Operation Manual – Routing Protocol
H3C S5600 Series Ethernet Switches
Chapter 2 Static Route Configuration
2-2
z
Blackhole route: route with
blackhole
attribute. If a static route destined for a
destination has the
blackhole
attribute, the outgoing interface of this route is the
Null 0 interface regardless of the next hop address, and all the IP packets
addressed to this destination will be dropped without notifying the source hosts.
The attributes
reject
and
blackhole
are usually used to limit the range of the
destinations this router can reach, and help troubleshoot the network.
2.1.2 Default Route
To avoid too large a routing table, you can configure a default route.
When the destination address of a packet fails to match any entry in the routing table,
z
If there is default route in the routing table, the default route will be selected to
forward the packet.
z
If there is no default route, the packet will be discarded and an ICMP Destination
Unreachable or Network Unreachable packet will be returned to the source.
A default route can be manually configured or generated by some dynamic routing
protocols, such as OSPF and RIP.
2.2 Static Route Configuration
2.2.1 Configuration Prerequisites
Before configuring a static route, perform the following tasks:
z
Configuring the physical parameters of related interfaces
z
Configuring IP addresses for related interfaces
2.2.2 Configuring a Static Route
Follow these steps to configure a static route:
To do...
Use the command...
Remarks
Enter system view
system-view
—
Configure a static
route
ip route-static
ip-address
{
mask
|
mask-length
} {
interface-type
interface-number
|
next-hop
}
[
preference
preference-value
]
[
reject
|
blackhole
] [
detect-group
group number
] [
description
text
]
Required
By default, the system
can obtain the route to
the subnet directly
connected to the
router.