Please help - this is quiet urgent
Hello I have a strange problem here. WE upgraded our AS400 system. The AS 400 is equipped with a fddi card and a fast ethernet card both on 2 different vlans. When I try to connect from my NT server to the AS400 the session keeps timing out. This problem occured only after the upgradation. out of 34 branches ( this is a banking environment) only 3 servers can connect. When i try to sniff at the nt server, the output shows that there is a SYN from the nt server and RST from AS400. IBM guys are here, but we dont seem to get across a solution. The NT server are running service pack 3. Is this related to any session time out ?? If anybody has come across a similar problem please share your ideas. CAnt seem to decide whether at all this is a network problem Thanks _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Please help - this is quiet urgent
what kind of upgrade was done on the AS400??. How does the AS400 connect to the network?? STUN, DLSW -Original Message- From: Gayathri [mailto:[EMAIL PROTECTED]] Sent: 27 March 2001 14:41 To: [EMAIL PROTECTED] Subject: Please help - this is quiet urgent Hello I have a strange problem here. WE upgraded our AS400 system. The AS 400 is equipped with a fddi card and a fast ethernet card both on 2 different vlans. When I try to connect from my NT server to the AS400 the session keeps timing out. This problem occured only after the upgradation. out of 34 branches ( this is a banking environment) only 3 servers can connect. When i try to sniff at the nt server, the output shows that there is a SYN from the nt server and RST from AS400. IBM guys are here, but we dont seem to get across a solution. The NT server are running service pack 3. Is this related to any session time out ?? If anybody has come across a similar problem please share your ideas. CAnt seem to decide whether at all this is a network problem Thanks _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Please help - this is quiet urgent
The connectivity is like this: AS400 (Fast Ether) -> CAT55 Switch --? Router The branches connect to the AS400 thru a NT Server , client access is used - sna connectivity "Andrew Larkins" <[EMAIL PROTECTED]> wrote in message 8F5F72F80EF5D311ADE600A0C9DCF8620112C11B@UBDCCOMJHBEX">news:8F5F72F80EF5D311ADE600A0C9DCF8620112C11B@UBDCCOMJHBEX... > what kind of upgrade was done on the AS400??. > How does the AS400 connect to the network?? STUN, DLSW > > -Original Message- > From: Gayathri [mailto:[EMAIL PROTECTED]] > Sent: 27 March 2001 14:41 > To: [EMAIL PROTECTED] > Subject: Please help - this is quiet urgent > > > Hello > > I have a strange problem here. WE upgraded our AS400 system. The AS 400 is > equipped with a fddi card and a fast ethernet card both on 2 different > vlans. > > When I try to connect from my NT server to the AS400 the session keeps > timing out. This problem occured only after the upgradation. > > out of 34 branches ( this is a banking environment) only 3 servers can > connect. > > When i try to sniff at the nt server, the output shows that there is a SYN > from the nt server and RST from AS400. > > IBM guys are here, but we dont seem to get across a solution. > > The NT server are running service pack 3. > > Is this related to any session time out ?? > > If anybody has come across a similar problem please share your ideas. CAnt > seem to decide whether at all this is a network problem > > > Thanks > > > > > > _ > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > _ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Please help - this is quiet urgent
Seems like your "upgradation" resulted in a "degradation"... [=`) Seriously, this does not appear to be a "network" problem. Especially since it does not seem that the "network" has been changed (I am assuming that the "upgradation" of the AS400 iincluded only software). The network appears to be functioning, in that the request from the NT server for a TCP session is reaching the AS400. The fact that it is being met with a RST is another matter altogether. In fact, that is where I would begin. What are the criteria required for the NT servers to successfully establish a session with the AS400? Do they include specific addresses (IP, or MAC), authentication issues, etc? An RST (reset) message from the AS400 is essentially equivalent to the AS400 hanging up the phone... What are the time deltas between the SYN and the RST? If you attempt to connect a number of times in a row, are the deltas consistent? Do pings display the same sorts of delta's? What are the characteristics of those servers that DO connect and how do they differ from those that cannot? I have asked a number of questions here - please DO NOT send me the answers. I simply want to point you toward some things to think about. Bottom line - there are a number of criteria for establishing a connection to the AS400, and those criteria are no longer being met. Determine what those criteria are and which ones are not met, then deterimine why not. This will lead you to the solution. Good luck! Z PS - I hope this isn't my bank... >From: Andrew Larkins <[EMAIL PROTECTED]> >Reply-To: Andrew Larkins <[EMAIL PROTECTED]> >To: Gayathri <[EMAIL PROTECTED]>, [EMAIL PROTECTED] >Subject: RE: Please help - this is quiet urgent >Date: Tue, 27 Mar 2001 15:12:57 +0200 > >what kind of upgrade was done on the AS400??. >How does the AS400 connect to the network?? STUN, DLSW > >-Original Message- >From: Gayathri [mailto:[EMAIL PROTECTED]] >Sent: 27 March 2001 14:41 >To: [EMAIL PROTECTED] >Subject: Please help - this is quiet urgent > >Hello > >I