nanog mailing list archives

Re: Cisco ASR9902 SNMP polling ... is interesting


From: Tom Beecher via NANOG <nanog () lists nanog org>
Date: Mon, 4 Aug 2025 10:01:42 -0400

Mel-

You have made multiple technical assertions in this thread that are
demonstrably false. Quoting your earlier messages :

   1. Also, non-management interfaces do packet processing in silicon at
   the ASIC level and don’t have the capacity to do anything more than
   statistical sampling of packets that require CPU-level processing to
   retrieve counters and generate SNMP responses. 62 % is as good a sampling
   rate as any other.
   2. Cisco is likely to say that the control plane is only fully supported
   on the management port.
   3. In-band SNMP to data forwarding interfaces violates that separation.


 You have attempted to frame these comments as :

honest and sincere attempts by other members to help identify the possible
problem.


While your attempts to help may have been honest and sincere attempts to
help the OP, they actually achieved the opposite effect. Your incorrect
technical assertions , if anything, only hindered the OP's attempt to
understand and identify their issue. Comment #1 is especially egregious ;
you're telling Drew that his observations are *normal*.

Saku made 2 comments that addressed these falsehoods :

It might be easier to contribute, if there is familiarity to the subject
matter.


some community member piled on with what can only

be described as a bizarre drivel.


The first was a polite way of calling out the technical inaccuracies. The
second was a more forceful way of stating "what you said was wrong". Most
people, when they are corrected on a factual point, tend to reply with "Oh
hey, I got that wrong, thanks for setting me straight" and move on. You
seem to have just ignored it.

There is a massive difference between the following statements :

   1. You are an idiot. [ Attacking the person ]
   2. What you said was idiotic. [ Attacking the statements ]

It seems to be that you may be struggling in identifying that difference,
and taking *any* criticism as a personal attack.

Nobody is bullying you, or anybody else, in this conversation.





On Mon, Aug 4, 2025 at 9:42 AM Mel Beckman via NANOG <nanog () lists nanog org>
wrote:

Thanks. I knew we were not so out to lunch! If you don’t push back on
bullies, they take over the community. It crops up on nanog periodically. :(

-mel via cell

On Aug 4, 2025, at 5:54 AM, Joe Loiacono via NANOG <
nanog () lists nanog org> wrote:

Hi Mel, for what it's worth, I could not figure out what they were
referring to by Saku's comments. I saw no justification for their
complaint. A bit out of character for Saku, also,

Joe

On 8/2/2025 7:23 PM, Mel Beckman via NANOG wrote:
I’ll just let the incivility of you both stand.

-mel

On Aug 2, 2025, at 3:52 PM, Tom Beecher <beecher () beecher cc> wrote:


Mel-

Saku did not call *you* any names. He called your *incorrect
statements* in this thread 'bizzard drivel'. Which he is absolutely correct
about. While your intentions may certainly have been to help, your
statements here have been frankly dead wrong and did not accomplish that.

Probably just want to take the L here.


On Sat, Aug 2, 2025 at 5:34 PM Mel Beckman via NANOG <
nanog () lists nanog org<mailto:nanog () lists nanog org>> wrote:
Saku,

What is actually appalling is that a member of NANOG calls “bizarre
drivel” the honest and sincere attempts by other members to help identify
the possible problem. There’s no cause to be uncivil, people can disagree
without stooping to name-calling.

 -mel

On Aug 2, 2025, at 11:46 AM, Saku Ytti via NANOG <
nanog () lists nanog org<mailto:nanog () lists nanog org>> wrote:

On Sat, 2 Aug 2025 at 21:02, Tom Beecher via NANOG
<nanog () lists nanog org<mailto:nanog () lists nanog org>> wrote:

I don't have in depth knowledge of Cisco's SNMP implementations, or
even
the ASR platform specifically, but if Cisco TAC is telling you this is
'normal', they are completely full of shit, and you should click any
and
every 'escalate' button you can find.

This almost sounds like a default control plane DDOS policer / LPTS ,
something like that.
There are various complicated reasons for this, LPTS policer is
unlikely culprit, but possible. Bug search will show various DDTS with
poor SNMP performance outcome, most of them are unrelated to LPTS.

But absolutely correct, the right solution is to escalate. In common
case this would be SE from your account team, who would fight for you
internally.


It is appalling that OP came to nanog after correctly suspecting TAC
is gaslighting them, some community member piled on with what can only
be described as a bizarre drivel.
--
 ++ytti
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