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在Cisco路由器上配置ISISv6路由协议

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满天星 发表于 2010-8-20 20:50:57 | 显示全部楼层 |阅读模式
在Cisco路由器上配置ISISv6路由协议
     下面我们将以Cisco路由器为例来演示如何配置IPv6下的ISIS路由协议,本次实验采用三台Router,router1.ipv6bbs.cn与router2.ipv6bbs.cn运行于Level 2,router2.ipv6bbs.cn与router3.ipv6bbs.cn运行于Level 1,每台Router上均起一个Loopback1接口,发布至ISISv6路由协议中。具体的组网图如下所示:
   
实验组网图与IPv6地址分配

    各设备的接口IPv6地址地址与接口编号请对照下图查看:
     

我们最终需要三台路由器上面所有loopback接口IPv6地址均能互通

配置思路与流程说明:

  • 在每台设备上开启IPV6功能:ipv6 unicast-routing
  • 在每台设备上创建ISIS进程号100:router  isis   100
  • 为每台设备的ISIS进程配置唯一的net:net 10.0000.0000.0000.0001.00
  • 为每台设备的ISIS进程配置所属的Level is-type  level-2
  • 在相应接口下开启IPv6:ipv6 enable,并配置IPv6地址:ipv6 address  1::1/128
  • 在相应的接口下使能ISISv6路由协议:ipv6 router isis 100


设备互通存在的问题:
通过上面的组网图我们可以发现:router1.ipv6bbs.cn中的loopback接口位于Level 2中,而router3.ipv6bbs.cn位于Level 1中,由此导致router3.ipv6bbs.cn将无法学到router1.ipv6bbs.cn中loopback的路由,我们从router3.ipv6bbs.cn上将无法ping通router1.ipv6bbs.cn上的loopback接口IPv6地址。

解决方案一:路由重分发
我们可以配置ISIS路由进程中将Level 2上的路由重分发至Level 1中,通过Prefix-list来定义loopback接口IPv6地址。
这样router3.ipv6bbs.cn就能学到router1.ipv6bbs.cn上的loopback接口IPv6地址,各设备之间loopback接口均能互通了。
除重分发外有很多解决方案能实现,我们就不一一列举了

router1.ipv6bbs.cn的配置步骤:

router1.ipv6bbs.cn con0 is now available

Press RETURN to get started.

router1.ipv6bbs.cn>
router1.ipv6bbs.cn>enable
router1.ipv6bbs.cn#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
router1.ipv6bbs.cn(config)#ipv6 unicast-routing
router1.ipv6bbs.cn(config)#router isis 100
router1.ipv6bbs.cn(config-router)#net 10.0000.0000.0000.0001.00
router1.ipv6bbs.cn(config-router)#is-type  level-2
router1.ipv6bbs.cn(config-router)#exit
router1.ipv6bbs.cn(config)#interface loopback1
router1.ipv6bbs.cn(config-if)#
*Aug 18 21:39:56.047: %LINK-3-UPDOWN: Interface Loopback1, changed state to up
*Aug 18 21:39:57.047: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up
router1.ipv6bbs.cn(config-if)#ipv6 enable
router1.ipv6bbs.cn(config-if)#ipv6 address  1::1/128
router1.ipv6bbs.cn(config-if)#ipv6 router isis 100
router1.ipv6bbs.cn(config-if)#exit
router1.ipv6bbs.cn(config)#interface gigabitEthernet 0/0
router1.ipv6bbs.cn(config-if)#ipv6 enable
router1.ipv6bbs.cn(config-if)#ipv6 address 1002::1/64
router1.ipv6bbs.cn(config-if)#ipv6 router isis 100
router1.ipv6bbs.cn(config-if)#no shutdown
router1.ipv6bbs.cn(config-if)#
*Aug 18 21:41:12.455: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to up
*Aug 18 21:41:13.455: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up
router1.ipv6bbs.cn(config-if)#



router2.ipv6bbs.cn的配置步骤:

router2.ipv6bbs.cn con0 is now available

Press RETURN to get started.

