"default" route

[JI HUI]

Hi

It is seems that it is possible to have more than one "default" route items configured in the /etc/rc.config.d/netconf with different IP addresses as the next hop. The routes are shown in the output of "netstat -r" as well. (more than one "default" were shown")

Need advices:
1. Which route will be used? Only one will be used by OS ? or they are used in a certain manner?

2. Is it recommended solution for connectin balance?
(Assume no routing is enabled)

thank you.

[MANOJ SRIVASTAVA]

Hi

Use netstat -nr to display the current default route . In case the there are confusing enteries just delete them by giving

route delete abc*

then go ahead and add default route as:

route add default (abc.abc.abc.abc) 1

to make the change permanent edit the netconf file or use SAM.


Manoj

[Mark Fenton]

No matter how many "default" routes show up in your tables, only one is really ever used. Which of the several that appear in yours (which you didn't send, so can't strongly assert) will be used can be determined by tracing route to a couple of addresses external to your network and observing which gateway actually is used.

cheers

[Berlene Herren]

From 11.X on, it is possible to have more than one default route, and traffic will go out one or the other. The problem that may arise is that where it will go out is random; if you have two routes, going to two different routers, and they do not exchange RIP tables, then you have a 50-50 chance of the traffic making it out the first time. To overcome that, try looking at the ndd tunable ip_strong_es_model.

Regards,
Berlene