The MPLS WG Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] MIB Question
Title: MIB Question I've been rummaging through MTU related stuff and not that there is no-where that record MTU discards (either MPLS MIBs or Interfaces group MIB). Agree that for IP, it's a big yawn and probably means someone is doing MTU discovery and is a non-problem. Issues is PWs where there is no payload fragmentation and VPNs where the packet payload has no provider routable addresses in it (no ICMP reply possible). IMHO the "use a big MTU" stipulation won't hold up forever, and some token effort to prepare for the future may be in order. Seems to me that it would be useful to have a counter in the LSR MIB for non-IP MTU discards (maybe with a threshold trap although I'll let my betters comment further) so that at least some indication of a problem was possible as currently packets simply "black hole". I'd suggest that the non-IP category would also include stack depth > 1 (e.g. 2547) as ideally path MTU handling for a VPN should be a PE problem. comments?
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