[c-nsp] Cisco Friends

[Shawn L]

We added this (below) to our ASR9901 which greatly sped up SCP-ing the
software image.

lpts pifib hardware police
flow ssh known rate 15000
flow ssh default rate 15000

I can't take credit for it -- found it online.



On Mon, Aug 4, 2025 at 9:40 AM Simon Leinen via cisco-nsp <
cisco-nsp at puck.nether.net> wrote:

> Gert Doering writes:
> > On Mon, Aug 04, 2025 at 02:09:18PM +0200, Simon Leinen via cisco-nsp
> wrote:
> >> [Mark Tinka writes:]
> >> > I'd be keen to hear what your experience running IOS XR on the NCS540
> >> > (especially if it's in a high-volume metro setting) has been.
> >>
> >> Works nicely, like on the bigger routers (NCS-55A1 / Cisco 8000) as far
> >> as I can tell.  We're using a relatively small feature set (IPv4+IPv6
> >> routing, OSPFv2/v3+BGP, limited MPLS for L2 VPNS) and small routing
> >> tables.  Our configurations tend to be rather static, and we mostly use
> >> old-style management protocols (SNMP/SSH/CLI).
>
> > Are IOS XR upgrades still such a pain today?  (We never moved to XR64,
> > and all I know is ASR9001, where the fastest way to do major upgrades
> > still is "turbo boot" with 2+ hours of downtime...)
>
> In XR7 there's "install replace" which is relatively simple and fast,
> though the .iso images it uses can be quite big (580MB to 2GB depending
> on platform).  So not as quick as IOS, but quite a bit better than your
> experience with earlier IOS-XR versions.
>
> > This is one of the nice bits about IOS, IOS XE, EOS, etc. - "upload one
> > image onto the box, reload, upgrade done" (and on EOS, the flash is
> > actually fast enough to make the "upload" really use available bandwidth
> > to the box...)
>
> XR7's install replace can install directly from ftp:// URLs.  From what
> my teammates say, copying/writing to flash still seems slow though.
>
> The NCS540 (using IOS-XR) actually reboot faster than the ASR920s (IOS-XE).
>
> Cheers,
> --
> Simon.
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