[j-nsp] multipath bgp in VRF

[david.roy at orange-ftgroup.com]

sorry this is the good example : 
 
Why entry 1 and entry 2 are not selected by the multipath algo ?
 
 
Router A < Router B 
Router R1 < Router R2
 
show route 0.0.0.0/0 exact 
 
* Entry 1 Update Source : Router A
    Protocol Next Hop = @IP1  Metric 70
    Router ID = Router A
    Originator ID = Router R1
 Entry 2 Update Source : Router B
    Protocol Next Hop = @IP1  Metric 70
    Router ID = Router B
    Originator ID = Router R1
    Inactive Reason : Update source
 Entry 3 Update Source : Router A
    Protocol Next Hop = @IP2  Metric 86
    Router ID = Router A
    Originator ID = Router R2
    Inactive Reason : Router ID
 Entry 4 Update Source : Router B
    Protocol Next Hop = @IP2  Metric 86
    Router ID = Router B
    Originator ID = Router R2
    Inactive Reason : Router ID
 


________________________________

	De : ROY David DOE/DERX 
	Envoyé : jeudi 3 juillet 2008 11:00
	À : juniper-nsp at puck.nether.net
	Objet : multipath bgp in VRF
	
	
	Dear all,
	 
	We have a VRF with the multipath statement configured (in routing-options) : 
	 
	By default the protocol-independent load balancing is applied to VPN routes that are equal until the router identifier with regard to route selection. 
	 
	Router identifier = Router ID field or Originator ID field if present. 
	 
	So I understand that equal routes are installed as a MULTIPATH entry in the forwarding table. 
	 
	In my example  : default route is received 4 times. I don't understand why there is no multipath route created and only one route is installed ? 
	 
	Router A < Router B 
	Router R1 < Router R2
	 
	show route 0.0.0.0/0 exact 
	 
	* Entry 1 Update Source : Router A
	    Protocol Next Hop = @IP1  Metric 70
	    Router ID = Router A
	    Originator ID = Router R1
	
	 Entry 2 Update Source : Router B
	    Protocol Next Hop = @IP1  Metric 70
	    Router ID = Router B
	    Originator ID = Router R1
	    Inactive Reason : Update source
	
	 Entry 3 Update Source : Router A
	    Protocol Next Hop = @IP2  Metric 70
	    Router ID = Router A
	    Originator ID = Router R2
	    Inactive Reason : Router ID
	
	 Entry 4 Update Source : Router B
	    Protocol Next Hop = @IP2  Metric 70
	    Router ID = Router B
	    Originator ID = Router R2
	    Inactive Reason : Router ID
	 
	 
	 
	 



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