RE: Routing question (dead gateways)
- From: "Thomas W Shinder" <tshinder@xxxxxxxxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Thu, 30 Oct 2003 19:37:55 -0600
Hi Frederic,
How do you define "down"? I believe the gateway has to be unresponsive,
rather than the Internet connection being unavailable. But it's a good
question, I'm not sure regarding the details of how the dead GW is
detected. I'll have to check TechNet and find out.
Thanks!
Tom
www.isaserver.org/shinder
-----Original Message-----
From: Frederic Giroux [mailto:fgiroux@xxxxxxxxxxxxxx]
Sent: Tuesday, October 28, 2003 12:37 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] Routing question (dead gateways)
http://www.ISAserver.org
Good day!
I have a problem not per say related to ISA but, since it is
routing related, I feel this is a good place to ask.
On my LAN, I have two subnets separated by two routers. One is
ISA and it is also the GW to the Internet and the other is hardware and
is the primary router between the LANs
On the workstations, I have a default gateway pointing to ISA
and two GW for the other LAN (one being ISA and the other the hardware
router).
The routing table looks like this:
ISA: 192.168.23.254 Hardware router: 192.168.23.253
Network address Subnet Mask Gateway Interface
Metric
0.0.0.0 0.0.0.0 192.168.23.254 192.168.23.100
1
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1
1
192.168.23.0 255.255.255.0 192.168.23.100 192.168.23.100
1
192.168.23.100 255.255.255.255 127.0.0.1 127.0.0.1
1
192.168.23.255 255.255.255.255 192.168.23.100 192.168.23.100
1
192.168.24.0 255.255.255.0 192.168.23.253 192.168.23.100
1
192.168.24.0 255.255.255.0 192.168.23.254 192.168.23.100
2
224.0.0.0 224.0.0.0 192.168.23.100 192.168.23.100
1
255.255.255.255 255.255.255.255 192.168.23.100 192.168.23.100
1
Default gateway: 192.168.23.254
========================================================================
===
Persistent routes:
Network address Subnet Mask Gateway Metric
192.168.24.0 255.255.255.0 192.168.23.253 1
192.168.24.0 255.255.255.0 192.168.23.254 2
My problem is that the workstations do not detect if one of the
GW is down. The following parameters are properly set in the registry
under HKLM\system\CurrentControlSet\Services\TCPIP\parameters :
- EnableDeadGWDetect = 1
- DeadGWDetectDefault = 1
Thanks for any help :-)
Fred
______________________________
Frederic Giroux
LAN Administrator
CyberCap
fgiroux@xxxxxxxxxxxxxx
http://www.cybercap.qc.ca
33 Prince St.
Suite 301
Montreal, Qc
H3C 2M7
(514) 861-7700 ext. 303
Fax : (514) 861-7700
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