Nokia 7750 SR BGP Next-Hop-Self (NHS) configuration

In our previous blog, we configured iBGP between Nokia SR Routers. PE01 received routes from CE via eBGP and advertised them to PE02.

Nokia Router (Alcatel-Lucent) BGP configuration Basic

Let's explore the output of PE02 for the prefix 10.10.10.5/32 advertised from CE01.


Prefix 10.10.10.5/32  is available in the BGP table of PE02


as per the below output, the route is not installed in the routing table of PE02. lets us explore the reason for not installing in its routing table of PE02.


    
From the above Output says that Invalid IGP for the next-hop advertised by the PE01 for the 
prefix 10.10.10.5.

By default when the route is advertised from ebgp it will change the next-hop to its own IP.
but in the case of iBGP, let's apply the policy to change the next-hop.

/configure router bgp group ibgp-internal next-hop-self 

After configuring the next-hop-self command on PE01, Now PE01 advertising its IP as net-hop for the 
prefix 10.1.5.5 and installing it in routing table. 
 
    

    


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