使用OSPFv3配置示例

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已更新: 2023 年 3 月 9 日
文档 ID:112100

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    简介

    本文档介绍如何在接口上为IPv6启用开放最短路径优先(OSPF)版本3。 

    先决条件

    要求

    在接口上启用OSPF for IPv6之前，您必须：

    • 完成 OSPF 网络策略和 IPv6 网络计划。例如，您必须确定是否需要多个区域。

    • 启用 IPv6 单播路由。

    • 在接口上启用 IPv6。

    • 在 OSPF 上为 IPv6 配置 IP 安全 (IPSec) 安全套接应用程序编程接口 (API)，以启用验证和加密。

    使用的组件

    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。如果您的网络处于活动状态，请确保您了解所有命令的潜在影响。

    规则

    有关文档规则的详细信息，请参阅 Cisco 技术提示规则。

    背景信息

    开放最短路径优先 (OSPF) 是一种 IP 路由协议。它是一种链路状态协议，与距离矢量协议相对。链路状态协议根据连接源计算机和目标计算机的链路状态做出路由决策。链路状态是接口及其与相邻网络设备的关系的描述。接口信息包括接口的 IPv6 前缀、网络掩码、连接网络类型、该网络所连接的路由器等。此信息在多种类型的链路状态通告 (LSA) 中传播。 RFC 2740 中描述的 OSPF 版本 3 支持 IPv6。

    配置

    本部分提供有关如何配置本文档所述功能的信息。

    注意：使用命令查找工具/a>查找有关本文档中使用的命令的详细信息。 

    注意：只有思科注册用户才能访问思科内部工具和信息。

    网络图

    本文档使用以下网络设置：

    Network Diagram网络图

    配置

    图中所示的是路由器的 OSPFv3 配置：

    末节路由器 
    ipv6 unicast-routing
ipv6 cef
!
interface GigabitEthernet0/0
 no ip address
 ipv6 address FD01:ABAB::/64 eui-64
     ipv6 enable
 ipv6 ospf 1 area 2
     ipv6 ospf network point-to-point
!
ipv6 router ospf 1
 router-id 10.3.3.3
 area 2 stub
!
    ABR1 路由器 
    ipv6 unicast-routing
ipv6 cef
!
interface GigabitEthernet1
 no ip address
 speed auto
 ipv6 address FD03::1/124
 ipv6 enable
 ipv6 ospf 1 area 0
!
interface GigabitEthernet2
 no ip address
 ipv6 address FD02:ABAB::/64 eui-64
 ipv6 enable
 ipv6 ospf 1 area 2
     ipv6 ospf network point-to-point
!
ipv6 router ospf 1
 router-id 10.1.1.1
 area 2 stub no-summary
!
    ASBR 路由器 
    ipv6 unicast-routing
ipv6 cef
!
interface GigabitEthernet1
 no ip address
 ipv6 address FD03::2/124
 ipv6 enable
 ipv6 ospf 1 area 0
!
interface GigabitEthernet2
 no ip address
 ipv6 address FD03::1:1/124
 ipv6 enable
 ipv6 rip EXT enable
!
ipv6 router ospf 1
 router-id 10.2.2.2
 default-metric 25
 redistribute rip EXT metric-type 1 include-connected
!
ipv6 router rip EXT
 redistribute ospf 1 match internal external 1 external 2 include-connected
!
    外部路由器 
    ipv6 unicast-routing
    ipv6 cef
!
interface Loopback0
 no ip address
 ipv6 address FD04:ABAB::/64 eui-64
 ipv6 enable
 ipv6 rip EXT enable
!
interface GigabitEthernet0/0
 no ip address
 ipv6 address FD03::1:2/124
 ipv6 enable
 ipv6 rip EXT enable
!
ipv6 router rip EXT

    验证

    使用本部分可确认配置能否正常运行。

    Output Interpreter工具支持某些show命令。使用 OIT 可查看对 show 命令输出的分析。

    show ipv6 ospf database 命令显示路由器的链路状态数据库 (LSDB)。

    注意：只有注册的思科用户才能访问内部思科工具和信息。

    Stub_Router#show ipv6 ospf database 

            OSPFv3 Router with ID (10.3.3.3) (Process ID 1)

                Router Link States (Area 2)

ADV Router       Age         Seq#        Fragment ID  Link count  Bits
 10.1.1.1        5           0x8000000F  0            1           B
 10.3.3.3        38          0x8000000E  0            1           None

                Inter Area Prefix Link States (Area 2)

