Comment below, At 04:18 AM 7/10/2002 +0000, 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=7&i=48493&t=48463 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
