Kirti, Thanks. I must have missed your last post to the list. Brandon On 8/2/05 3:21 PM, "Kirti S. Bajwa" <kbajwa@tibonline.net> wrote:
Brandon:
Yes it was fixed. Here is the posting:
------------ Hello List:
OK I admit, we fixed the problem & it was a stupid mistake on our technical personal part.
** I am posting this to close this problem **
So this was the problem. We used to use ARIEL 4200 as a modem bank. ARIEL is a card which is installed in a server. Few months ago, we switched to 3COM equipment and shut down the server with ARIEL cards in it.
Couple of weeks ago, we needed to test something and fired up the old server with ARIEL modem cards in it. You probably guessed it already. As soon as the old server was up, the ARIEL card assigned IP addresses to all the modems. There was the conflict. ARIEL was assigning the same IP address & 3COM TC was assigning the same IP's.
Kirti
-----Original Message----- From: Adam Barnhill [mailto:adam@semo.net] Sent: Friday, July 29, 2005 11:08 AM To: kbajwa@tibonline.net Subject: RE: FW: [USR-TC] RE: Dial-In Problem!!!!
-----Original Message----- From: usr-tc-bounces+kbajwa=tibonline.net@mailman.xmission.com [mailto:usr-tc-bounces+kbajwa=tibonline.net@mailman.xmission.com] On Behalf Of Brandon Lehmann Sent: Tuesday, August 02, 2005 3:11 PM To: Discussion relating to the 3Com/US Robotics Total Control modem systems. Subject: Re: [USR-TC] RE: Dial-In Problem!!!!
Kirti,
I was wondering if you resolved this issue as we have not heard from you for a few days.
Thanks,
Brandon
On 7/29/05 10:54 AM, "Brandon Lehmann" <blehmann@computerloft.net> wrote:
Kirti,
Per Charles directions: You can enable proxy-arp for the 3com on the dialin interfaces with the command:
enable ip proxy_arp_all_dialin
Make sure you save your config after you make theses changes (you may also need to restart the 3com). I'm not sure how much this will help as I looked at my TCs and I don't have this enabled on any of them. I have the same type of network setup as you do X.X.X.X/24 with a Cisco 2600 series router. As well as two /24s on a Cisco 3600 series at a remote location. RIP is currently disabled on my devices and everything works.
If the proxy-arp setting does not help please supply us with even more information. Can you paste the results of "sh ip" on the 3com to the list? (Feel free to censor the ARC IP address from the message)
Hope this helps,
Brandon Lehmann CCNA, A+, CFOT Great Lakes Internet Service, LLC. 218 Justice St. Fremont, Ohio 43420 blehmann@glis.cc
On 7/29/05 9:32 AM, "Kirti S. Bajwa" <kbajwa@tibonline.net> wrote:
Charles:
I have cleaned few lines to reduce the clutter.
------
ARC1(Port 15) 12.21.237.241 IP Pool: 12.21.237.48/C ARC2(Port 16) 12.21.237.242 IP Pool: 12.21.237.96/C
That's going to give you overlapping pools, which will cause big problems. If there was more info about your network (is it subnetted, are you doing this all off of one /24, etc.??) it would be much easier to troubleshoot.
ANSWER:
We have the entire IP block 12.21.237.0/24. I have mapped the IP addresses for servers, IP addresses, etc. I can change the mask, if it will help or change the size of the ip-pool for each pool to just 24. This does not seems to be the problem. ------ Unless you were using it before, turn RIP off, that's just adding more complication to an already hazy problem.
ANSWER:
I have not changed RIP. It was already ENABLED. I am told that it would not hurt to leave it ENABLED. AT&T ENABLED RIP on CISCO router and it did not resolve the problem. ------
"sh ip route" should do it, you don't need enable privs for that.
ANSWER:
No idea what you are asking me to do. I did use the above command & it displayed the ROUTING settings ------
If indeed you're using one /24 for everything and have a totally "flat" network, you're going to have to make sure the ARC is proxy-arping for your dialup users since they are getting assigned out of your main LAN block. We just dumped the last of our dialup gear, so I can't poke around, but here's two things someone can probably clarify for you:
-how to explicitly set a range of dynamic IPs. You MUST make sure you have nothing else on the LAN using those IPs. You MUST make sure that you are not using IPs from the same range on both ARCs. If you fail to do that, you will have a problem much like what you described.
-how to ensure that the arc will proxy-arp for the dialup connections.
Do those two things, then see how your problem goes. Again, do a traceroute from outside if you see it happen again AFTER making sure you've got the above two issues sorted out.
ANSWER:
- as I mentioned earlier, I have a map of IP addresses. I do not believe that IP addresses are being assigned to more than once. I will change the MASK on the IP pool for the ARC & see if the problem goes away.
- I will look into proxy-arp. Never done it but I will figure out unless somebody has a better suggestion.
------
Charles thanks again. These responses keep me going.
Kirti
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