3Com Router 3031, Справочник по командам

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RIP Configuration Commands 545
can be specified. But for NBMA interfaces, such as the interface or dialing
interface encapsulated with X.25 or frame-relay, they support
point-to-multi-point. Except IP route is configured, secondary route, i.e. the
map from IP address to link layer address should be established on link layer. In
such condition, transmission interface cannot be specified and the next hop IP
address should be configured when configuring static route.
■
VT interface cannot be configured as outbound interface.
In some conditions (for example, the link layer is encapsulated with PPP),
transmission interface can be specified when opposite address cannot be learned
in router configuration. After specifying transmission interface, the configuration
of this router is unnecessary to be modified as opposite address changes.
For the related command, see display ip routing-table .
Example
Configure the next hop of the default route as 129.102.0.2.
[3Com] ip route-static 0.0.0.0 0.0.0.0 129.102.0.2
Configure the static route, whose destination address is 100.1.1.1
and whose next-hop address is 1.1.1.2.
[3Com] ip route-static vpn-instance vpn1 100.1.1.1 16 vpn-instance
vpn1 1.1.1.2
RIP Configuration
Commands
For the specific examples and parameter explanation of VPN instance, refer to
“MPLS” module of this manual.
checkzero Syntax
checkzero
undo checkzero
View
RIP view
Parameter
None
Description
Using the checkzero command, you can check the zero field of RIP-1 packet. Using
the undo checkzero command, you can cancel the check of the zero fields.
By default, RIP-1 performs the zero field check.
According to the protocol (RFC1058) specifications, some fields in RIP-1 packets
must be zero, called zero fields. With the checkzero command, the zero check
operation for RIP-1 packet can be enabled or disabled. During the zero check
operation, if the RIP-1 packet in which the zero fields are not zeros is received, it
will be rejected.
This command is ineffective to RIP-2 since RIP-2 packets have no zero fields.