strange problem

Unanswered Question
Apr 4th, 2007
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Think about this:

2 router on the same subnet. One Windows XP client. The default gateway of the client is Router 1. The Router 1's Default Gateway is Router 2. When I ping from Windows XP to Router 1, it pings 1 times to Router 1 and the other pings go to Router 2.

Windows Client adds a route to its routing table! What is the case, please give me a technical explanation and how to resolve this issue (this is a model actually, I will resolve a big problem if I realize whats going on in this scenario). thanks.

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Danilo Dy Wed, 04/04/2007 - 00:56
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Hi,


Can you post the following;

1. Windows Client

route print output

ipconfig all output

2. Routers

router1 and router2 ip address and subnet that is in the same vlan with your Windows Client

volkan.gunaydin Wed, 04/04/2007 - 06:39
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Etkin Yollar:

Ağ Hedefi Ağ Maskesi Ağ Ge?idi Arabirim ?l??t

0.0.0.0 0.0.0.0 192.168.2.220 192.168.2.230 20

69.147.114.210 255.255.255.255 192.168.2.253 192.168.2.230 1

127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1

192.168.0.1 255.255.255.255 192.168.2.253 192.168.2.230 1

192.168.0.241 255.255.255.255 192.168.2.253 192.168.2.230 1

192.168.2.0 255.255.255.0 192.168.2.230 192.168.2.230 20

192.168.2.230 255.255.255.255 127.0.0.1 127.0.0.1 20

192.168.2.255 255.255.255.255 192.168.2.230 192.168.2.230 20

193.254.252.30 255.255.255.255 192.168.2.253 192.168.2.230 1

207.46.111.27 255.255.255.255 192.168.2.253 192.168.2.230 1

207.68.178.61 255.255.255.255 192.168.2.253 192.168.2.230 1

224.0.0.0 240.0.0.0 192.168.2.230 192.168.2.230 20

255.255.255.255 255.255.255.255 192.168.2.230 192.168.2.230 1

255.255.255.255 255.255.255.255 192.168.2.230 10004 1

Varsayılan

Ağ Ge?idi: 192.168.2.220

===========================================================================

S?rekli Yollar:

Yok



IP1: 192.168.2.253

IP2:192.168.2.220


Thanks.

jitesh1982 Wed, 04/04/2007 - 00:57
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Hello Volkan,


Could you please post configuration of both router and ip of your XP client.


Rgds,

Jitesh

John Patrick Lopez Wed, 04/04/2007 - 01:34
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Isn't that because of ICMP Redirect or Proxy ARP? Check the subnet masks of the workstation and router.


Humm... That's strange. =)


-John

ncglass Wed, 04/04/2007 - 10:40
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Is router 1 sending an ICMP redirect to the host? The situation is appropriate for that to happen. Not sure if creating a static route is how Windows handles a redirect (rather than changing the default gateway)

sundar.palaniappan Wed, 04/04/2007 - 10:51
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What you are seeing is the normal behavior. IP redirects are enabled by default on Cisco routers.


If you are trying to get to a destination that router1 has to go through router2 then it would send ICMP redirect to the host to forward packet to that destination directly to router2, which is on the same segment.


There may be situations why this behavior may be undesirable. In that case, you can turn off this default behavior on router1 as noted below.


int --> this s/b your LAN interface

no ip redirect


HTH


Sundar

volkan.gunaydin Wed, 04/04/2007 - 11:01
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Thank you all of you and especially Sundar.

I will do this and let you know tomorrow, Sundar.



Volkan

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