router2.ipv6bbs.cn>
router2.ipv6bbs.cn>enable
router2.ipv6bbs.cn#config t
Enter configuration commands, one per line.  End with CNTL/Z.
router2.ipv6bbs.cn(config)#ipv6 unicast-routing
router2.ipv6bbs.cn(config)#router isis 100
router2.ipv6bbs.cn(config-router)#net 10.0000.0000.0000.0002.00
router2.ipv6bbs.cn(config-router)#exit
router2.ipv6bbs.cn(config)#interface loopback1
router2.ipv6bbs.cn(config-if)#
*Aug 18 21:42:29.287: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up
router2.ipv6bbs.cn(config-if)#ipv6 enable
router2.ipv6bbs.cn(config-if)#ipv6 address 2::2/128
router2.ipv6bbs.cn(config-if)#ipv6 router isis 100
router2.ipv6bbs.cn(config-if)#exit
router2.ipv6bbs.cn(config)#interface gigabitEthernet  0/0
router2.ipv6bbs.cn(config-if)#ipv6 enable
router2.ipv6bbs.cn(config-if)#ipv6 address 1002::2/64
router2.ipv6bbs.cn(config-if)#ipv6 router isis 100
router2.ipv6bbs.cn(config-if)#no shutdown
router2.ipv6bbs.cn(config-if)#
*Aug 18 21:44:07.651: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to up
*Aug 18 21:44:08.651: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up
router2.ipv6bbs.cn(config-if)#
*Aug 18 21:44:10.399: %OSPFv3-5-ADJCHG: Process 100, Nbr 1.1.1.1 on GigabitEthernet0/0 from LOADING to FULL, Loading Done
router2.ipv6bbs.cn(config-if)#exit
router2.ipv6bbs.cn(config)#interface gigabitEthernet  1/0
router2.ipv6bbs.cn(config-if)#ipv6 enable
router2.ipv6bbs.cn(config-if)#ipv6  address 2003::1/64
router2.ipv6bbs.cn(config-if)#ipv6 router isis 100
router2.ipv6bbs.cn(config-if)#no shutdown
router2.ipv6bbs.cn(config-if)#
*Aug 18 21:44:58.571: %LINK-3-UPDOWN: Interface GigabitEthernet1/0, changed state to up
*Aug 18 21:44:59.571: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0, changed state to up
router2.ipv6bbs.cn(config-if)#exit
router2.ipv6bbs.cn(config)#



router3.ipv6bbs.cn的配置步骤:

router3.ipv6bbs.cn con0 is now available

Press RETURN to get started.

router3.ipv6bbs.cn>
router3.ipv6bbs.cn>en
router3.ipv6bbs.cn#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
router3.ipv6bbs.cn(config)#ipv6 unicast-routing
router3.ipv6bbs.cn(config)#router isis 100
router3.ipv6bbs.cn(config-router)#net 10.0000.0000.0000.0001.00
router3.ipv6bbs.cn(config-router)#is-type  level-1
router3.ipv6bbs.cn(config-router)#exit
router3.ipv6bbs.cn(config)#interface loopback1
router3.ipv6bbs.cn(config-if)#
*Aug 18 21:46:54.855: %LINK-3-UPDOWN: Interface Loopback1, changed state to up
*Aug 18 21:46:55.855: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up
router3.ipv6bbs.cn(config-if)#ipv6 enable
router3.ipv6bbs.cn(config-if)#ipv6 address 3::3/128
router3.ipv6bbs.cn(config-if)#ipv6 router isis 100
router3.ipv6bbs.cn(config-if)#exit
router3.ipv6bbs.cn(config)#interface gigabitEthernet  0/0
router3.ipv6bbs.cn(config-if)#ipv6 enable
router3.ipv6bbs.cn(config-if)#ipv6 address 2003::2/64
router3.ipv6bbs.cn(config-if)#ipv6 router isis 100
router3.ipv6bbs.cn(config-if)#no shutdown
router3.ipv6bbs.cn(config-if)#
router3.ipv6bbs.cn(config-if)#
*Aug 18 21:48:03.763: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to up
*Aug 18 21:48:04.763: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up
*Aug 18 21:48:06.731: %OSPFv3-5-ADJCHG: Process 100, Nbr 2.2.2.2 on GigabitEthernet0/0 from LOADING to FULL, Loading Done
router3.ipv6bbs.cn(config-if)#^Z
router3.ipv6bbs.cn#


