System information

BSR 64000 Configuration and Management Guide
5-20
Clearing Route Table Entries
To clear dynamic entries from the routing table, use the clear ip route command in
Privileged EXEC mode, as shown below. You must specify the IP address of the
routes and the mask of the IP address. Use the asterisk (*) to clear all dynamic routes.
MOT(config-if)#clear ip route {* | <A.B.C.D> | <A.B.C.D> <mask>}
where:
* is the asterisk character that clears all routes in the routing table.
A.B.C.D is the IP address of the route.
mask 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
• Enabling IRDP
• Enabling ICMP
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.