North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re: IP over SONET considered harmful?

  • From: Naiming Shen
  • Date: Mon Mar 23 16:04:01 1998

 >Not decrementing the IP TTL at each LSR hop no more breaks the
 >IP TTL mechanisms than does frame-relay or ATM.

It should be the business of ISPs to hide or not to hide the lower
layer infrastructures. Unless someone really wants to use 'traceroute'
to see the DACs, ADMs, verilinks, DL3100s, etc.
A more flexible 'knob' would be cool, something like combining the 'cos'
bits in the labels with the decision to decremening or not. This will give
the management station the power to 'trace' even the regular trace packet
can't do.

 >- paul
 >ps. In fact, there may even be some ISP's that would prefer that
 >their internal L2 infrastructure remain invisible.
- Naiming Shen                                  MCI
- MCI Internet Engineering                      2100 Reston Parkway
- +1 703-715-7056 fax:703-715-7066 v272-7056    Reston, VA 20191