have a strange problem here. WE upgraded our AS400 system. The AS 400 is >equipped with a fddi card and a fast ethernet card both on 2 different >vlans. > >When I try to connect from my NT server to the AS400 the session keeps >timing out. This problem occured only after the upgradation. > >out of 34 branches ( this is a banking environment) only 3 servers can >connect. > >When i try to sniff at the nt server, the output shows that there is a SYN >from the nt server and RST from AS400. > >IBM guys are here, but we dont seem to get across a solution. > >The NT server are running service pack 3. > >Is this related to any session time out ?? > >If anybody has come across a similar problem please share your ideas. CAnt >seem to decide whether at all this is a network problem > > >Thanks > > > > > >_ >FAQ, list archives, and subscription info: >http://www.groupstudy.com/list/cisco.html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > >_ >FAQ, list archives, and subscription info: >http://www.groupstudy.com/list/cisco.html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ Get your FREE download of MSN Explorer at http://explorer.msn.com _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Please help - this is quiet urgent
This is a wild guess, but perhaps you have some assymetrical routing problems. By that I mean that after the upgrade the AS400 might be "routing" differently than it was before. If it has two connections to the network, maybe it is using the wrong one for return traffic to the NT server. From the NT server's point of view it would be seeing return traffic from the wrong IP address and would not be able to establish a tcp connection. That's just a guess, but it's something worth looking into. Regards, John >>> "Gayathri" <[EMAIL PROTECTED]> 3/27/01 5:40:30 AM >>> Hello I have a strange problem here. WE upgraded our AS400 system. The AS 400 is equipped with a fddi card and a fast ethernet card both on 2 different vlans. When I try to connect from my NT server to the AS400 the session keeps timing out. This problem occured only after the upgradation. out of 34 branches ( this is a banking environment) only 3 servers can connect. When i try to sniff at the nt server, the output shows that there is a SYN from the nt server and RST from AS400. IBM guys are here, but we dont seem to get across a solution. The NT server are running service pack 3. Is this related to any session time out ?? If anybody has come across a similar problem please share your ideas. CAnt seem to decide whether at all this is a network problem Thanks _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Please help - this is quiet urgent
So what you are saying is that you have an NT server for a router? -Original Message- From: gayathri [mailto:[EMAIL PROTECTED]] Sent: Tuesday, March 27, 2001 9:10 AM To: [EMAIL PROTECTED] Subject: Re: Please help - this is quiet urgent The connectivity is like this: AS400 (Fast Ether) -> CAT55 Switch --? Router The branches connect to the AS400 thru a NT Server , client access is used - sna connectivity "Andrew Larkins" <[EMAIL PROTECTED]> wrote in message 8F5F72F80EF5D311ADE600A0C9DCF8620112C11B@UBDCCOMJHBEX">news:8F5F72F80EF5D311ADE600A0C9DCF8620112C11B@UBDCCOMJHBEX... > what kind of upgrade was done on the AS400??. > How does the AS400 connect to the network?? STUN, DLSW > > -Original Message- > From: Gayathri [mailto:[EMAIL PROTECTED]] > Sent: 27 March 2001 14:41 > To: [EMAIL PROTECTED] > Subject: Please help - this is quiet urgent > > > Hello > > I have a strange problem here. WE upgraded our AS400 system. The AS 400 is > equipped with a fddi card and a fast ethernet card both on 2 different > vlans. > > When I try to connect from my NT server to the AS400 the session keeps > timing out. This problem occured only after the upgradation. > > out of 34 branches ( this is a banking environment) only 3 servers can > connect. > > When i try to sniff at the nt server, the output shows that there is a SYN > from the nt server and RST from AS400. > > IBM guys are here, but we dont seem to get across a solution. > > The NT server are running service pack 3. > > Is this related to any session time out ?? > > If anybody has come across a similar problem please share your ideas. CAnt > seem to decide whether at all this is a network problem > > > Thanks > > > > > > _ > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > _ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Please help - this is quiet urgent
Service Pack 3? There's all kinds of TCP/IP fixes since then. Get SP6a if company policy allows you to. Also if you're using it for a router, are you just using route add statements or are you using RAS or RRAS? RAS and RRAS also need SP5 (I think) or higher to be stable. Actually RRAS wouldn't work at all for me earlier service packs. I'm guessing at which one you need to make it stable but it's posted in the white papers on microsoft.com. If you can't upgrade the service pack, install SP3 again. Maybe something overwrote shared system files. Also check your bandwidth utilization on the server. If NT is used as a router you need a seriously fast machine (especially bus speed) to handle anything close to full capacity of the NIC. I like NT very much but I'm not afraid to admit that it stinks at TCP/IP transfer speed. With a crossover cable between 2 boxes with no other traffic I only got 6 to 12Mb throughput on 100Mb cards. But then again it had a 66Mhz bus so maybe that had something to do with it. Is the NT Server doing routing or is it also doing some kind of client services to connect users