Whether the first area is 0 is not the point. RFC design AREA 0 is only for inter-area (please remember this) traffic. So why we need AREA 0 when we had only one area?
If u believe in Jeff Doylee, check his 'Routing TCP/IP volume 1' on Page 313. And I had copy one paragraph from this page as follow: "Figure 9.61 shows an OSPF internetwork. Note that each area has an assigned IP address from which its subnets are derived. Limiting an area to a single address or subnet is not necessary, but doing so has significant advantages, as will be seen in a later case study on address summarization. Note also that this example is designed to demonstrate the configuration of multiple areas. In "real life," it would be much wiser to put such a small internetwork within a single area. Further, that single area does not have to be area 0. The rule is that all areas must connect to the backbone; therefore, a backbone area is needed only if there is more than one area." See the last sentence? "a backbone area is needed only if there is more than one area." So just let us stop the quarreling on backbone:) I am 'paper' only because I had no time to practise:( On Fri, 12 Jul 2002 08:57:11 -0500 "Wilson, Christian" wrote: > You must use Area 0 if you are only using one area. All OSPF > implementations need an area 0. Even if you are using multiple areas, the > first area configured must be area 0. > > > -----Original Message----- > > From: thinkworker [SMTP:[EMAIL PROTECTED]] > > Sent: Friday, July 12, 2002 6:56 AM > > To: [EMAIL PROTECTED] > > Subject: 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=7&i=48703&t=48463 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
