H3C Technologies H3C S3100 Series Switches - Manual (Page 265)

Operation Manual – Routing Protocol
H3C S3100-52P Ethernet Switch Chapter 1 IP Routing Protocol Overview
1-4
10.0.0.0
11.0.0.0
12.0.0.0
13.0.0.0
14.0.0.0
15.0.0.0
16.0.0.0
R8
2
10.0.0.1
1
11.0.0.1
3
13.0.0.4
R2
R3
R5
R6 R7
R1 R4
10.0.0.2
16.0.0.3 16.0.0.1
16.0.0.2
13.0.0.3
15.0.0.1
15.0.0.2
14.0.0.1
14.0.0.2
13.0.0.2
13.0.0.1
12.0.0.1
12.0.0.2
12.0.0.3
Routing table of router R8
Destination
network
10.0.0.0
Next hop Interf ace
10.0.0.1 2
11.0.0.0 11.0.0.1 1
12.0.0.0 11.0.0.2 1
11.0.0.2
13.0.0.0 13.0.0.4 3
14.0.0.0 13.0.0.2 3
15.0.0.0 13.0.0.2 3
16.0.0.0 10.0.0.2 2
10.0.0.0
11.0.0.0
12.0.0.0
13.0.0.0
14.0.0.0
15.0.0.0
16.0.0.0
R8
2
10.0.0.1
1
11.0.0.1
3
13.0.0.4
R2
R3
R5
R6 R7
R1 R4
10.0.0.2
16.0.0.3 16.0.0.1
16.0.0.2
13.0.0.3
15.0.0.1
15.0.0.2
14.0.0.1
14.0.0.2
13.0.0.2
13.0.0.1
12.0.0.1
12.0.0.2
12.0.0.3
Routing table of router R8
Destination
network
10.0.0.0
Next hop Interf ace
10.0.0.1 2
11.0.0.0 11.0.0.1 1
12.0.0.0 11.0.0.2 1
11.0.0.2
13.0.0.0 13.0.0.4 3
14.0.0.0 13.0.0.2 3
15.0.0.0 13.0.0.2 3
16.0.0.0 10.0.0.2 2
10.0.0.0
11.0.0.0
12.0.0.0
13.0.0.0
14.0.0.0
15.0.0.0
16.0.0.0
R8
2
10.0.0.1
1
11.0.0.1
3
13.0.0.4
R2
R3
R5
R6 R7
R1 R4
10.0.0.2
16.0.0.3 16.0.0.1
16.0.0.2
13.0.0.3
15.0.0.1
15.0.0.2
14.0.0.1
14.0.0.2
13.0.0.2
13.0.0.1
12.0.0.1
12.0.0.2
12.0.0.3
Routing table of router R8
Destination
network
10.0.0.0
Next hop Interf ace
10.0.0.1 2
11.0.0.0 11.0.0.1 1
12.0.0.0 11.0.0.2 1
11.0.0.2
13.0.0.0 13.0.0.4 3
14.0.0.0 13.0.0.2 3
15.0.0.0 13.0.0.2 3
16.0.0.0 10.0.0.2 2
10.0.0.0
11.0.0.0
12.0.0.0
13.0.0.0
14.0.0.0
15.0.0.0
16.0.0.0
R8
2
10.0.0.1
1
11.0.0.1
3
13.0.0.4
R2
R3
R5
R6 R7
R1 R4
10.0.0.2
16.0.0.3 16.0.0.1
16.0.0.2
13.0.0.3
15.0.0.1
15.0.0.2
14.0.0.1
14.0.0.2
13.0.0.2
13.0.0.1
12.0.0.1
12.0.0.2
12.0.0.3
Routing table of router R8
Destination
network
10.0.0.0
Next hop Interf ace
10.0.0.1 2
11.0.0.0 11.0.0.1 1
12.0.0.0 11.0.0.2 1
11.0.0.2
13.0.0.0 13.0.0.4 3
14.0.0.0 13.0.0.2 3
15.0.0.0 13.0.0.2 3
16.0.0.0 10.0.0.2 2
Figure 1-2
Routing table
The H3C S3100-52P Ethernet Switches (hereinafter referred to as S3100-52P) support
the configuration of static routes as well as a series of dynamic routing protocols such
as RIP and OSPF. Moreover, the switches in operation can automatically obtain some
direct routes according to interface status and user configuration.
1.2 Routing Management Policy
On an S3100-52P Ethernet switch, you can manually configure a static route to a
certain destination, or configure a dynamic routing protocol to make the switch interact
with other routers in the internetwork and find routes by routing algorithm. On an
S3100-52P Ethernet switch, the static routes configured by the user and the dynamic
routes discovered by routing protocols are managed uniformly. The static routes and
the routes learned or configured by different routing protocols can also be shared
among routing protocols.
1.2.1 Routing Protocols and Preferences
Different routing protocols may discover different routes to the same destination, but
only one route among these routes and the static routes is optimal. In fact, at any given
moment, only one routing protocol can determine the current route to a specific
destination. Routing protocols (including static routing) are endowed with different
preferences. When there are multiple routing information sources, the route discovered
by the routing protocol with the highest preference will become the current route.
Routing protocols and their default route preferences (the smaller the value is, the
higher the preference is) are shown in Table 1-1.