Static Route Summary Example - Zte ZXR10 5900E Series User Manual

Chapter 1 Static Route Configuration
The above two commands configure two different static routes to
the same network. The first command does not configure admin-
istrative distance value, so default value 1 is applied. The second
command configures the administrative distance value to be 25.
The administrative distance value of the first route is smaller
than that of the second one, so only the information of the
first route is available in the routing table. That is to say, the
router reaches the destination network 192.168.6.0/24 through
next-hop 192.168.4.2. The second route will be available in
the routing table only when the first route becomes invalid and
disappears from the routing table.

Static Route Summary Example

Static route is a special static route which summaries two or more
specific route expressions into one expression thus reducing en-
tries of the routing table while keeping all of the original connec-
tions. Summary static route detail is given in Figure 2.
F 2 STATIC ROUTE SUMMARY
IGURE
As shown in Figure 2, R3 has two networks: 10.1.0.0/16 and
10.2.0.0/16. To make R1 access these networks, it is necessary
to configure the following two static routes for R1:
ZXR10_R1(config)#ip route 10.1.0.0 255.255.0.0
192.168.4.2
ZXR10_R1(config)#ip route 10.2.0.0 255.255.0.0
192.168.4.2
Suppose that R2, R3 has been configured normally, and the above
configuration can be used to complete IP connection. However,
static route summary can be used to optimize the routing table of
R1. The following command can be used to replace the above two
commands:
ZXR10_R1(config)#ip route 10.0.0.0 255.0.0.0 192.168.4.2
The above command shows that all packets to destination network
10.0.0.0/8 pass 192.168.4.2. It means that packets to subnets
(subnet 10.1.0.0/16 and subnet 10.2.0.0/16) of the destination
network 10.0.0.0/8 are sent to 192.168.4.2. In this way static
routes are used to summarize all subnets of the main network
10.0.0.0/8.
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