RE: Multiple ABR for a particular Area? [7:60654]

2003-01-10 Thread Jean-Francois Delrieu
BTW, it works perfectly well with HSRP also: 2 routers connecting an area to
area 0.

JFD


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Re: Multiple ABR for a particular Area? [7:60654]

2003-01-09 Thread nrf
I certainly hope so.  If you're only allowed one ABR per area, then when
that ABR fails, that area is totally cut off.  It would mean that every ABR
in your network would be a single point of failure, and would basically mean
that nobody would ever use OSPF.


Peri Sophos  wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
 Yes you can have more than one ABR for one particular area :) If you
 want too.

 -Original Message-
 From: Helena [mailto:[EMAIL PROTECTED]]
 Sent: Thursday, January 09, 2003 1:21 AM
 To: [EMAIL PROTECTED]
 Subject: Multiple ABR for a particular Area? [7:60654]


 Hi,

 Are you allowed to have more than one ABR for a particular area?  For
 example, 2 routers that are both ABR for Area 2?

 Thanks
 Helena
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Multiple ABR for a particular Area? [7:60654]

2003-01-08 Thread Helena
Hi,

Are you allowed to have more than one ABR for a particular area?  For 
example, 2 routers that are both ABR for Area 2?

Thanks
Helena




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Re: Multiple ABR for a particular Area? [7:60654]

2003-01-08 Thread Howard C. Berkowitz
At 11:21 PM + 1/8/03, Helena wrote:
Hi,

Are you allowed to have more than one ABR for a particular area?  For
example, 2 routers that are both ABR for Area 2?

Yes. In fact, you could have (trust me that there's a link between 
the parts of  area 3 serviced by R1 and R4 --it would be too painful 
to draw this in ASCII

 R1R2 R3R4
  area 3 + area 1  area 1 + area 2area 2 + area 3   area 3 + area 1


Cisco's conservative rule is not more than 3 areas per ABR, although 
I've never found a reference that made it clear whether they are 
counting area 0.0.0.0 in that.  I've certainly had carefully chosen 
situations where I had an ABR servicing seven nonzero areas, with 
extensive summarization and very stable physical plants.




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RE: Multiple ABR for a particular Area? [7:60654]

2003-01-08 Thread Peri Sophos
Yes you can have more than one ABR for one particular area :) If you
want too.

-Original Message-
From: Helena [mailto:[EMAIL PROTECTED]]
Sent: Thursday, January 09, 2003 1:21 AM
To: [EMAIL PROTECTED]
Subject: Multiple ABR for a particular Area? [7:60654]


Hi,

Are you allowed to have more than one ABR for a particular area?  For 
example, 2 routers that are both ABR for Area 2?

Thanks
Helena
NOTICE - This message contains privileged and confidential information
intended only for the use of the addressee named above.
Any review, retransmission, dissemination, copying, disclosure or other use
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If you have received this message in error, please notify the sender by
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used for any purpose other than intended, nor should it be disclosed to any
other person. Any views expressed in this message are those of the
individual sender, except where the sender specifically states them to be
the view of Investec Group, its subsidiaries or associates.
The Investec Group is not liable for the security of information sent by
e-mail at your request, nor for the proper and complete transmission of the
information contained in the communication nor for any delay in its
receipt.  Please note that the recipient must scan this e-mail and any
attached files for viruses and the like.
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liability, damage or expense resulting directly or indirectly from the
access of any files which are attached to this message.




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