Huawei Quidway S3500 Series Operation Manual page 166

Operation Manual - Routing Protocol
Quidway S3500 Series Ethernet Switches
129.102.8.10, the address of the network where the host or the router with the
mask 255.255.0.0 is located will be 129.102.0.0.
Output interface: It indicates an interface through which an IP packet should be
forwarded.
Next hop address: Indicates the next router that an IP packet will pass through.
Priority added to the IP routing table for a route: There may be different next hops
to the same destination. These routes may be discovered by different routing
protocols, or they can just be the static routes configured manually. The one with
the highest priority (the smallest numerical value) will be selected as the current
optimal route.
According to different destinations, the routes can be divided into the following:
Subnet route: The destination is a subnet.
Host route: The destination is a host
In addition, according to whether the network of the destination host is directly
connected to the router, there are the following types of routes:
Direct route: The router is directly connected to the network where the destination
locates.
Indirect route: The router is not directly connected to the network where the
destination locates.
In order to limit the size oft the routing table, an option is available to set a default route.
All the packets that fail to find the suitable entry will be forwarded through this default
route.
In a complicated Internet as shown in the following figure, the number in each network
is the network address. The router R8 is connected with three networks, so it has three
IP addresses and three physical ports, and its routing table is shown in the diagram
below:
Huawei Technologies Proprietary
1-3
Chapter 1 IP Routing Protocol Overview