ADV Router       Age         Seq#        Prefix
 10.1.1.1        5           0x80000002  ::/0

                Link (Type-8) Link States (Area 2)

ADV Router       Age         Seq#        Link ID    Interface
 10.1.1.1        5           0x8000000A  8          Gi0/0
 10.3.3.3        292         0x80000005  2          Gi0/0

                Intra Area Prefix Link States (Area 2)

ADV Router       Age         Seq#        Link ID    Ref-lstype  Ref-LSID
 10.1.1.1        5           0x8000000B  0          0x2001      0
 10.3.3.3        548         0x80000002  0          0x2001      0

    show ipv6 ospf database router命令显示路由器发出和接收的Router LSA。路由器 LSA 不传输地址或前缀信息。

    Stub_Router#show ipv6 ospf database router

            OSPFv3 Router with ID (10.3.3.3) (Process ID 1)

                Router Link States (Area 2)

  Routing Bit Set on this LSA
  LS age: 141
  Options: (V6-Bit, R-Bit, DC-Bit)
  LS Type: Router Links
  Link State ID: 0
  Advertising Router: 10.1.1.1
  LS Seq Number: 8000000F
  Checksum: 0x9C2C
  Length: 40
  Area Border Router
  Number of Links: 1

    Link connected to: another Router (point-to-point)
      Link Metric: 1
      Local Interface ID: 8
      Neighbor Interface ID: 2
      Neighbor Router ID: 10.3.3.3

          
  LS age: 174
  Options: (V6-Bit, R-Bit, DC-Bit)
  LS Type: Router Links
  Link State ID: 0
  Advertising Router: 10.3.3.3
  LS Seq Number: 8000000E
  Checksum: 0xBBF
  Length: 40
  Number of Links: 1

    Link connected to: another Router (point-to-point)
      Link Metric: 1
      Local Interface ID: 2
      Neighbor Interface ID: 8
      Neighbor Router ID: 10.1.1.1

    LSA 传输的 Options 字段包含以下位：

    • V6位 — 指示路由器/链路是否必须用于路由计算。

    • R 位 - 这是“路由器位”。它指示发送方是否为活动路由器。

    • DC位 — 指示请求电路的路由器处理。

    show ipv6 ospf database link self-originate命令显示链路LSA承载特定于链路的地址。

    Stub_Router#show ipv6 ospf database link self-originate 

            OSPFv3 Router with ID (10.3.3.3) (Process ID 1)

                Link (Type-8) Link States (Area 2)

  LS age: 650
  Options: (V6-Bit, R-Bit, DC-Bit)
  LS Type: Link-LSA (Interface: GigabitEthernet0/0)
  Link State ID: 2 (Interface ID)
  Advertising Router: 10.3.3.3
  LS Seq Number: 80000005
  Checksum: 0x8578
  Length: 56
  Router Priority: 1
  Link Local Address: FE80::5054:FF:FE00:3A
  Number of Prefixes: 1
  Prefix Address: FD01:ABAB::
  Prefix Length: 64, Options: None

    由于末节路由器属于完全残域，因此，ABR1 路由器仅将默认路由发送到末节路由器。

    Stub_Router#show ipv6 route
IPv6 Routing Table - default - 5 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
       B - BGP, HA - Home Agent, MR - Mobile Router, R - RIP
       H - NHRP, I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea
       IS - ISIS summary, D - EIGRP, EX - EIGRP external, NM - NEMO
       ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect
       RL - RPL, O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1
       OE2 - OSPF ext 2, ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
       la - LISP alt, lr - LISP site-registrations, ld - LISP dyn-eid
       lA - LISP away, a - Application
OI ::/0 [110/2] via FE80::5054:FF:FE00:15, GigabitEthernet0/0
C   FD01:ABAB::/64 [0/0]
     via GigabitEthernet0/0, directly connected
L   FD01:ABAB::5054:FF:FE00:3A/128 [0/0]
     via GigabitEthernet0/0, receive
O   FD02:ABAB::/64 [110/2]
     via FE80::5054:FF:FE00:15, GigabitEthernet0/0
L   FF00::/8 [0/0]
     via Null0, receive

