Brett,
I believe HSRP is what you are looking for. In addition, you can have the
_primary_ router monitor the external (to the big I) interface and cut-over
to the _standby_ router if that (external) interface dies.
HSRP
http://www.cisco.com/warp/public/619/hsrpguidetoc.html
Here's a white-paper link:
http://www.cisco.com/warp/public/cc/so/cuso/epso/entdes/hsrp_wp.htm
Standby [group number] ip [ip-address(secondary)]
Standby [group number] timers hellotime holdtime
Standby [group number] priority priority number
Standby [group number] preempt
Standby [group number] track type number [interface priority]
Standby [group number] authentication string
Here's another link on some switch (prob) considerations w/ HSRP
http://www.cisco.com/warp/public/619/8.shtml
HTH,
TroyC
-----Original Message-----
From: Brett Johnson [mailto:[EMAIL PROTECTED]]
Sent: Monday, April 09, 2001 9:46 AM
To: [EMAIL PROTECTED]
Subject: backup default routes
I have a general question about the following scenario:
If I have two ways out to the internet using two different routers. These
two routers and
the firewall are connected to a switch. If I use a default route on the
firewall with one
path having a lower cost then the other, the firewall should forward the
packets down that path.
Now if the router in the preferred path crashes, will the other path become
active. In other words
how would the firewall know that the router is down. The firewalls link is
still active because
it is connected to another device (the switch), it isn't using a 'dynamic
routing protocol'. So
why would the firewall go to the other default route? (We could substitute
another routers instead
of a firewall in this scenario.)
Thank you.
Brett Johnson
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