CCNP-18 IS-IS试验1
试验拓扑:
试验要求:
R1 R2
为区域
49.0001
中的
IS
,
R3
为区域
49.0002
中的
IS
,并且把
R1
只配之成为
Level-1
路由器,
R3
为
Level-2
路由器,
R1
与
R2
之间的链路配置成为
L1
链路,
R2
与
R3
之间的链路配置成为
L2
链路。
试验目的:掌握
ISIS
基本的配置方法。
实验配置:
R1
:
R1(config)#clns routing
R1(config)#router isis
R1(config-router)#net 49.0001.1111.1111.1111.00
R1(config-router)#is-type level-1
R1(config-router)#exit
R1(config)#int f0/0
R1(config-if)#clns router isis
R1(config-if)# isis circuit-type level-1
R1(config-if)#no shu
R1(config-if)#exit
R2
:
R2(config)#clns routing
R2(config)#router isis
R2(config-router)#net 49.0001.2222.2222.2222.00
R2(config-router)#exit
R2(config)#int f0/0
R2(config-if)#clns router isis
R2(config-if)# isis circuit-type level-1
R2(config-if)#no shu
R2(config-if)#exit
R2(config)#int s1/0
R2(config-if)#clns router isis
R2(config-if)#clock rate 64000
R2(config-if)#no shu
R2(config-if)# isis circuit-type level-2-only
R2(config-if)#end
R3
:
R3(config)#clns routing
R3(config)#router isis
R3(config-router)#net 49.0002.3333.3333.3333.00
R3(config-router)#is-type level-2-only
R3(config-router)#exit
R3(config)#int s1/0
R3(config-if)#clns router isis
R3(config-if)# isis circuit-type level-2-only
R3(config-if)#no shu
R3(config-if)#exit
以上为
ISIS
的基本配置,
ISIS
路由器默认为
level-1-2
,可以通过路由器配置模式下命令
is-type
来进行修改,接口的
ISIS
类型默认也为
level-1-2
,同样可以通过接口配置模式下命令
isis circuit-type
进行修改。下面我们在每台路由器上
show clns neighbors
查看
clns
邻居关系:
R1#show clns neighbors
System Id Interface SNPA State Holdtime Type Protocol
R2 Fa0/0 ca00.07b8.0000 Up 18 L 1 IS-IS
R2#show clns neighbors
System Id Interface SNPA State Holdtime Type Protocol
R1 Fa0/0 ca 00.06a 4.0000 Up 26 L 1 IS-IS
R3 Se1/0 *HDLC* Up 21 L 2 IS-IS
R3#show clns neighbors
System Id Interface SNPA State Holdtime Type Protocol
R2 Se1/0 *HDLC* Up 25 L 2 IS-IS
OK
,都成功建立了邻居关系,需要注意的是
SNPA
的区别,在
LAN
环境下为
LAN
接口的
MAC
地址,
WAN
环境下为
DLCI
或者
HDLC
。
Show clns interface
命令查看接口的
CLNS
运行情况:
R1#show clns interface
FastEthernet0/0 is up, line protocol is up
Checksums enabled, MTU 1497, Encapsulation SAP
ERPDUs enabled, min. interval 10 msec.
RDPDUs enabled, min. interval 100 msec., Addr Mask enabled
Congestion Experienced bit set at 4 packets
CLNS fast switching enabled
CLNS SSE switching disabled
DEC compatibility mode OFF for this interface
Next ESH/ISH in 23 seconds
Routing Protocol: IS-IS
Circuit Type: level-1
Interface number 0x0, local circuit ID 0x1
Level-1 Metric: 10, Priority: 64, Circuit ID: R2.01
Level-1 IPv6 Metric: 10
Number of active level-1 adjacencies: 1
Next IS-IS LAN Level-1 Hello in 3 seconds
R2#show clns interface
FastEthernet0/0 is up, line protocol is up
Checksums enabled, MTU 1497, Encapsulation SAP
ERPDUs enabled, min. interval 10 msec.
RDPDUs enabled, min. interval 100 msec., Addr Mask enabled
Congestion Experienced bit set at 4 packets
CLNS fast switching enabled
CLNS SSE switching disabled
DEC compatibility mode OFF for this interface
Next ESH/ISH in 5 seconds
Routing Protocol: IS-IS
Circuit Type: level-1
Interface number 0x0, local circuit ID 0x1
Level-1 Metric: 10, Priority: 64, Circuit ID: R2.01
Level-1 IPv6 Metric: 10
Number of active level-1 adjacencies: 1
Next IS-IS LAN Level-1 Hello in 3 seconds
Serial1/0 is up, line protocol is up
Checksums enabled, MTU 1500, Encapsulation HDLC
ERPDUs enabled, min. interval 10 msec.
