[c-nsp] Internet in VRF

[Dan Peachey]

>
>
> Yeah the terms PIC edge and core are really confusing and I'll try to
> avoid those.
> But what I meant by PIC edge was essentially PE-CE link protection and by
> PIC core I meant PE-CE node protection.
> They both rely on BGP PIC.
> And by PIC I mean the FIB hierarchy (where indirect next hop is used
> between the prefix and the actual forwarding next hop (borrowing juniper
> terms here) )
>
>
> http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/configuration/xe-3s/irg-xe-3s-book/irg-bgp-mp-pic.html#GUID-8D2DAC32-EDDC-4657-B331-0163742D53CF
>
>
> http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/configuration/xe-3s/irg-xe-3s-book/irg-bgp-mp-pic.html#GUID-473F4D7C-0242-42E6-94CE-938A9D248F7A
> *should be: "Thus, with BGP PIC enabled on "PE1", Cisco Express Forwarding
> detects..."
>
>
The terms are confusing I agree. The first doc I ever read on it was:

https://www.nanog.org/meetings/nanog40/presentations/ClarenceFilsfils-BGP.pdf

...so I tend to stick to these terms/explanations, but the doc is quite old
and no doubt vendors now use the different terms interchangeably. There is
no mention of PE-CE link protection here but for me that's just another
failure scenario that PIC edge deals with (BGP withdraw as the trigger
rather than BGP next-hop change/IGP trigger).

Cheers,

Dan