Shulou(Shulou.com)06/02 Report--

OPSF routing protocols: internal Gateway Protocol and external Gateway Protocol

Autonomous system: that is, multiple routes are regarded as a whole, and multiple routes running in a whole are all the same protocol.

AS area system: areas running with the same routing process protocol

Interior Gateway Protocol (IGP): and RIP OSPF ISIS

External Gateway Protocol (EGP): and BGP

OSPF is a link-state routing protocol: it forwards its own information base and does not load the routing table.

The working process of OPSF:

Establish adjacency-"link-state database -" shortest path tree-"routing table"

(learning link state information) (Dijkstra algorithm)

OPSF: open shortest path first selection protocol.

OSPF area: in order to adapt to the large network OSPF dividing multiple areas within the AS, each OSPF router maintains only complete link-state information of the area in which it is located

Area 0 (backbone area): all areas of the core area (OSPF) should be connected to the backbone area.

Backbone area: there can be only one, which is responsible for the dissemination of routing information between areas.

Non-backbone areas (standard areas): areas other than backbone areas.

Router ID: the IP address that uniquely identifies the router in the ospf area.

Purpose: interworking between PC1 and PC2.

Experimental environment:

1.GNS3 software

2.2 initialized PC hosts + 4 routers

3. If the host is using a virtual machine, then all the firewalls of the virtual machine need to be turned off, otherwise the data transmission will be affected later.

The process of the experiment:

1.GNS3 software, 2 PC hosts + 4 routers ready

two。 We connect them all with a network cable, define each IP address according to our personal preference, write it next to the port, and then enter the IP address and check it ourselves.

3. Configure the R1~R4 router with an IP address

R1

R2

R3

R4

4 configure router ID for R1~R4

R1

R2

R3

R4

5. Announce the network segment of R1~R4 with OSPF protocol

R1

R2 is going to declare two regions, one is area 0 and one area 1.

R3

R4 is in the same two areas as R2.

6. After configuration, use show ip route to check the routing table of R1~R4 to see if there are 10-60 network segments. If there is less than 10, add 10 network segments on R1. Add a minimum of 60 on R3 as long as there are all the network segments in the R1~R4 routing table indicating that PC1 can interoperate with PC2.

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