H3C IS-IS配置1-基本功能配置举例

1.组网需求

  Switch A、Switch B、Switch C和Switch D属于同一自治系统，要求它们之间通过IS-IS协议达到IP网络互连的目的。

  Switch A和Switch B为Level-1交换机，Switch D为Level-2交换机，Switch C作为Level-1-2交换机将两个区域相连。Switch A、Switch B和Switch C的区域号为10，Switch D的区域号为20。

   

 2.配置步骤  

SW A
[SwitchA] isis 1
[SwitchA-isis-1] is-level level-1
[SwitchA-isis-1] network-entity 10.0000.0000.0001.00
[SwitchA-isis-1] quit
[SwitchA] interface vlan-interface 100
[SwitchA-Vlan-interface100] isis enable 1

SW B
[SwitchB] isis 1
[SwitchB-isis-1] is-level level-1
[SwitchB-isis-1] network-entity 10.0000.0000.0002.00
[SwitchB-isis-1] quit
[SwitchB] interface vlan-interface 200
[SwitchB-Vlan-interface200] isis enable 1

SW D
[SwitchD] isis 1
[SwitchD-isis-1] is-level level-2
[SwitchD-isis-1] network-entity 20.0000.0000.0004.00
[SwitchD-isis-1] quit
[SwitchD] interface vlan-interface 100
[SwitchD-Vlan-interface100] isis enable 1
[SwitchD-Vlan-interface100] quit
[SwitchD] interface vlan-interface 300
[SwitchD-Vlan-interface300] isis enable 1

SW C
[SwitchC] isis 1
[SwitchC-isis-1] network-entity 10.0000.0000.0003.00
[SwitchC-isis-1] quit
[SwitchC] interface vlan-interface 100
[SwitchC-Vlan-interface100] isis enable 1
[SwitchC-Vlan-interface100] quit
[SwitchC] interface vlan-interface 200
[SwitchC-Vlan-interface200] isis enable 1
[SwitchC-Vlan-interface200] quit
[SwitchC] interface vlan-interface 300
[SwitchC-Vlan-interface300] isis enable 1

3.配置验证

  1）显示各交换机的IS-IS LSDB信息，查看LSP是否完整。 

[SwitchA] display isis lsdb
                       Database information for IS-IS(1)
                       ---------------------------------
                          Level-1 Link State Database
                          ---------------------------

LSPID                 Seq Num      Checksum   Holdtime   Length  ATT/P/OL

--------------------------------------------------------------------------
0000.0000.0001.00-00* 0x00000004   0xdf5e     1096       68      0/0/0
0000.0000.0002.00-00  0x00000004   0xee4d     1102       68      0/0/0
0000.0000.0002.01-00  0x00000001   0xdaaf     1102       55      0/0/0
0000.0000.0003.00-00  0x00000009   0xcaa3     1161       111     1/0/0
0000.0000.0003.01-00  0x00000001   0xadda     1112       55      0/0/0

    *-Self LSP, +-Self LSP(Extended), ATT-Attached, P-Partition, OL-Overload

[SwitchC] display isis lsdb
                       Database information for IS-IS(1)
                       ---------------------------------
                          Level-1 Link State Database
                          ---------------------------
LSPID                 Seq Num      Checksum   Holdtime    Length  ATT/P/OL
--------------------------------------------------------------------------
0000.0000.0001.00-00  0x00000006   0xdb60     847         68      0/0/0
0000.0000.0002.00-00  0x00000008   0xe651     1053        68      0/0/0
0000.0000.0002.01-00  0x00000005   0xd2b3     1052        55      0/0/0
0000.0000.0003.00-00* 0x00000014   0x194a     1051        111     1/0/0
0000.0000.0003.01-00* 0x00000002   0xabdb     854         55      0/0/0

    *-Self LSP, +-Self LSP(Extended), ATT-Attached, P-Partition, OL-Overload
                          Level-2 Link State Database
                          ---------------------------
LSPID                 Seq Num      Checksum   Holdtime    Length  ATT/P/OL
--------------------------------------------------------------------------
0000.0000.0003.00-00* 0x00000012   0xc93c     842         100     0/0/0
0000.0000.0004.00-00  0x00000026   0x331      1173        84      0/0/0
0000.0000.0004.01-00  0x00000001   0xee95     668         55      0/0/0

    *-Self LSP, +-Self LSP(Extended), ATT-Attached, P-Partition, OL-Overload

  2）显示各交换机的IS-IS路由信息。Level-1交换机的路由表中应该有一条缺省路由，且下一跳为Level-1-2交换机，Level-2交换机的路由表中应该有所有Level-1和Level-2的路由。  

[SwitchA] display isis route
                         Route information for IS-IS(1)
                         ------------------------------
                         Level-1 IPv4 Forwarding Table
                         -----------------------------
 IPv4 Destination     IntCost    ExtCost ExitInterface   NextHop         Flags
-------------------------------------------------------------------------------
 10.1.1.0/24          10         NULL    Vlan100         Direct          D/L/-
 10.1.2.0/24          20         NULL    Vlan100         10.1.1.1        R/-/-
 192.168.0.0/24       20         NULL    Vlan100         10.1.1.1        R/-/-
 0.0.0.0/0            10         NULL    Vlan100         10.1.1.1        R/-/-
      Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down Bit Set

[SwitchC] display isis route
                         Route information for IS-IS(1)
                         ------------------------------
                         Level-1 IPv4 Forwarding Table
                         -----------------------------
 IPv4 Destination     IntCost    ExtCost ExitInterface   NextHop         Flags
-------------------------------------------------------------------------------
 192.168.0.0/24       10         NULL    Vlan300         Direct          D/L/-
 10.1.1.0/24          10         NULL    Vlan100         Direct          D/L/-
 10.1.2.0/24          10         NULL    Vlan200         Direct          D/L/-
      Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down Bit Set

                       Level-2 IPv4 Forwarding Table
                         -----------------------------
 IPv4 Destination     IntCost    ExtCost ExitInterface   NextHop         Flags
-------------------------------------------------------------------------------
 192.168.0.0/24       10         NULL                                    D/L/-
 10.1.1.0/24          10         NULL                                    D/L/-
 10.1.2.0/24          10         NULL                                    D/L/-
 172.16.0.0/16        20         NULL    Vlan300         192.168.0.2     R/-/-

      Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down Bit Set

[SwitchD] display isis route
                         Route information for IS-IS(1)
                         ------------------------------
                         Level-2 IPv4 Forwarding Table
                         -----------------------------
 IPv4 Destination     IntCost    ExtCost ExitInterface   NextHop         Flags
-------------------------------------------------------------------------------
 192.168.0.0/24       10         NULL    Vlan300         Direct          D/L/-
 10.1.1.0/24          20         NULL    Vlan300         192.168.0.1     R/-/-
 10.1.2.0/24          20         NULL    Vlan300         192.168.0.1     R/-/-
 172.16.0.0/16        10         NULL    Vlan100         Direct          D/L/-