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Ping across multihomed PC
Name: mjs1138 Date: July 5, 2006 at 06:32:49 Pacific OS: XP CPU/Ram: Pent IV Product: Dell
Comment:
Network: 3-XP machines all with static IP addresses; serially connected only to each other (Left(L)--Middle(M)--Right(R)). M has two Ethernet cards; L & R only one. Proper IPaddr/Subnetmasks isolate the two networks (LNet and RNet) from each other. Default Gate way for L & R is the network addresses of M's respective network interface. M has no default gateways. L can ping M; R can ping M; L can ping M's RNet interface address but not R, and visa-versa. My question is: since L can ping M's RNet interface why doesn't the IP-packet pass thru and get a response from R? Thanks for any help -- insight. --- Mike
Name: don2006 Date: July 5, 2006 at 07:22:49 Pacific
Reply:
Open a command prompt and look at the route command and the arp command. Probably the route command is the one that will work.
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Response Number 2
Name: wanderer Date: July 5, 2006 at 08:11:39 Pacific
Reply:
Did you ICS the two nics in M?
Give a person a fish, they eat for a day. Suggest they internet search and they learn a skill for a lifetime.
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Response Number 3
Name: mjs1138 Date: July 5, 2006 at 09:57:41 Pacific
Reply:
..."Did you ICS the two nics in M?"...
No, just simply installed 2 NICs on different nets. I guess what I find most curious, is that I can ping M's forign IP's but not pass through.
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Response Number 4
Name: Curt R Date: July 5, 2006 at 12:11:56 Pacific
Reply:
Likely that's due to your M PC building a default route between the two networks (adapters). This would allow you to ping the far side interface (internally in M), but not beyond (R or L respectively) it as they're different networks.
Open your command prompt window and use the route command (like don said) to check your routing table and see if you don't have routes between the two NIC's in the multihomed (M) PC.
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Response Number 5
Name: jefro Date: July 5, 2006 at 14:25:58 Pacific
Reply:
Did you bridge the two?
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Response Number 6
Name: mjs1138 Date: July 6, 2006 at 06:05:55 Pacific
Reply:
..."Did you bridge the two?"...
At first I did try to bridge the NICs. But that left me with a very confusing (at least for me) configuaration; one of the networks seemd to disapear for the ipconfig dispaly.
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Response Number 7
Name: jefro Date: July 6, 2006 at 17:10:35 Pacific
Reply:
Sorry I read that wrong.
A normal xp pc doesn't route any ethernet traffic across the two nic adapters.
See this for help. http://www.windowsnetworking.com/articles_tutorials/w2kprout.html
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Response Number 8
Name: mjs1138 Date: July 7, 2006 at 07:08:09 Pacific
Reply:
jefro, your right. If I modify the registry it will forward the packets. Thanks --- Mike
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Response Number 9
Name: jefro Date: July 7, 2006 at 18:25:35 Pacific
Reply:
I posted a you're welcome on some other fella's post.
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