From: Ouellette, Tim (tim.ouellette@eds.com)
Date: Mon Jan 13 2003 - 22:47:33 GMT-3
Joe,
Think of the "dialer watch-list X" as being a group of routes that are being
watched in order to initiate a dial. Therefor, if you have 2 routes (like in
your example) and 1 of them goes down but the other stays up then the
condition is not met and dial is not initiated. If both networks go down,
then the condition is met (all routes "watched" are down) then dial is
initiated. The point of dialer-watch is to watch routes coming in on a
particular interface that get entereded into the routing table.
The only trick would be, Like you said, is if you did a "dialer watch-list
X" and specified two different routes. One of those routes being learned via
your specified interface and lets say the other was learned through a
different interface. My guess is that even if the route was learned from a
different interface but still in the routing table that this doesn't mean
the condition of "this route via this interface" (how I remember it) and
therefor if just one route when down, it would still dial. I would suggest
testing it, but it's how I remember it.
Tim
-----Original Message-----
From: Joe Chang [mailto:changjoe@earthlink.net]
Sent: Monday, January 13, 2003 12:24 PM
To: ccielab@groupstudy.com
Subject: Dialer watch question
Im reading a sample config for dialer watch:
http://www.cisco.com/warp/public/129/bri-backup-map-watch.html#dialerwatchop
e
ration
and it says:
"
a.. When a watched route is deleted, dialer watch checks for at least one
valid route for any of the IP addresses or networks being watched.
a.. If there is no valid route, the primary line is considered down and
unusable.
a.. Dialer watch then initiates the call, and the routers connect and
exchange routing information. All traffic for the remote network will now
use
the backup link.
b.. If there is a valid route for at least one of the watched IP networks
defined and the route is pointing to an interface other than the backup
interface configured for dialer watch, the primary link is considered up and
dialer watch does not initiate the backup link.
"
So does that mean if I configure:
dialer watch-list 1 ip 10.10.10.0 255.255.255.0
dialer watch-list 1 ip 20.20.20.0 255.255.255.0
int bri0
dialer watch-group 1
Then if route 10.10.10.0/24 goes down but 20.20.20.0/24 stays up, then
dialer
watch will NOT activate?
Thanks for your time,
Joe
.
.
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