Re: OSPF problem [7:48463]
Try area 0. I think it will work. thinkworker wrote: I think it is ur misconfiguration on the interfaces. In fact, OSPF will not need a 'backbond' is there is only one area. On Wed, 10 Jul 2002 04:18:45 GMT John Brandis wrote: I have the following error whilst playing with OSPF 12:52:40: %OSPF-4-ERRRCV: Received invalid packet: mismatch area ID, from backbone area must be virtual-link but not found from 10.1.4.20, Ethernet0 I have 2 routers, Router A and Router B, back to back. Able to get the 2 connected, however when I (Router A) router ospf 20 network 10.1.10.0 0.0.0.0 area 20 (RouterB) router ospf 20 network 192.168.1.0 0.0.0.0 area 20 Should I define different areas ? Thanks for your time John ** visit http://www.solution6.com visit http://www.eccountancy.com - everything for accountants. UK Customers - http://www.solution6.co.uk * This email message (and attachments) may contain information that is confidential to Solution 6. If you are not the intended recipient you cannot use, distribute or copy the message or attachments. In such a case, please notify the sender by return email immediately and erase all copies of the message and attachments. Opinions, conclusions and other information in this message and attachments that do not relate to the official business of Solution 6 are neither given nor endorsed by it. * Shahid Muhammad Shafi Every man dies; not every man really lives remember, if God bringz u 2 it, He WILL bring u thru it!!!- Please help feed hungry people worldwide http://www.hungersite.com/ A small thing each of us can do to help others less fortunate than ourselves - Do You Yahoo!? Yahoo! Autos - Get free new car price quotes Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=48752t=48463 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OSPF problem [7:48463]
I think it is ur misconfiguration on the interfaces. In fact, OSPF will not need a 'backbond' is there is only one area. On Wed, 10 Jul 2002 04:18:45 GMT John Brandis wrote: I have the following error whilst playing with OSPF 12:52:40: %OSPF-4-ERRRCV: Received invalid packet: mismatch area ID, from backbone area must be virtual-link but not found from 10.1.4.20, Ethernet0 I have 2 routers, Router A and Router B, back to back. Able to get the 2 connected, however when I (Router A) router ospf 20 network 10.1.10.0 0.0.0.0 area 20 (RouterB) router ospf 20 network 192.168.1.0 0.0.0.0 area 20 Should I define different areas ? Thanks for your time John ** visit http://www.solution6.com visit http://www.eccountancy.com - everything for accountants. UK Customers - http://www.solution6.co.uk * This email message (and attachments) may contain information that is confidential to Solution 6. If you are not the intended recipient you cannot use, distribute or copy the message or attachments. In such a case, please notify the sender by return email immediately and erase all copies of the message and attachments. Opinions, conclusions and other information in this message and attachments that do not relate to the official business of Solution 6 are neither given nor endorsed by it. * Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=48668t=48463 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OSPF problem [7:48463]
For a start it appears you do not have a common subnet on the link between the two devices so it'll complain about that. Make the Router A interface 10.1.1.1/255.255.255.252 and Router B 10.1.1.2/255.255.255.252 then add router ospf 1 network 10.1.1.0 0.0.0.3 area 0 Every OSPF network must have a backbone or area 0. The 'router ospf x' where x is simply a number you assign to identify that routers OSPF process ID, it can even be different on different routers! The shared areas though MUST match between routers. Really I should just say RTFM but I won't ;o) http://www.cisco.com/warp/public/104/1.html Darren Ward (PGradCS, CCIE #8245, SCSA, CCNP, CCDP, MCP) On Wed, 10 Jul 2002, John Brandis wrote: I have the following error whilst playing with OSPF 12:52:40: %OSPF-4-ERRRCV: Received invalid packet: mismatch area ID, from backbone area must be virtual-link but not found from 10.1.4.20, Ethernet0 I have 2 routers, Router A and Router B, back to back. Able to get the 2 connected, however when I (Router A) router ospf 20 network 10.1.10.0 0.0.0.0 area 20 (RouterB) router ospf 20 network 192.168.1.0 0.0.0.0 area 20 Should I define different areas ? Thanks for your time John ** visit http://www.solution6.com visit http://www.eccountancy.com - everything for accountants. UK Customers - http://www.solution6.co.uk * This email message (and attachments) may contain information that is confidential to Solution 6. If you are not the intended recipient you cannot use, distribute or copy the message or attachments. In such a case, please notify the sender by return email immediately and erase all copies of the message and attachments. Opinions, conclusions and other information in this message and attachments that do not relate to the official business of Solution 6 are neither given nor endorsed by it. * Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=48470t=48463 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: OSPF problem [7:48463]
