Cisco is-is basic configuration and re-release experiment

Introduction: like the standard OSPF protocol, the is-is protocol is a link-state dynamic routing protocol, but it is much optimized than OSPF, reducing the routing type and LSA flooding, it is also widely used in the current network.

Tutorial topology:

650) This. width = 650; "src =" http://s3.51cto.com/wyfs02/M02/49/20/wKioL1QPrKWg-uTRAAHkPOs26io388.jpg "Title =" 1.png" alt = "wKioL1QPrKWg-uTRAAHkPOs26io388.jpg"/>

Objective: To run the is-is protocol on the R1-R5 and the r12002 protocol on the R1-R6

2. re-release the route to achieve interconnection between R5 and R6

3. Cross-Domain and external route Aggregation

Tutorial steps: 1. Perform basic configuration and loopback on R1 to R6. (Omitted)

2. Run the is-is and rip protocols.

R1 (config) # router isis

R1 (config-router) # net 49.0001.0001.0001.0001.00 // specify the NSAP address, which is equivalent to the router ID

R1 (config-router) # ex

R1 (config) # int range F0/0, l0

R1 (config-if-range) # IP router ISIS // enter the interface and declare the CIDR Block

R2 (config) # router isis

R2 (config-router) # net 49.0001.0002.0002.0002.00

R2 (config-router) # ex

R2 (config) # int range F0/0-1, l0

R2 (config-if-range) # IP router isis

R3 (config) # router isis

R3 (config-router) # net 49.0000.0003.0003.0003.00

R3 (config-router) # ex

R3 (config) # int range F0/0-1, l0

R3 (config-if-range) # IP router isis

R4 (config) # router isis

R4 (config-router) # net 49.0000.0004.0004.0004.00

R4 (config-router) # ex

R4 (config) # int range F0/0-1, l0

R4 (config-if-range) # IP router isis

R5 (config) # router isis

R5 (config-router) # net 49.0002.0005.0005.0005.00

R5 (config-router) # ex

R5 (config) # int range F0/1, l0

R5 (config-if-range) # IP router isis

R1 (config) # router rip

R1 (config-router) # Version 2

R1 (config-router) # No auto-Summary

R1 (config-router) # network 16.0.0.0

R6 # conf t

Enter configuration commands, one per line. End with cntl/Z.

R6 (config) # router rip

R6 (config-router) # Version 2

R6 (config-router) # No auto-Summary

R6 (config-router) # network 16.0.0.0

R6 (config-router) # network 6.6.6.6

The is-is protocol can be optimized. Because the default level of the ISIS protocol router is Level 1-2, two types of LSP are sent at the same time, which is unnecessary, it is a waste of routing resources.

Change R1 to level 1

R1 (config) # router isis

R1 (config-router) # Is-type level-1 // modify the router's route selection level

Change R3 and R4 to Level 2

R3 (config) # router isis

R3 (config-router) # Is-type level-2

R4 (config) # router isis

R4 (config-router) # Is-type level-2

Change the F0/1 interface of R5 to level 2.

R5 # conf t

Enter configuration commands, one per line. End with cntl/Z.

R5 (config) # int F0/1

R5 (config-If) # ISIS circuit-type level-2-only // modify the interface selection level

3. Route re-release

R1 (config) # router isis

R1 (config-router) # redistribute rip?

Level-1 is-is level-1 routes only

Level-1-2 is-is level-1 and level-2 routes

Level-2 is-is level-2 routes only

Metric metric for redistributed routes

Metric-type OSPF/Is-Is exterior metric type for redistributed routes

Route-map route map reference

<CR>

R1 (config-router) # redistribute rip level-1

R1 (config-router) # ex

R1 (config) # router rip

R1 (config-router) # redistribute Isis?

Word ISO routing area tag

Level-1 is-is level-1 routes only

Level-1-2 is-is level-1 and level-2 routes

Level-2 is-is level-2 routes only

Metric metric for redistributed routes

Route-map route map reference

<CR>

R1 (config-router) # redistribute ISIS level-1 metric 2

Check R5 route table

R5 # Show IP Route

....

34.0.0.0/24 is subnetted, 1 subnets

I L2 34.0.0.0 [115/20] via 45.0.0.4, fastethernet0/1

16.0.0.0/24 is subnetted, 1 subnets

I L2 16.0.0.0 [115/40] via 45.0.0.4, fastethernet0/1

1.0.0.0/32 is subnetted, 1 subnets

I L2 1.1.1.1 [115/50] via 45.0.0.4, fastethernet0/1

2.0.0.0/24 is subnetted, 1 subnets

I L2 2.2.2.0 [115/40] via 45.0.0.4, fastethernet0/1

3.0.0.0/32 is subnetted, 1 subnets

I L2 3.3.3.3 [115/30] via 45.0.0.4, fastethernet0/1

4.0.0.0/32 is subnetted, 1 subnets

I L2 4.4.4.4 [115/20] via 45.0.0.4, fastethernet0/1

5.0.0.0/32 is subnetted, 1 subnets

C 5.5.5.5 is directly connected, loopback0

6.0.0.0/32 is subnetted, 1 subnets

I L2 6.6.6.6 [115/40] via 45.0.0.4, fastethernet0/1

23.0.0.0/24 is subnetted, 1 subnets

I L2 23.0.0.0 [115/30] via 45.0.0.4, fastethernet0/1

45.0.0.0/24 is subnetted, 1 subnets

C 45.0.0.0 is directly connected, fastethernet0/1

Test whether R5 can connect to R6.

