Release 1.0
Configuring Interfaces and TCP/IP Features
526360-001-00 Rev. B
MGBI
5-15
MOT
(config-if)
#
clear ip route
{
*
| <
A.B.C.D
> | <
A.B.C.D>
<
A.B.C.D>
}
where:
* is the asterisk character that clears all routes in the routing table.
A.B.C.D
is the IP address of the route.
A.B.C.D
is the subnet mask of the IP address.
Configuring the Internet Control Message Protocol
The Internet Control Message Protocol (ICMP) allows a router or destination host to
report errors in data traffic processing to the original packet source. ICMP messages
occur when errors take place in processing an unfragmented data packet or in the first
fragment of a fragmented data packet. ICMP message delivery is not guaranteed. The
Router Discovery Protocol, enabled via ICMP, informs hosts of the existence of
routers by tracing router discovery packets.
Follow these sections to configure ICMP on the BSR:
■
■
■
About IRDP
The router software provides router discovery, by which the router can dynamically
learn about routes to other networks using the ICMP Router Discovery Protocol
(IRDP) for detecting routers. IRDP uses router advertisement and router solicitation
messages to discover addresses of routers on directly attached subnets.
With IRDP, each router periodically multicasts or broadcasts router advertisement
messages from each of its interfaces. Hosts discover the addresses of routers on the
directly attached subnet by listening for these messages. Hosts can use router
solicitation messages to request immediate advertisements, rather than wait for
unsolicited messages.
IRDP offers several advantages over other methods of discovering addresses of
neighboring routers. Primarily, it does not require hosts to recognize routing
protocols, nor does it require manual configuration by an administrator.
Router advertisement messages allow hosts to discover the existence of neighboring
routers, but not which router is best to reach a particular destination. If a host uses a
poor first-hop router to reach a particular destination, it receives a redirect message
identifying a better choice.
Summary of Contents for BSR 2000
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