[12930] in North American Network Operators' Group
Re: Packet over SONet/SDH (POS) experience?
daemon@ATHENA.MIT.EDU (William Allen Simpson)
Mon Oct 20 13:34:59 1997
Date: Mon, 20 Oct 97 16:47:43 GMT
From: "William Allen Simpson" <wsimpson@greendragon.com>
To: rja@corp.home.net (Ran Atkinson)
Cc: nanog@merit.edu
> From: rja@corp.home.net (Ran Atkinson)
> To: nanog@merit.edu, ietf-ppp@merit.edu
> Cc: wsimpson@greendragon.com, pppsdh@greendragon.com
> On Oct 19 8:12, William Allen Simpson wrote:
> % Has anyone (that has deployed) been having incident reports?
>
> There are known operational incidents where an adversary sent
> an IP packet designed to set the SONET scrambling algorithm ["f(x)"]
> to all zeros. This caused the SONET device to lose communications
> syncronisation and the circuit to go down, requiring a manual reset.
> Truly an ugly situation.
>
Please detail:
- what dates?
- which circuit paths?
- which vendor equipment?
- from whence we will derive, which vendor chipset?
> I've known about this issue ever since the PPP/SONET spec was
> published, but have withheld public comment until someone else
> mentioned the issue on a public list.
>
Too bad you were not involved in the discussion 3-5 years ago....
> PS: I'm not on the PPP or PPPSDH lists, so if folks on those lists
> want me to see any followups, those folks will need to Cc: me
> directly.
>
> PPS: The followups list definitely will need trimming. Please
> edit appropriately if you followup...
>
Ran, the original did not have those followups, and I'm kind of annoyed
that you added them.... I really did _not_ need 4 copies, and I expect
that the other NANOG folks will be less than enthused as well!
WSimpson@UMich.edu
Key fingerprint = 17 40 5E 67 15 6F 31 26 DD 0D B9 9B 6A 15 2C 32
