From: Howard C. Berkowitz (hcb@xxxxxxxxxxxx)
Date: Sat May 04 2002 - 11:03:22 GMT-3
At 9:21 AM -0400 5/4/02, Curtis Phillips wrote:
>Hello Group,
>
>Is it a correct assumption that IRDP is incapable of providing default-gateway
>and default gateway failover for networks where the end-systems are incapable
>of sending ICMP queries to the candidate default-gateways?
>
>Thanks,
>
>Curtis
There's a theoretical and a more or less practical answer to this.
If the end systems are passive but understand ICMP router
advertisements, then they could make use of IRDP by listening to
router advertisements.
It may be possible to overcome the first limitation, that of the
default timers of IDRP router announcements. You'd need to shorten
them significantly for a host to have a decent chance of learning
about alternate gateways in a reasonable period of time.
Such a passive host would also have to remember alternate default
gateways, since it can't depend on sending out a query in the event
of failure.
-- "What Problem are you trying to solve?" ***send Cisco questions to the list, so all can benefit -- not directly to me*** ******************************************************************************* * Howard C. Berkowitz hcb@gettcomm.com Chief Technology Officer, GettLab/Gett Communications http://www.gettlabs.com Technical Director, CertificationZone.com http://www.certificationzone.com "retired" Certified Cisco Systems Instructor (CID) #93005
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