A quick note below. At 04:36 AM 7/10/2002 +, Michael Williams wrote: Lemme take a stab at this one. I don't run OSPF where I work, but I'd like to keep my chops up to date =) In OSPF, you need to have an Area 0. If there are 2 routers only in your network, and only one area, it needs to be Area 0. If there is only 1 Area in your network, there is no need for it to be anything other than Area 0. Since every Area must touch Area 0, it seems to me there is something in the IOS that looks for at least one interface to be in Area 0 or at least in a virtual link to Area 0. A quick clarification here. In multi-area OSPF, you need to have a backbone area as all non backbone inter area traffic must traverse the backbone. However, in single area ospf, there is no need to designate the area as backbone by calling it area 0. Indeed, unless you are entirely sure that in the future this area will be the most optimally suited to being the backbone, I'd recommend you do not call it area 0. This usually gives you more flexibility later in life when you grow your OSPF domain. Change your areas on your routers to Area 0 and see if you have the same problem (OSPF gurus, please correct me as, again, I'm just taking a stab and would like to keep my OSPF up to date) (Now that I'm thinking about it, you could have a router that is totally within a certain Area that's not an ASBR or ABR, so not it's possible to there could be an interfaces not in Area 0... so at this point, my whole post is moot. too many rum and cokes =) OSPF gurus, please advise =) Thanks! Mike W. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=48492t=48463 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OSPF problem [7:48463]
Comment below, At 04:18 AM 7/10/2002 +, John Brandis wrote: I have the following error whilst playing with OSPF 12:52:40: %OSPF-4-ERRRCV: Received invalid packet: mismatch area ID, from backbone area must be virtual-link but not found from 10.1.4.20, Ethernet0 I have 2 routers, Router A and Router B, back to back. Able to get the 2 connected, however when I (Router A) router ospf 20 network 10.1.10.0 0.0.0.0 area 20 The network statement in the case of OSPF is simply a filter which is applied to the set of active interfaces which allows the router to select which interfaces will participate in OSPF and in which area they will reside. The mask portion is an inverse mask which a binary 1 is a wildcard and a 0 requires a match. In this case, you have the router looking for a 10.1.10.0/32 interface address which likely doesn't exist. Try specifying the interface addresses themselves, or change your mask to 0.0.0.255 assuming you want to match addresses inside the /24 boundary. When troubleshooting OSPF, it is useful to first ensure that you have the correct interfaces active in ospf using a show ip ospf int. From there, check your adjacencies using show ip ospf adj. Beyond that, check your OSPF database using show ip ospf data and look for type 1 LSA's (router) for every router in the area. Finally, check your routing table for the set of OSPF routes you are expecting. Pete (RouterB) router ospf 20 network 192.168.1.0 0.0.0.0 area 20 Should I define different areas ? Thanks for your time John ** visit http://www.solution6.com visit http://www.eccountancy.com - everything for accountants. UK Customers - http://www.solution6.co.uk * This email message (and attachments) may contain information that is confidential to Solution 6. If you are not the intended recipient you cannot use, distribute or copy the message or attachments. In such a case, please notify the sender by return email immediately and erase all copies of the message and attachments. Opinions, conclusions and other information in this message and attachments that do not relate to the official business of Solution 6 are neither given nor endorsed by it. * Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=48493t=48463 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: OSPF problem [7:48463]
At 5:50 AM + 7/10/02, Charles D Hammonds wrote: It is always best practice to use area 0 if it is the only area. If you have more than one area configured either one of them *must* be area 0 or there must be a virtual link to area 0. See the following for your particular error: http://www.cisco.com/warp/public/104/19.html#1 Google is your friend ;) It's the other way around. If you have one area, make it ANYTHING other than 0.0.0.0. Otherwise, if you need to add an area later, the existing area probably isn't optimized as a core, and you'll have to renumber it (and the new user area(s)) to nonzero in order to have a clean area 0.0.0.0. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=48523t=48463 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: OSPF problem [7:48463]
Lemme take a stab at this one. I don't run OSPF where I work, but I'd like to keep my chops up to date =) In OSPF, you need to have an Area 0. If there are 2 routers only in your network, and only one area, it needs to be Area 0. If there is only 1 Area in your network, there is no need for it to be anything other than Area 0. Since every Area must touch Area 0, it seems to me there is something in the IOS that looks for at least one interface to be in Area 0 or at least in a virtual link to Area 0. Change your areas on your routers to Area 0 and see if you have the same problem (OSPF gurus, please correct me as, again, I'm just taking a stab and would like to keep my OSPF up to date) (Now that I'm thinking about it, you could have a router that is totally within a certain Area that's not an ASBR or ABR, so not it's possible to there could be an interfaces not in Area 0... so at this point, my whole post is moot. too many rum and cokes =) OSPF gurus, please advise =) Thanks! Mike W. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=48465t=48463 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: OSPF problem [7:48463]
