From: CCIE KH49279 (ccie_lab@inetiq.com)
Date: Wed Jun 07 2006 - 17:41:42 ART
MP and Neighbor command do not have the same function. As well, do a
univercd search on neighbor command and how it can be used for cost
assignments in certain scenarios. I think you will walk away with a better
understanding of this general subject once you put a few minutes of contrast
and comparison of the subject to the test.
See the following list of different ospf network types and how they differ.
You will see essentially the neighbor command is used in an environment
where unicast hello packets are must be sent, and the neighbor command
accommodates specifying the interface of the neighbor which you will be
sending these unicast packets. I would also recommend labbing these varios
network types up at your earliest opportunity. You really need to understand
the nature of how these network types can be manipulated as well as the
variations of neighbor relationships that can be built.
I hope this leads you to some great learning.
Regards,
Wayne
point-to-point:
Hello: multicast 224.0.0.5
LSA: multicast 224.0.0.5
Hello Interval: 10
Dead Interval: 40
DR/BDR Election: none
point-to-multipoint:
Hello: multicast 224.0.0.5
LSA: unicast
Hello Interval: 30
Dead Interval: 120
DR/BDR Election: none
Broadcast:
Hello: multicast 224.0.0.5
LSA: multicast 224.0.0.5 and 224.0.0.6
Hello Interval: 10
Dead Interval: 40
DR/BDR Election: yes
nbma (non-broadcast):
Hello: unicast
LSA: unicast
Hello Interval: 30
Dead Interval: 120
DR/BDR Election: yes
Neighbor statement is required to form adjacencies.
virtual-link:
Hello: unicast
LSA: unicast
Hello Interval: 10
Dead Interval: 40
DR/BDR Election: no
No neighbor statement necessary.
This is implied within the command to create the virtual link.
Area x virtual-link a.b.c.d where a.b.c.d is the 32 bit ospf router-id,
expressed in dotted decimal notation.
Treated as an ospf demand circuit, and point-to-point characteristics.
Regards,
Wayne
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Sami
Sent: Wednesday, June 07, 2006 3:36 AM
To: Cisco certification
Subject: OSPF
Group,
As I understand OSPF point to multipoint and neighbour command both have
same function in Hub and spoke topolgy. If task doesn't specify what to use
, can we use any on one ?
Thanks
This archive was generated by hypermail 2.1.4 : Sat Jul 01 2006 - 07:57:32 ART