Configuring Static Route - 3Com 8807 Configuration Manual

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HAPTER TATIC
Configuring Static
Route
Configuring a Static
Route
R C
OUTE ONFIGURATION
this packet will be discarded, and an internet control message protocol (ICMP)
packet will be sent to the originating host to inform that the destination host or
network is unreachable.
Static Route Configuration includes:
"Configuring a Static Route"
■
"Configuring a Default Route"
■
"Deleting All the Static Routes"
■
Perform the following configurations in system view.
Table 249 Configure a static route
Operation
Add a static route
Delete a static route
The parameters are explained as follows:
IP address and mask
■
The IP address and mask are in a dotted decimal format. As "1"s in the 32-bit
mask is required to be consecutive, the dotted decimal mask can also be replaced
by the mask-length (which refers to the digits of the consecutive "1"s in the
mask).
Next hop address and NULL interface
■
When configuring a static route, you can specify the gateway-address to decide
the next hop address, depending on the actual conditions.
In fact, for all the routing entries, the next hop address must be specified. When IP
layer transmits an IP packet, it will first search the matching route in the routing
table according to the destination address of the packet. Only when the next hop
address of the route is specified can the link layer find the corresponding link layer
address, and then forward the packet according to this address.
The packets sent to NULL interface, a kind of virtual interface, will be discarded at
once. This can decrease the system load.
Preference
■
Depending on the configuration of preference, you can achieve different route
management policies. For example, to implement load sharing, you can specify
the same preference for multiple routes to the same destination network. To
implement route backup, you can specify different preferences for them.
Command
ip route-static [ vpn-instance vpn-instance-name-list ] ip-address {
mask | mask-length } { interface-type interface-number | [
vpn-instance vpn-instance-name ] gateway-address } [ preference
preference-value ] [ reject | blackhole ]
undo ip route-static [ vpn-instance vpn-instance-name-list ]
ip-address { mask | mask-length } { interface-type interface-number |
[ vpn-instance vpn-instance-name ] gateway-address } [
preference preference-value ] [ reject | blackhole ]