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IP forwarding in a Distributed VOQ Architecture HLD#650

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kartik-arista:ipfwd3
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IP forwarding in a Distributed VOQ Architecture HLD#650
kartik-arista wants to merge 1 commit intosonic-net:masterfrom
kartik-arista:ipfwd3

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@kartik-arista
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This is an overlapping proposal with #639 for reference purposes.

It is likely that these proposals will be merged in some fashion after further discussion and review.

installs a host route 10.0.1.2/32 with interface Vlan4094 in the kernel. This is necessary for routes with the nexthop 10.0.1.2 to resolve correctly in BGP and get installed in the data plane.
installs a static ARP entry for 10.0.1.2/32 with the MAC address of Linecard3.0:Vlan4094 (the remote inband CPU port). This is required for the ability to ping remote neighbor R1 from FSI2.
3. R1 advertises a route for 40.0.0.0/24 to FSI1.
4. FSI1 redistributes 40.0.0.0/24 route to FSI2 with the nexthop as 10.0.1.2.
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Cant we redistribute ebgp routes to ibgp with BGP Next Hop Self?

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This document is deprecated in favor of

#639

I forgot to withdraw the PR. Doing it now.

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