First thing I would recommend, was to compare your router setup at the branch office with the other two branch offices to make sure the config are the same (except for IP's, DLCI, etc.).
Then compare the branch office with the two others down to the last detail. As you might have read a month ago I had a problem where I had three branch offices with the exact same setup and equipment. However, at one of them, the switch died, so I replaced it with a hub, and then the fun began. It turned out that the autosense 10/100 and duplex worked okay with the switch but not the hub, so it placed the interface in a wrong configuration. BUT (which is the weirdest thing) I could communicate with the router from both the local and corporate network and visa versa. For some more weird reason the STP had placed the interface in blocking mode on my router that was setup as a bridge, so that was a really fun night. TAC gave up and ordered a replacement router, but I managed to find the problem a bit later and after I manually configured the LAN interface to 10 Half Duplex, the blocking went into forwarding, and everything was working again. There are many things that can cause problems you would not think of as your first choices, but keep looking at one piece at a time, but make sure to look at them all (including workstations, servers, hubs, switches, routers, cables, nic's, etc.). Hth, Ole ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Ole Drews Jensen Systems Network Manager CCNP, MCSE, MCP+I RWR Enterprises, Inc. [EMAIL PROTECTED] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ http://www.RouterChief.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ NEED A JOB ??? http://www.oledrews.com/job ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -----Original Message----- From: Ali, Abbas [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 31, 2002 3:54 PM To: [EMAIL PROTECTED] Subject: Weird Problem [7:33961] I have a network corporate side is connected to four branch offices with full T1 and branches are also connected to each other through Frame-Relay in a full mesh topology as a backup. Everything is working fine, all the branches have installed the preferred route through T1 link to reach the corporate network and other sites. Just to confuse you I have a DHCP server running at the corporate as well as one of the branch sides. All the branches have a IP helper address pointing to a DHCP server which is running on a branch office. In other words, traffic goes to the corporate first then from there go the branch office for dhcp lease ip address and logon to a windows 2000 domain. It is just a temporary solution. Eventually all branches will be pointing to the corporate office through wins or ip helper address for logon to a windows 2000 server. Here is the issue, one of the branches even though is going through a preferred route through T1, all the windows hosts will not even boot up and stuck in a black screen mode if Frame-Relay link is up which is S0. When I say up it means that is ready to take over incase of the primary link which is Point to Point fails. As soon as I shut down the S0 interface for Frame-Relay link, and then boot the hosts they boot fine and also logs on to the windows 2000 domain. I even made sure that the branch is installing the preferred route through T1 link and will only go through FR cloud if primary link goes down. I can't figure it out how Frame Relay interface can possibly conflict with this problem. Other branches are working fine with being Frame-Relay interfaces are up. Does anyone have a clue? All the help will be appreciated. Regards, Ali Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=33978&t=33961 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
