local address: 202.115.22.48
remote address: 202.115.22.49
flow:
sour addr: 202.115.22.48/255.255.255.255 port: 0 protocol: IP
dest addr: 202.115.22.49/255.255.255.255 port: 0 protocol: IP
current Encrypt-card:
· Router A:
#
acl number 3000
rule 0 permit ip source 202.115.22.48 0 destination 202.115.22.49 0
#
ike peer test
pre-shared-key cipher pTHDptKNjg0=
remote-address 202.115.22.49
#
ipsec proposal test
esp authentication-algorithm sha1
esp encryption-algorithm 3des
#
ipsec policy test 1 isakmp
security acl 3000
ike-peer test
proposal test
#
interface Ethernet0/1
port link-mode route
ip address 30.1.1.1 255.0.0.0
#
interface Serial1/0
link-protocol ppp
ip address 202.115.22.48 255.255.255.0
ipsec policy test
#
interface Tunnel0
ip address 11.1.1.1 255.0.0.0
source 202.115.22.48
destination 202.115.22.49
gre key 4533
gre checksum
#
ospf 1
area 0.0.0.0
network 11.0.0.0 0.255.255.255
area 0.0.0.1
network 30.0.0.0 0.255.255.255
#
· Router B:
#
acl number 3000
rule 0 permit ip source 202.115.22.49 0 destination 202.115.22.48 0
#
ike peer test
pre-shared-key cipher pTHDptKNjg0=
remote-address 202.115.22.48
#
ipsec proposal test
esp authentication-algorithm sha1
esp encryption-algorithm 3des
#
ipsec policy test 1 isakmp
security acl 3000
ike-peer test
proposal test
#
interface Ethernet0/1
port link-mode route
ip address 40.1.1.1 255.0.0.0
#
interface Serial1/0
port link-protocol ppp
ip address 202.115.22.49 255.255.255.0
ipsec policy test
#
interface Tunnel0
ip address 11.1.1.2 255.0.0.0
source 202.115.22.49
destination 202.115.22.48
gre key 4533
gre checksum
#
ospf 1
area 0.0.0.0
network 11.0.0.0 0.255.255.255
area 0.0.0.2
network 40.0.0.0 0.255.255.255
#
· H3C MSR 系列路由器 命令参考(V5)-R2311
· H3C MSR 系列路由器 配置指导(V5)-R2311
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