[c-nsp] ASR 1000 series replacement

Dragan Jovicic draganj84 at gmail.com
Sat Dec 16 11:14:29 EST 2023


That's great, because we had the same chassis in mind.
The peculiarity comes from the way CPEs are configured, routing, NAT
between vrfs, one tunnel limit per CPE, and some other things.

Anyway, awesome - thank you.


On Sat, Dec 16, 2023 at 10:35 AM Tarko Tikan via cisco-nsp <
cisco-nsp at puck.nether.net> wrote:

> hey,
> > We have a somewhat unusual scenario with thousands of CPE devices
> > each using cellular interface and gre tunnel to connect to hub
> > router, currently ASR 1001x. The hub router deploys NHRP map
> > multicast with GRE tunnels and bgp session to each cpe device, each
> > tunnel different customer vrf connected to mpls core network. There
> > are hundreds of GRE tunnels.
> Not really so unusual in SP environment.
> > What would be logical replacement for hub router considering
> > expansion and redundancy. We tried a pair of stacked Cisco 9500, and
> > it performed worse than expected.
> cat8500 family (non-L models). Forget the stupid naming, this is
> actually next-gen QFP and should be called asr1k+
> > One solution we have is another
> > router with same addressing scheme, and to rely on routing to migrate
> > tunnels to this new router in the event of failure of original hub.
> Anycast works and this is what we did for exactly the scenario your
> described earlier. But we found that we'd like it to be more hitless so
> we are now deploying dual tunnels from every CPE to C8500-12X headends.
> --
> tarko
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