to shared resources on the AS400? Hope I can help you out here. Allen - Original Message - From: "Jim Dixon" <[EMAIL PROTECTED]> To: "gayathri" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Tuesday, March 27, 2001 12:52 PM Subject: RE: Please help - this is quiet urgent > So what you are saying is that > you have an NT server for a router? > > -Original Message- > From: gayathri [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, March 27, 2001 9:10 AM > To: [EMAIL PROTECTED] > Subject: Re: Please help - this is quiet urgent > > > The connectivity is like this: > > AS400 (Fast Ether) -> CAT55 Switch --? Router > > The branches connect to the AS400 thru a NT Server , client access is used - > sna connectivity > > > > > "Andrew Larkins" <[EMAIL PROTECTED]> wrote in message > 8F5F72F80EF5D311ADE600A0C9DCF8620112C11B@UBDCCOMJHBEX">news:8F5F72F80EF5D311ADE600A0C9DCF8620112C11B@UBDCCOMJHBEX... > > what kind of upgrade was done on the AS400??. > > How does the AS400 connect to the network?? STUN, DLSW > > > > -Original Message- > > From: Gayathri [mailto:[EMAIL PROTECTED]] > > Sent: 27 March 2001 14:41 > > To: [EMAIL PROTECTED] > > Subject: Please help - this is quiet urgent > > > > > > Hello > > > > I have a strange problem here. WE upgraded our AS400 system. The AS 400 is > > equipped with a fddi card and a fast ethernet card both on 2 different > > vlans. > > > > When I try to connect from my NT server to the AS400 the session keeps > > timing out. This problem occured only after the upgradation. > > > > out of 34 branches ( this is a banking environment) only 3 servers can > > connect. > > > > When i try to sniff at the nt server, the output shows that there is a SYN > > from the nt server and RST from AS400. > > > > IBM guys are here, but we dont seem to get across a solution. > > > > The NT server are running service pack 3. > > > > Is this related to any session time out ?? > > > > If anybody has come across a similar problem please share your ideas. CAnt > > seem to decide whether at all this is a network problem > > > > > > Thanks > > > > > > > > > > > > _ > > FAQ, list archives, and subscription info: > > http://www.groupstudy.com/list/cisco.html > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > > > _ > > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > > > > _ > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > _ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Please help - this is quiet urgent
Gayathri, How are you routing the traffic? Are you using DLSW or RSRB? Make sure you check your bitswap on the token interface also. Clayton Dukes - Download Free Essays, Term Papers and Cisco Training from http://www.gdd.net - Original Message - From: "John Neiberger" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Tuesday, March 27, 2001 10:16 AM Subject: Re: Please help - this is quiet urgent > This is a wild guess, but perhaps you have some assymetrical routing > problems. By that I mean that after the upgrade the AS400 might be > "routing" differently than it was before. If it has two connections to > the network, maybe it is using the wrong one for return traffic to the > NT server. From the NT server's point of view it would be seeing return > traffic from the wrong IP address and would not be able to establish a > tcp connection. > > That's just a guess, but it's something worth looking into. > > Regards, > John > > >>> "Gayathri" <[EMAIL PROTECTED]> 3/27/01 5:40:30 AM >>> > Hello > > I have a strange problem here. WE upgraded our AS400 system. The AS 400 > is > equipped with a fddi card and a fast ethernet card both on 2 different > vlans. > > When I try to connect from my NT server to the AS400 the session keeps > timing out. This problem occured only after the upgradation. > > out of 34 branches ( this is a banking environment) only 3 servers can > connect. > > When i try to sniff at the nt server, the output shows that there is a > SYN > from the nt server and RST from AS400. > > IBM guys are here, but we dont seem to get across a solution. > > The NT server are running service pack 3. > > Is this related to any session time out ?? > > If anybody has come across a similar problem please share your ideas. > CAnt > seem to decide whether at all this is a network problem > > > Thanks > > > > > > _ > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > > > > _ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Please help - this is quiet urgent
I believe you are using MS SNA at the branches end. Try the following to see whether would solved the problem. 1. Vary off the existing branches controller. 2. rename the controller 3. Let the AS400 Recreate the controlller and devices again. Hope it work. Gayathri wrote: > Hello > > I have a strange problem here. WE upgraded our AS400 system. The AS 400 is > equipped with a fddi card and a fast ethernet card both on 2 different > vlans. > > When I try to connect from my NT server to the AS400 the session keeps > timing out. This problem occured only after the upgradation. > > out of 34 branches ( this is a banking environment) only 3 servers can > connect. > > When i try to sniff at the nt server, the output shows that there is a SYN > from the nt server and RST from AS400. > > IBM guys are here, but we dont seem to get across a solution. > > The NT server are running service pack 3. > > Is this related to any session time out ?? > > If anybody has come across a similar problem please share your ideas. CAnt > seem to decide whether at all this is a network problem > > Thanks > > _ > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