RDPDUs enabled, min. interval 100 msec., Addr Mask enabled
Congestion Experienced bit set at 4 packets
CLNS fast switching enabled
CLNS SSE switching disabled
DEC compatibility mode OFF for this interface
Next ESH/ISH in 6 seconds
Routing Protocol: IS-IS
Circuit Type: level-2
Interface number 0x1, local circuit ID 0x100
Neighbor System-ID: R3
Level-2 Metric: 10, Priority: 64, Circuit ID: R2.00
Level-2 IPv6 Metric: 10
Number of active level-2 adjacencies: 1
Next IS-IS Hello in 6 seconds
if state UP
R3#show clns interface
FastEthernet0/0 is administratively down, line protocol is down
CLNS protocol processing disabled
Serial1/0 is up, line protocol is up
Checksums enabled, MTU 1500, Encapsulation HDLC
ERPDUs enabled, min. interval 10 msec.
RDPDUs enabled, min. interval 100 msec., Addr Mask enabled
Congestion Experienced bit set at 4 packets
CLNS fast switching enabled
CLNS SSE switching disabled
DEC compatibility mode OFF for this interface
Next ESH/ISH in 13 seconds
Routing Protocol: IS-IS
Circuit Type: level-2
Interface number 0x0, local circuit ID 0x100
Neighbor System-ID: R2
Level-2 Metric: 10, Priority: 64, Circuit ID: R3.00
Level-2 IPv6 Metric: 10
Number of active level-2 adjacencies: 1
Next IS-IS Hello in 4 seconds
if state UP
我们从上面的输出可以知道接口的
CLNS
和
ISIS
的信息,比如链路类型,邻居
system-id
,度量值等等。
再用
show isis database
查看每台路由器的
LSDB
:
R1#show isis database
IS-IS Level-1 Link State Database:
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
R1.00-00 * 0x00000004 0x9046 1163 0/0/0
R2.00-00 0x00000003 0x39CE 1161 0/0/0
R2.01-00 0x00000001 0x2630 1162 0/0/0
R2#show isis database
IS-IS Level-1 Link State Database:
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
R1.00-00 0x00000004 0x9046 1150 0/0/0
R2.00-00 * 0x00000004 0x3FBF 1192 1/0/0
R2.01-00 * 0x00000001 0x2630 1153 0/0/0
IS-IS Level-2 Link State Database:
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
R2.00-00 * 0x00000002 0x9767 1187 0/0/0
R3.00-00 0x00000002 0xDC20 1186 0/0/0
R3#show isis database
IS-IS Level-2 Link State Database:
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
R2.00-00 0x00000002 0x9767 1185 0/0/0
R3.00-00 * 0x00000002 0xDC20 1186 0/0/0
注意用红颜色标记的部分,表示
R2
为伪节点。
最后我们查看
clns
路由表:
R1#show clns route
Codes: C - connected, S - static, d - DecnetIV
I - ISO-IGRP, i - IS-IS, e - ES-IS
B - BGP, b - eBGP-neighbor
C 49.0001.1111.1111.1111.00 [1/0], Local IS-IS NET
C 49.0001 [2/0], Local IS-IS Area
R2#show clns route
Codes: C - connected, S - static, d - DecnetIV
I - ISO-IGRP, i - IS-IS, e - ES-IS
B - BGP, b - eBGP-neighbor
C 49.0001.2222.2222.2222.00 [1/0], Local IS-IS NET
C 49.0001 [2/0], Local IS-IS Area
i 49.0002 [110/10]
via R3, Serial1/0
R3#show clns route
Codes: C - connected, S - static, d - DecnetIV
I - ISO-IGRP, i - IS-IS, e - ES-IS
B - BGP, b - eBGP-neighbor
C 49.0002.3333.3333.3333.00 [1/0], Local IS-IS NET
C 49.0002 [2/0], Local IS-IS Area
i 49.0001 [110/10]
via R2, Serial1/0
show clns route
是用来查看
L2
的路由信息,因为
R1
为
L1
的路由器,所以在
R1
上看不到有关
L2
的信息,
但是在
R2 R3
上能看到一条
L2
的路由信息。下面在
R1
上进行
ping
验证:
R1#ping clns 49.0002.3333.3333.3333.00
Type escape sequence to abort.
Sending 5, 100-byte CLNS Echos with timeout 2 seconds
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 192/241/344 ms
通了,可以到
R3
。
实验总结:掌握基本的
ISIS
配置和一些验证
ISIS
配置正确的命令。