Displaying The Routing Table - Lucent Technologies PortMaster 4 Configuration Manual

Displaying the Routing Table

4. The DHCP server responds with configuration information for the cable modem and
an IP address (172.16.98.67) for the coaxial cable interface on the cable modem.
5. Using the configuration information received from the DHCP server, the cable
modem dynamically assigns 172.16.98.67 to the cable interface, and configures the
cable modem so that upstream IP packets leave the cable modem via the telephone
interface with the IP address of the cable interface (172.16.98.67) as the source
address. Because packets now carry the source address of the cable interface,
response to these packets travels via the coaxial cable.
ComOS does not add routes to its table when forwarding or returning DHCP requests. It
transparently forwards and returns DHCP requests from dial-in clients to the specified
server.
To view DHCP relaying information, use the set console command followed by the set
debug 0x81 command. See the PortMaster Troubleshooting Guide for debugging
information.
To disable DHCP reply information, enter the following command:
Command> set dhcp server 0.0.0.0.
The PortMaster 4 does not forward packets to the address 255.255.255.255.

Displaying the Routing Table

Use the following command to display the IP routing table entries:
Command> show routes [String|Prefix/NM]
You can replace String with ospf or bgp to display only OSPF or BGP routes. Replacing
Prefix/NM with an IP address prefix and netmask displays only routes to that destination.
Enter the IP address prefix in dotted decimal format and the netmask as a number from
1 to 32, preceded by a slash—for example, /24. The netmask indicates the number of
high-order bits in the IP prefix.
To display the IPX routing table entries, enter the following command:
Command> show ipxroutes
Note – The PortMaster 4 supports the IPX protocol when running ComOS 4.1 or later.
IPX is not supported in ComOS 4.0.
The routes appear in the following order:
1. Default route
2. Host routes
3. Network routes
4. Expired routes that are no longer being advertised
2-16 PortMaster 4 Configuration Guide