查看各设备IPv6路由表与ISIS邻居状态

所有设备之间的ISISv6路由协议已按照组网图配置完毕,我们可以在router1.ipv6bbs.cn上查看ISISv6邻居,ISISv6路由RIB表
并查看IPv6路由表,均能学到router2.ipv6bbs.cn与router3.ipv6bbs.cn上面的loopback接口。

router1.ipv6bbs.cn#show isis neighbors

System Id      Type Interface   IP Address      State Holdtime Circuit Id
router2.ipv6bbsL2   Gi0/0                       UP    7        router2.ipv6bb.02
router1.ipv6bbs.cn#show isis ipv6 rib
IS-IS IPv6 process 100, local RIB
* 2::2/128
    via FE80::C801:8FF:FE94:8/GigabitEthernet0/0, type L2  metric 20 LSP [6/9]
* 3::3/128
    via FE80::C801:8FF:FE94:8/GigabitEthernet0/0, type L2  metric 30 LSP [6/9]
  1002::/64
    via FE80::C801:8FF:FE94:8/GigabitEthernet0/0, type L2  metric 20 LSP [6/9]
* 2003::/64
    via FE80::C801:8FF:FE94:8/GigabitEthernet0/0, type L2  metric 20 LSP [6/9]
router1.ipv6bbs.cn#show ipv6 route
IPv6 Routing Table - default - 7 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
       B - BGP, M - MIPv6, R - RIP, I1 - ISIS L1
       I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary, D - EIGRP
       EX - EIGRP external, ND - Neighbor Discovery
       O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
LC  1::1/128 [0/0]
     via Loopback1, receive
I2  2::2/128 [115/20]
     via FE80::C801:8FF:FE94:8, GigabitEthernet0/0
I2  3::3/128 [115/30]
     via FE80::C801:8FF:FE94:8, GigabitEthernet0/0
C   1002::/64 [0/0]
     via GigabitEthernet0/0, directly connected
L   1002::1/128 [0/0]
     via GigabitEthernet0/0, receive
I2  2003::/64 [115/20]
     via FE80::C801:8FF:FE94:8, GigabitEthernet0/0
L   FF00::/8 [0/0]
     via Null0, receive
router1.ipv6bbs.cn#


查看router2上面的ISISv6邻居与IPv6路由表,也均能学到router1.ipv6bbs.cn与router3.ipv6bbs.cn上面的loopback接口。:

router2.ipv6bbs.cn#show isis neighbors

System Id      Type Interface   IP Address      State Holdtime Circuit Id
router1.ipv6bbsL2   Gi0/0                       UP    24       router2.ipv6bb.02
router3.ipv6bbsL1   Gi1/0                       UP    9        router3.ipv6bb.02
router2.ipv6bbs.cn#show isis ipv6 rib
IS-IS IPv6 process 100, local RIB
* 1::1/128
    via FE80::C800:8FF:FE94:8/GigabitEthernet0/0, type L2  metric 20 LSP [6/8]
* 3::3/128
    via FE80::C802:8FF:FEE4:8/GigabitEthernet1/0, type L1  metric 20 LSP [9/3]
  1002::/64
    via FE80::C800:8FF:FE94:8/GigabitEthernet0/0, type L2  metric 20 LSP [6/8]
  2003::/64
    via FE80::C802:8FF:FEE4:8/GigabitEthernet1/0, type L1  metric 20 LSP [9/3]
router2.ipv6bbs.cn#show ipv6 route
IPv6 Routing Table - default - 8 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
       B - BGP, M - MIPv6, R - RIP, I1 - ISIS L1
       I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary, D - EIGRP
       EX - EIGRP external, ND - Neighbor Discovery
       O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
I2  1::1/128 [115/20]
     via FE80::C800:8FF:FE94:8, GigabitEthernet0/0
LC  2::2/128 [0/0]
     via Loopback1, receive
I1  3::3/128 [115/20]
     via FE80::C802:8FF:FEE4:8, GigabitEthernet1/0
C   1002::/64 [0/0]
     via GigabitEthernet0/0, directly connected
L   1002::2/128 [0/0]
     via GigabitEthernet0/0, receive
C   2003::/64 [0/0]
     via GigabitEthernet1/0, directly connected
L   2003::1/128 [0/0]
     via GigabitEthernet1/0, receive
L   FF00::/8 [0/0]
     via Null0, receive
router2.ipv6bbs.cn#



router3无法学到router1上的loopback路

查看router3.ipv6bbs.cn上面的ISISv6邻居状态与IPv6路由表,发现只能学到router2.ipv6bbs.cn上面的loopback接口IPv6地址,而router1.ipv6bbs.cn上的loopback接口IPv6地址1::1/128无法学到。因为Level 2中的路由不会发布至Level 1中。我们下一步将配置重分发,将router1.ipv6bbs.cn上的loopback接口IPv6地址1::1/128发布至router3.ipv6bbs.cn的IPv6路由表中,实现所有router之间的loopback接口互通。

