RE: GTTP and LSP PING

["Thomas D. Nadeau" <tnadeau@cisco.com>]

] -----Original Message-----
] From: owner-ccamp@ops.ietf.org 
] [mailto:owner-ccamp@ops.ietf.org] On Behalf Of Ronald Bonica
] Sent: Saturday, March 06, 2004 12:43 PM
] To: ccamp@ops.ietf.org
] Subject: GTTP and LSP PING
] 
] 
] Folks,
] 
] At IETF 59, an issue regarding the relationship of GTTP to 
] LSP PING was raised and redirected toward the list. I am 
] posting this message in order to initiate discussion.
] 
] One might argue that GTTP should invoke LSP PING when tracing 
] though an MPLS LSP. (In fact, previous versions of the GTTP 
] draft stated that GTTP would invoke LSP PING.) I'm not sure 
] that this is a good idea.

	Can you ellaborate why? 

] GTTP has a requirement to trace through multiple levels of 
] heterogenous tunnels. For example, GTTP might be required to 
] discover IP over MPLS over IP. If GTTP were to invoke LSP 
] PING to discover LSP details, I fear that it would miss the 
] IP tunnel at the bottom of the stack.

	That is an issue, as LSP ping/trace doesn't
work for IP as far as I understand. One idea is that it 
may be possible that LSP ping/trace could invoke IP trace/ping 
recursively.

	--Tom



] This assumption could be wrong. Comments?
] 
] ----------------
] Ronald P. Bonica
] ----------------
] Sometimes the easiest way to 
] start a dialog is to start talking.