    ABR1 路由器是区域边界路由器。

    ABR1#show ipv6 ospf 
 Routing Process "ospfv3 1" with ID 10.1.1.1
 Supports NSSA (compatible with RFC 3101)
 Supports Database Exchange Summary List Optimization (RFC 5243)
 Event-log enabled, Maximum number of events: 1000, Mode: cyclic
 It is an area border router
 Router is not originating router-LSAs with maximum metric
 Initial SPF schedule delay 50 msecs
 Minimum hold time between two consecutive SPFs 200 msecs
 Maximum wait time between two consecutive SPFs 5000 msecs
 Initial LSA throttle delay 50 msecs
 Minimum hold time for LSA throttle 200 msecs
 Maximum wait time for LSA throttle 5000 msecs
 Minimum LSA arrival 100 msecs
 LSA group pacing timer 240 secs
 Interface flood pacing timer 33 msecs
 Retransmission pacing timer 66 msecs
 Retransmission limit dc 24 non-dc 24
 EXCHANGE/LOADING adjacency limit: initial 300, process maximum 300
 Number of external LSA 2. Checksum Sum 0x011699
 Number of areas in this router is 2. 1 normal 1 stub 0 nssa
 Graceful restart helper support enabled
 Reference bandwidth unit is 100 mbps
 RFC1583 compatibility enabled
    Area BACKBONE(0)
        Number of interfaces in this area is 1
        SPF algorithm executed 17 times
        Number of LSA 8. Checksum Sum 0x05579B
        Number of DCbitless LSA 0
        Number of indication LSA 0
        Number of DoNotAge LSA 0
        Flood list length 0
    Area 2
        Number of interfaces in this area is 1
        It is a stub area, no summary LSA in this area
        Generates stub default route with cost 1
        SPF algorithm executed 20 times
        Number of LSA 7. Checksum Sum 0x0380EA
        Number of DCbitless LSA 0
        Number of indication LSA 0
        Number of DoNotAge LSA 0
        Flood list length 0

    ABR1 路由器从 ASBR 路由器接收外部路由（RIP 路由）。

    ABR1#show ipv6 route
IPv6 Routing Table - default - 8 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
       B - BGP, R - RIP, H - NHRP, I1 - ISIS L1
       I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary, D - EIGRP
       EX - EIGRP external, ND - ND Default, NDp - ND Prefix, DCE - Destination
       NDr - Redirect, RL - RPL, O - OSPF Intra, OI - OSPF Inter
       OE1 - OSPF ext 1, OE2 - OSPF ext 2, ON1 - OSPF NSSA ext 1
       ON2 - OSPF NSSA ext 2, la - LISP alt, lr - LISP site-registrations
       ld - LISP dyn-eid, lA - LISP away, le - LISP extranet-policy
       lp - LISP publications, a - Application, m - OMP
O   FD01:ABAB::/64 [110/2]
     via FE80::5054:FF:FE00:3A, GigabitEthernet2
C   FD02:ABAB::/64 [0/0]
     via GigabitEthernet2, directly connected
L   FD02:ABAB::5054:FF:FE00:15/128 [0/0]
     via GigabitEthernet2, receive
C   FD03::/124 [0/0]
     via GigabitEthernet1, directly connected
L   FD03::1/128 [0/0]
     via GigabitEthernet1, receive
OE1 FD03::1:0/124 [110/26] via FE80::5054:FF:FE00:3E, GigabitEthernet1 OE1 FD04:ABAB::/64 [110/26] via FE80::5054:FF:FE00:3E, GigabitEthernet1
L   FF00::/8 [0/0]
     via Null0, receive

    ASBR 路由器是网络的自治系统边界路由器。它通过 Serial 0/0 接口连接到 RIP 网络。

    ASBR#show ipv6 ospf 
 Routing Process "ospfv3 1" with ID 10.2.2.2
 Supports NSSA (compatible with RFC 3101)
 Supports Database Exchange Summary List Optimization (RFC 5243)
 Event-log enabled, Maximum number of events: 1000, Mode: cyclic
 It is an autonomous system boundary router
 Redistributing External Routes (with default metric 25) from,
    rip EXT with metric-type 1 include-connected
 Router is not originating router-LSAs with maximum metric
 Initial SPF schedule delay 50 msecs
 Minimum hold time between two consecutive SPFs 200 msecs
 Maximum wait time between two consecutive SPFs 5000 msecs
 Initial LSA throttle delay 50 msecs
 Minimum hold time for LSA throttle 200 msecs
 Maximum wait time for LSA throttle 5000 msecs
 Minimum LSA arrival 100 msecs
 LSA group pacing timer 240 secs
 Interface flood pacing timer 33 msecs
 Retransmission pacing timer 66 msecs
 Retransmission limit dc 24 non-dc 24
 EXCHANGE/LOADING adjacency limit: initial 300, process maximum 300
 Number of external LSA 2. Checksum Sum 0x011699
 Number of areas in this router is 1. 1 normal 0 stub 0 nssa
 Graceful restart helper support enabled
 Reference bandwidth unit is 100 mbps
 RFC1583 compatibility enabled
    Area BACKBONE(0)
        Number of interfaces in this area is 1
        SPF algorithm executed 10 times
        Number of LSA 8. Checksum Sum 0x05579B
        Number of DCbitless LSA 0
        Number of indication LSA 0
        Number of DoNotAge LSA 0
        Flood list length 0

