[j-nsp] Core network design for an ISP

[Adam Vitkovsky]

> Saku Ytti [mailto:saku at ytti.fi]
> Sent: Friday, March 25, 2016 7:56 PM
>
> On 25 March 2016 at 21:39, Adam Vitkovsky
> <Adam.Vitkovsky at gamma.co.uk> wrote:
>
> >> I believe Luis refers to FIB localisation introduced in 12.3:
> >>
> http://www.juniper.net/documentation/en_US/junos15.1/topics/concept/f
> >> ib-localization-overview.html>
> >>
> > Hmm interesting concept -then with this feature enabled where would the
> VRF filter be executed on FIB-remote PFE or FIB-local PFE?
>
> I'm not big fan, due to the potential multiple NPUs involved in lookups and
> multiple fabric travels. I'm not intimately familiar with the feature though.
>
Not a fan of VRF based features or localization
As far as I know you'll get involved with lookups on multiple NPUs either way, though I'm not aware of any multiple fabric travels (apart from m-cast replication god forbid :) )

> > Sorry I wasn’t clear I meant how the box performs when under DDoS
> attack.
>
> Do you mean transit DDoS? With proper QoS, should be fine.
>
Yeah transit DDoS and how it flows through the chassis along VPN traffic, well "should be fine" but have anyone tested this actually please?


> > But yeah I guess I know what you mean with regards to lo0 filters I've been
> there, what I miss in Junos is the ability to say that only defined interfaces
> can be used to access the box. So one has to be very careful with the filter
> construction as well as understand the lo0 filter applicability rules posted
> here recently.
>
> You could use interface-groups, they are mutually exclusive with some
> forwarding filters though. I've previously used interface-groups to mark edge
> interfaces with 'privileged' access to control-plane, such like DHCP.
>
Not familiar with interface-groups but wouldn't want to restrict myself with such an elemental thing I guess.

adam



        Adam Vitkovsky
        IP Engineer

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