[j-nsp] Optimizing the FIB on MX

[Timur Maryin]

Hi Alexander,


On 18-Feb-16 10:30, Alexander Marhold wrote:

> Why do you need to enable MPLS and LDP for PIC ?????
>
> IMHO this is a documentation error , or do I miss something ?


Considering you refer to this doc:
http://www.juniper.net/techpubs/en_US/junos15.1/topics/task/configuration/bgp-configuring-bgp-pic-for-inet.html

I think there is a mistake.
Besides, the doc suggests to configure "protect core" within VRF which 
sounds wrong to me.


However i do not think this approach work in setup being discussed, 
since the doc also says:
===
  Junos OS installs the backup path for the indirect next hop on the 
Routing Engine and also provides this route to the Packet Forwarding 
Engine and IGP. When an IGP loses reachability to a prefix with one or 
more routes, it signals to the Routing Engine with a single message 
prior to updating the routing tables.
===

and i do not expect you run IGP with upstreams?



> Regarding you suggestion of using it in a routing instance with version
> <15.1 I am not sure if that works as documentation says that it only works
> for vpnv4-BGP routes
>
> DOCU says
> "Before you begin:
>
>      Configure LDP.
>      Configure an IGP, either OSPF or IS-IS.
>      Configure a Layer 3 VPN.
>      Configure multiprotocol BGP for either an IPv4 VPN or an IPv6 VPN.
> <---------------- nthis seems to be a restriction regarding your proposed
> solution
> "
>
> Any more info on that available ?


Well, the suggestion from Adam with version < 15.1 was to put internet 
into VRF if i recall correctly.
If such huge step is made why not run LDP+ BGP with inet-vpn internally? :)