Its seeing the router as no direct link to the backbone (area 0) and such is assuming you have a virtual link configured. Change your areas to 0 and see what happens. Area 0, fundamental to OSPF. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=48468t=48463 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: OSPF problem [7:48463]
It is always best practice to use area 0 if it is the only area. If you have more than one area configured either one of them *must* be area 0 or there must be a virtual link to area 0. See the following for your particular error: http://www.cisco.com/warp/public/104/19.html#1 Google is your friend ;) Charles -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Michael Williams Sent: Tuesday, July 09, 2002 9:37 PM To: [EMAIL PROTECTED] Subject: RE: OSPF problem [7:48463] Lemme take a stab at this one. I don't run OSPF where I work, but I'd like to keep my chops up to date =) In OSPF, you need to have an Area 0. If there are 2 routers only in your network, and only one area, it needs to be Area 0. If there is only 1 Area in your network, there is no need for it to be anything other than Area 0. Since every Area must touch Area 0, it seems to me there is something in the IOS that looks for at least one interface to be in Area 0 or at least in a virtual link to Area 0. Change your areas on your routers to Area 0 and see if you have the same problem (OSPF gurus, please correct me as, again, I'm just taking a stab and would like to keep my OSPF up to date) (Now that I'm thinking about it, you could have a router that is totally within a certain Area that's not an ASBR or ABR, so not it's possible to there could be an interfaces not in Area 0... so at this point, my whole post is moot. too many rum and cokes =) OSPF gurus, please advise =) Thanks! Mike W. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=48471t=48463 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: OSPF problem [7:48463]
I *think* (she says, being too busy/lazy to look up the RFC) that if there is only a single area in an OSPF AS, it does not have to be area 0. As soon as you bung in a second area, though, you need to have one of them as area 0 or the two areas won't be able to talk to each other. What network is joining Router A and Router B? Going back to the original email... I have 2 routers, Router A and Router B, back to back. Able to get the 2 connected, however when I (Router A) router ospf 20 network 10.1.10.0 0.0.0.0 area 20 (RouterB) router ospf 20 network 192.168.1.0 0.0.0.0 area 20 Is the connection between A and B 10.1.10.0, or 192.168.1.0, or something different? Might be nice to include the connecting network in the OSPF process. Also, your network statements look a bit dodgy. If your networks are /24, try network 10.1.10.0 0.0.0.255 area 20 and likewise for Router B. Currently you are adding the interface with address 10.1.10.0/32 to the OSPF process, which is presumably not what the address of the interface actually is. I'm surprised it's giving you any errors, because I'm surprised it's doing anything. JMcL - Forwarded by Jenny Mcleod/NSO/CSDA on 10/07/2002 03:51 pm - Michael Williams Sent by: [EMAIL PROTECTED] 10/07/2002 02:36 pm Please respond to Michael Williams To: [EMAIL PROTECTED] cc: Subject:RE: OSPF problem [7:48463] Is this part of a business decision process?: Lemme take a stab at this one. I don't run OSPF where I work, but I'd like to keep my chops up to date =) In OSPF, you need to have an Area 0. If there are 2 routers only in your network, and only one area, it needs to be Area 0. If there is only 1 Area in your network, there is no need for it to be anything other than Area 0. Since every Area must touch Area 0, it seems to me there is something in the IOS that looks for at least one interface to be in Area 0 or at least in a virtual link to Area 0. Change your areas on your routers to Area 0 and see if you have the same problem (OSPF gurus, please correct me as, again, I'm just taking a stab and would like to keep my OSPF up to date) (Now that I'm thinking about it, you could have a router that is totally within a certain Area that's not an ASBR or ABR, so not it's possible to there could be an interfaces not in Area 0... so at this point, my whole post is moot. too many rum and cokes =) OSPF gurus, please advise =) Thanks! Mike W. Important: This e-mail is intended for the use of the addressee and may contain information that is confidential, commercially valuable or subject to legal or parliamentary privilege. If you are not the intended recipient you are notified that any review, re-transmission, disclosure, use or dissemination of this communication is strictly prohibited by several Commonwealth Acts of Parliament. If you have received this communication in error please notify the sender immediately and delete all copies of this transmission together with any attachments. Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=48473t=48463 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