R5 # P 6.6.6.6

Type escape sequence to abort.

Sending 5, 100-byte ICMP echos to 6.6.6.6, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/AVG/max = 88/122/140 MS

It can be seen that R5 has learned the route of R6.

4. Inter-Domain route summary and external route Summary

Assume there are four routes on R5, 192.168.0.1-192.168.3.1

Can be summarized on R5

R5 (config) # router isis

R5 (config-router) # Summary-address 192.168.0.0 255.255.252.0

At this time, you can view the route table on R4 and find a summary route.

R4 # Show IP R

* Mar 1 01:09:31. 227: % SYS-5-CONFIG_ I: configured from console by Console

R4 # Show IP Route

....

34.0.0.0/24 is subnetted, 1 subnets

C 34.0.0.0 is directly connected, fastethernet0/1

16.0.0.0/24 is subnetted, 1 subnets

I L2 16.0.0.0 [115/30] via 34.0.0.3, fastethernet0/1

1.0.0.0/32 is subnetted, 1 subnets

I L2 1.1.1.1 [115/40] via 34.0.0.3, fastethernet0/1

2.0.0.0/24 is subnetted, 1 subnets

I L2 2.2.2.0 [115/30] via 34.0.0.3, fastethernet0/1

3.0.0.0/32 is subnetted, 1 subnets

I L2 3.3.3.3 [115/20] via 34.0.0.3, fastethernet0/1

4.0.0.0/32 is subnetted, 1 subnets

C 4.4.4.4 is directly connected, loopback0

5.0.0.0/32 is subnetted, 1 subnets

I L2 5.5.5.5 [115/20] via 45.0.0.5, fastethernet0/0

6.0.0.0/32 is subnetted, 1 subnets

I L2 6.6.6.6 [115/30] via 34.0.0.3, fastethernet0/1

23.0.0.0/24 is subnetted, 1 subnets

I L2 23.0.0.0 [115/20] via 34.0.0.3, fastethernet0/1

12.0.0.0/24 is subnetted, 1 subnets

I L2 12.0.0.0 [115/30] via 34.0.0.3, fastethernet0/1

45.0.0.0/24 is subnetted, 1 subnets

C 45.0.0.0 is directly connected, fastethernet0/0

I L2 192.168.0.0/22 [115/20] via 45.0.0.5, fastethernet0/0

This can save vro resources.

Similarly, assume that there are four routes 172.16.0.1-172.16.3.1 on R6.

Route summary can be performed on r1

R1 (config) # router isis

R1 (config-router) # Summary-address 172.16.0.0 255.255.252.0 level-1

Note: When summarizing external routes, add level-X to the end; otherwise, the result is invalid.

Check whether the route summary takes effect on R2.

R2 # Show IP Route

.....

34.0.0.0/24 is subnetted, 1 subnets

I L2 34.0.0.0 [115/20] via 23.0.0.3, fastethernet0/0

16.0.0.0/24 is subnetted, 1 subnets

I L1 16.0.0.0 [115/10] via 12.0.0.1, fastethernet0/1

1.0.0.0/32 is subnetted, 1 subnets

I L1 1.1.1.1 [115/20] via 12.0.0.1, fastethernet0/1

2.0.0.0/24 is subnetted, 1 subnets

C 2.2.2.0 is directly connected, loopback0

3.0.0.0/32 is subnetted, 1 subnets

I L2 3.3.3.3 [115/20] via 23.0.0.3, fastethernet0/0

4.0.0.0/32 is subnetted, 1 subnets

I L2 4.4.4.4 [115/30] via 23.0.0.3, fastethernet0/0

5.0.0.0/32 is subnetted, 1 subnets

I L2 5.5.5.5 [115/40] via 23.0.0.3, fastethernet0/0

6.0.0.0/32 is subnetted, 1 subnets

I L1 6.6.6.6 [115/10] via 12.0.0.1, fastethernet0/1

23.0.0.0/24 is subnetted, 1 subnets

C 23.0.0.0 is directly connected, fastethernet0/0

172.16.0.0/22 is subnetted, 1 subnets

I L1 172.16.0.0 [115/10] via 12.0.0.1, fastethernet0/1

12.0.0.0/24 is subnetted, 1 subnets

C 12.0.0.0 is directly connected, fastethernet0/1

45.0.0.0/24 is subnetted, 1 subnets

I L2 45.0.0.0 [115/30] via 23.0.0.3, fastethernet0/0

I L2 192.168.0.0/22 [115/40] via 23.0.0.3, fastethernet0/0

Summary complete, experiment complete

This article is from the "ne Road" blog, please be sure to keep this source http://332162926.blog.51cto.com/8831013/1550436

Cisco is-is basic configuration and re-release experiment