[c-nsp] BGP DFZ convergence time - FIB programming

[Mark Tinka]

On 11/Oct/18 15:56, James Bensley wrote:

> Hi Mark,
>
> What makes you think there would be a difference in time to load eBGP learned routes vs. iBGP learned routes? Something from personal experience?
>
> Am I being naive here, I'd expect them to be the same? An UPDATE from an eBGP or iBGP peer could contain the same NLRI with all of the same attributes so I would expect them to pass through the same pipe line of BGP parsing and processing code?

Depends on the capabilities of the other peer.

For us in iBGP, the CSR1000v is mega quick, we can load a full IPv4
table in less than a minute. I've not seen the same performance from
eBGP sessions, even when latency and bandwidth are not an issue.

Mark.