    ASBR#show ipv6 rip
RIP process "EXT", port 521, multicast-group FF02::9, pid 678
     Administrative distance is 120. Maximum paths is 16
     Updates every 30 seconds, expire after 180
     Holddown lasts 0 seconds, garbage collect after 120
     Split horizon is on; poison reverse is off
     Default routes are not generated
     Periodic updates 267, trigger updates 11
     Full Advertisement 1, Delayed Events 0
  Interfaces:
    GigabitEthernet2
  Redistribution:
    Redistributing protocol ospf 1 with transparent metric (internal, external 1 & 2, ) include-connected

    故障排除

    使用本部分可排除配置故障。

    注意：在使用debug命令之前，请参阅有关Debug命令的重要信息。

    debug ipv6

    在末节路由器上启用 OSPFv3 之后，即发送 OSPFv3 类型 1 Hello 消息到 FF02::5 多播地址。收到来自ABR1路由器的Hello数据包后，它们会协商主/辅助关系，然后开始发送DBD数据包。

    Stub_Router#debug ipv6 ospf events
Stub_Router#debug ipv6 ospf packet
    Stub_Router#debug ipv6 ospf adj
    *Mar  8 17:47:01.324: OSPFv3-1-IPv6 PAK  : Gi0/0: OUT: FE80::5054:FF:FE00:3A->FF02::5: ver:3 type:1 len:36 rid:10.3.3.3 area:0.0.0.2 chksum:A0F9 inst:0
*Mar  8 17:47:03.307: OSPFv3-1-IPv6 PAK  : Gi0/0:  IN: FE80::5054:FF:FE00:15->FF02::5: ver:3 type:1 len:36 rid:10.1.1.1 area:0.0.0.2 chksum:A31C inst:0
*Mar  8 17:47:03.308: OSPFv3-1-IPv6 ADJ   Gi0/0: Added 10.1.1.1 to nbr list
*Mar  8 17:47:03.308: OSPFv3-1-IPv6 PAK  : Gi0/0: OUT: FE80::5054:FF:FE00:3A->FE80::5054:FF:FE00:15: ver:3 type:1 len:40 rid:10.3.3.3 area:0.0.0.2 chksum:470D inst:0
*Mar  8 17:47:03.320: OSPFv3-1-IPv6 PAK  : Gi0/0:  IN: FE80::5054:FF:FE00:15->FE80::5054:FF:FE00:3A: ver:3 type:1 len:40 rid:10.1.1.1 area:0.0.0.2 chksum:4707 inst:0
*Mar  8 17:47:03.321: OSPFv3-1-IPv6 ADJ   Gi0/0: 2 Way Communication to 10.1.1.1, state 2WAY
*Mar  8 17:47:03.321: OSPFv3-1-IPv6 ADJ   Gi0/0: Nbr 10.1.1.1: Prepare dbase exchange
*Mar  8 17:47:03.322: OSPFv3-1-IPv6 ADJ   Gi0/0: Send DBD to 10.1.1.1 seq 0x983C9C0 opt 0x11 flag 0x7 len 28
*Mar  8 17:47:03.322: OSPFv3-1-IPv6 PAK  : Gi0/0: OUT: FE80::5054:FF:FE00:3A->FE80::5054:FF:FE00:15: ver:3 type:2 len:28 rid:10.3.3.3 area:0.0.0.2 chksum:7A33 inst:0
*Mar  8 17:47:03.328: OSPFv3-1-IPv6 PAK  : Gi0/0:  IN: FE80::5054:FF:FE00:15->FE80::5054:FF:FE00:3A: ver:3 type:2 len:148 rid:10.1.1.1 area:0.0.0.2 chksum:141A inst:0
*Mar  8 17:47:03.329: OSPFv3-1-IPv6 ADJ   Gi0/0: Rcv DBD from 10.1.1.1 seq 0x983C9C0 opt 0x11 flag 0x2 len 148 mtu 1500 state EXSTART
*Mar  8 17:47:03.330: OSPFv3-1-IPv6 ADJ   Gi0/0: NBR Negotiation Done. We are the MASTER
*Mar  8 17:47:03.330: OSPFv3-1-IPv6 ADJ   Gi0/0: Nbr 10.1.1.1: Summary list built, size 7
*Mar  8 17:47:03.331: OSPFv3-1-IPv6 ADJ   Gi0/0: Send DBD to 10.1.1.1 seq 0x983C9C1 opt 0x11 flag 0x1 len 128
*Mar  8 17:47:03.331: OSPFv3-1-IPv6 PAK  : Gi0/0: OUT: FE80::5054:FF:FE00:3A->FE80::5054:FF:FE00:15: ver:3 type:2 len:128 rid:10.3.3.3 area:0.0.0.2 chksum:F771 inst:0
*Mar  8 17:47:03.334: OSPFv3-1-IPv6 PAK  : Gi0/0:  IN: FE80::5054:FF:FE00:15->FE80::5054:FF:FE00:3A: ver:3 type:3 len:64 rid:10.1.1.1 area:0.0.0.2 chksum:C6FA inst:0
*Mar  8 17:47:03.335: OSPFv3-1-IPv6 PAK  : Gi0/0:  IN: FE80::5054:FF:FE00:15->FE80::5054:FF:FE00:3A: ver:3 type:2 len:28 rid:10.1.1.1 area:0.0.0.2 chksum:7C3D inst:0

