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Cell Relay Retreat>MPLS WG Archive>month:2000-Dec> msg00367



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MPLS and fragmentation...

  • From: neil.2.harrison@bt.com
  • Date: Wed, 20 Dec 2000 00:19:09 -0000
  • Cc: mpls@UU.NET


On 14 Dec Ben wrote:
	Doing anything but silently discarding would require either a change
	to draft-ietf-mpls-label-encaps-08.txt or taking the slow path
through
the LSR.  
I think silent discard is the only viable option on at least 3 counts:
1	To ask ICMP to handle this would be a functional OAM layer
violation, ie failure is in MPLS layer, but request for failure notification
in IP layer.
2	Ultimate client layer may not be IP....so ICMP is not even an
option.
3	If failure is in the middle of transit MPLS domain carrying private
IP addresses inside LSPs (eg a VPN), then the operators IGP would not seem
able to route the ICMP indication.

neil