10-19-2010 08:19 AM - edited 03-04-2019 10:10 AM
Hi Friends, Just stuck with query in discussion. Please let me know if any one can sort me out.
I have two routers connected on serial link with /24 subnet mask, I have configured primary ip on WAN as 192.168.1.1/24 on R1 and .2 /24 on R2
While at the same time i do assign .3/24 as secondary ip on same interface on R1 and .4/24 on R2.
Now i advertise this subnet in OSPF, so now my query is OSPF will form neigbourship with primary IP or with secondary ip or with Both
R1 ===> R2
192.168.1.1/24 ==> 192.168.1.2 /24
192.168.1.3/24 ==> 192.168.1.4 /24
10-19-2010 09:13 AM
It will not form a relationship with the secondary address. It is not possible to configure it to do so.
http://www.cisco.com/en/US//tech/tk365/technologies_tech_note09186a0080094050.shtml
That said I am unsure of the reason you need two addresses in the same subnet on the same interface. Maybe you could explain the reason for doing this?
Regards
Dave Aicher
10-19-2010 09:21 AM
Hi,
In addition to david...you can announce secondary ip in ospf but adjancency will not form. In your case both primary/secondary is having
same subnet (strange, i have seed for the first time) so nothing different. But if you have different subnet you will be able to announce via ospf
regards
mahesh
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