ITEM: G7555L

TCPIP routes disappearing while using "routed"

Question:

Customer is running 3.2.5 with "routed" on his
machine.  Every so often routed appears to quit functioning,
and all of the dynamic routes in the route table disappear.

Response:

Dynamic routing (either routed or gated) will delete interface routes 
when it does not here any RIP traffic on the network. It takes about 10 
minutes for the timeout to occur.

This can be corrected with routed by placing an entry in the 
/etc/gateways file that looks like:

net net_part_ip_address gateway ip_address_of_interface metric 0 passive

Here is an example:

IP address: 10.20.30.1
netmask: 255.255.0.0   (subnetting is being done)

net 10.20 gateway 10.20.30.1 metric 0 passive

The "metric 0" means that the system is directly connected to the network.
If the IP address was not subnetted the entry in /etc/gateways would look
like:

net 10 gateway 10.20.30.1 metric 0 passive

To determine the network part of an address, do a logical AND of the IP 
address and the netmask. The ifconfig command when issued with just the 
interface name will display the netmask associated with the interface.

If gated is configured to run RIP, then the /etc/gated.conf file should 
be changed. Add the following line(s) to /etc/gated.conf:

interface name_of_interface passive;

where "name_of_interface" is en0, tr0, et0, or fi0



Support Line: TCPIP routes disappearing while using "routed" ITEM: G7555L

Dated: May 1994 Category: N/A

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