    DBD 数据包交换之后，路由器即发送链路状态请求 (LS REQ) 和链路状态更新 (LS UPD) 消息，以建立其 LSDB。在连续的 LS REQ 和 LS UPD 消息之后且状态达到 FULL 时，路由器继续交换 Hello 数据包。

    Stub_Router#
    *Mar  8 17:47:03.337: OSPFv3-1-IPv6 ADJ   Gi0/0: Rcv LS REQ from 10.1.1.1 length 64 LSA count 4
*Mar  8 17:47:03.337: OSPFv3-1-IPv6 ADJ   Gi0/0: Send LS UPD to FE80::5054:FF:FE00:15 length 172 LSA count 4
*Mar  8 17:47:03.338: OSPFv3-1-IPv6 PAK  : Gi0/0: OUT: FE80::5054:FF:FE00:3A->FE80::5054:FF:FE00:15: ver:3 type:4 len:172 rid:10.3.3.3 area:0.0.0.2 chksum:D2CE inst:0
*Mar  8 17:47:03.339: OSPFv3-1-IPv6 ADJ   Gi0/0: Rcv DBD from 10.1.1.1 seq 0x983C9C1 opt 0x11 flag 0x0 len 28 mtu 1500 state EXCHANGE
*Mar  8 17:47:03.339: OSPFv3-1-IPv6 ADJ   Gi0/0: Exchange Done with 10.1.1.1 *Mar  8 17:47:03.340: OSPFv3-1-IPv6 ADJ   Gi0/0: Send LS REQ to 10.1.1.1 length 40
*Mar  8 17:47:03.340: OSPFv3-1-IPv6 PAK  : Gi0/0: OUT: FE80::5054:FF:FE00:3A->FE80::5054:FF:FE00:15: ver:3 type:3 len:40 rid:10.3.3.3 area:0.0.0.2 chksum:FD46 inst:0
*Mar  8 17:47:03.343: OSPFv3-1-IPv6 PAK  : Gi0/0:  IN: FE80::5054:FF:FE00:15->FE80::5054:FF:FE00:3A: ver:3 type:4 len:72 rid:10.1.1.1 area:0.0.0.2 chksum:825E inst:0
*Mar  8 17:47:03.345: OSPFv3-1-IPv6 ADJ   Gi0/0: Rcv LS UPD from Nbr ID 10.1.1.1 length 72 LSA count 2
*Mar  8 17:47:03.345: OSPFv3-1-IPv6 ADJ   Gi0/0: Synchronized with 10.1.1.1, state FULL
*Mar  8 17:47:03.346: %OSPFv3-5-ADJCHG: Process 1, Nbr 10.1.1.1 on GigabitEthernet0/0 from LOADING to FULL, Loading Done

    相关信息

    修订历史记录

    版本 发布日期 备注
    3.0
    09-Mar-2023
    已替换所有输出代码。重新认证。
    1.0
    10-Aug-2010
    初始版本
    TAC Authored

    由思科工程师提供

    • Julio Jimenez
      思科项目经理

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