router3.ipv6bbs.cn#show isis  neighbors

System Id      Type Interface   IP Address      State Holdtime Circuit Id
router2.ipv6bbsL1   Gi0/0                       UP    29       router3.ipv6bb.02
router3.ipv6bbs.cn#show isis ipv6 rib
IS-IS IPv6 process 100, local RIB
* 2::2/128
    via FE80::C801:8FF:FE94:1C/GigabitEthernet0/0, type L1  metric 20 LSP [6/4]
* 1002::/64
    via FE80::C801:8FF:FE94:1C/GigabitEthernet0/0, type L1  metric 20 LSP [6/4]
  2003::/64
    via FE80::C801:8FF:FE94:1C/GigabitEthernet0/0, type L1  metric 20 LSP [6/4]
router3.ipv6bbs.cn#show ipv6 route
IPv6 Routing Table - default - 6 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
       B - BGP, M - MIPv6, R - RIP, I1 - ISIS L1
       I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary, D - EIGRP
       EX - EIGRP external, ND - Neighbor Discovery
       O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
I1  2::2/128 [115/20]
     via FE80::C801:8FF:FE94:1C, GigabitEthernet0/0
LC  3::3/128 [0/0]
     via Loopback1, receive
I1  1002::/64 [115/20]
     via FE80::C801:8FF:FE94:1C, GigabitEthernet0/0
C   2003::/64 [0/0]
     via GigabitEthernet0/0, directly connected
L   2003::2/128 [0/0]
     via GigabitEthernet0/0, receive
L   FF00::/8 [0/0]
     via Null0, receive
router3.ipv6bbs.cn#


配置ISIS路由重分发
  • 配置流程:
  • 配置prefix-list
  • 进入ipv6 address-family
  • 配置ISISv6重分发level 2至Level 1中


router2.ipv6bbs.cn#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
router2.ipv6bbs.cn(config)#ipv6 prefix-list  ipv6bbs permit 1::1/128
router2.ipv6bbs.cn(config)#router isis 100
router2.ipv6bbs.cn(config-router)#address-family ipv6 unicast
router2.ipv6bbs.cn(config-router-af)#redistribute  isis  level-2 into   level-1 distribute-list ipv6bbs
router2.ipv6bbs.cn(config-router-af)#exit
router2.ipv6bbs.cn(config-router)#^Z
router2.ipv6bbs.cn#


配置完毕以后,我们再次查看router3.ipv6bbs.cn上的ISISv6路由RIB表与IPv6路由表,发现已经学到了router1.ipv6bbs.cn上的loopback接口IPv6地址,并能ping通该loopback接口:

router3.ipv6bbs.cn#show isis ipv6 rib
IS-IS IPv6 process 100, local RIB
* 1::1/128
    via FE80::C801:8FF:FE94:1C/GigabitEthernet0/0, type IA  metric 30 LSP [6/5]
* 2::2/128
    via FE80::C801:8FF:FE94:1C/GigabitEthernet0/0, type L1  metric 20 LSP [6/5]
* 1002::/64
    via FE80::C801:8FF:FE94:1C/GigabitEthernet0/0, type L1  metric 20 LSP [6/5]
  2003::/64
    via FE80::C801:8FF:FE94:1C/GigabitEthernet0/0, type L1  metric 20 LSP [6/5]
router3.ipv6bbs.cn#show ipv6 route
IPv6 Routing Table - default - 7 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
       B - BGP, M - MIPv6, R - RIP, I1 - ISIS L1
       I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary, D - EIGRP
       EX - EIGRP external, ND - Neighbor Discovery
       O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
IA  1::1/128 [115/30]
     via FE80::C801:8FF:FE94:1C, GigabitEthernet0/0
I1  2::2/128 [115/20]
     via FE80::C801:8FF:FE94:1C, GigabitEthernet0/0
LC  3::3/128 [0/0]
     via Loopback1, receive
I1  1002::/64 [115/20]
     via FE80::C801:8FF:FE94:1C, GigabitEthernet0/0
C   2003::/64 [0/0]
     via GigabitEthernet0/0, directly connected
L   2003::2/128 [0/0]
     via GigabitEthernet0/0, receive
L   FF00::/8 [0/0]
     via Null0, receive
router3.ipv6bbs.cn#ping ipv6 1::1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1::1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 412/1465/1868 ms
router3.ipv6bbs.cn#

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