[c-nsp] OSPF on Secondary IP addresses.

[Ozgur Guler]

You can not establish neighbors over secondary addresses.

http://www.cisco.com/warp/public/104/2.html



As a workaround try configuring a tunnel for each secondary ip subnet and configure ospf on the tunnel interfaces.



--- On Wed, 11/6/08, Masood Ahmad Shah <masood at nexlinx.net.pk> wrote:
From: Masood Ahmad Shah <masood at nexlinx.net.pk>
Subject: [c-nsp] OSPF on Secondary IP addresses.
To: cisco-nsp at puck.nether.net
Date: Wednesday, 11 June, 2008, 2:24 PM

Can OSPF establish as neighbors on secondary addresses? Do not have any luck
unless the OSPF network interface is primary. Any ideas why and how do we go
around this? 

 

What if a ROUTERA is connected to a wireless bridge which is serving
multiple sites . Or there can be many other situation when you need to build
adjacency on secondary IP address instead of primary IP. 

 

Oops I can't find any parameter (when I configure secondary address on
Cisco
Router) like preferred/primary . thanks to juniper guys for providing it ;)
J 

 

 

Thanks in advance.

 

Regards,

Masood Ahmad Shah

 

-------------

ROUTERA

 

 interface FastEthernet1

 ip address 2.100.220.113 255.255.255.248

 ip address 2.100.220.97 255.255.255.248 secondary

 ip address 2.100.230.81 255.255.255.248 secondary

 no ip redirects

 no ip directed-broadcast

!

router ospf 100

 log-adjacency-changes

 area 3.3.3.102 stub no-summary

 network 2.100.230.80 0.0.0.7 area 3.3.3.102

 

--------------

ROUTERB

 

interface Ethernet0

 ip address 2.100.230.86 255.255.255.248

!

router ospf 100

 log-adjacency-changes

 area 3.3.3.102 stub

 passive-interface BRI0

 network 2.100.230.80 0.0.0.7 area 3.3.3.102

 

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