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Conference 7.286::fddi

Title:FDDI - The Next Generation
Moderator:NETCAD::STEFANI
Created:Thu Apr 27 1989
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2259
Total number of notes:8590

1247.0. "IP FRAG & DECbridge 620's" by CTOAVX::BEAULIEU () Thu Feb 24 1994 09:45

    
    Hi,
     
    My customer has some solaris servers that are sending out packets with
    the IP Frag bit set NOT to fragment. These packets hit the DECbridge
    620 and the DECbridge drops the packet (as it should) because it needs
    to fragment the packet in order to put it out on the Enet. My question
    is about what happens next. I believe the 620 should drop the packet and
    send back a message to the solaris server that it dropped the packet
    and increment the ICMP destination unreachable counter. The message back
    to he solaris server should be (ICMP type 3 code 4 set ) This message
    should tell the server to change it's IP Frag bit. 
    
    We are not seeing any of the latter, no change in ICMP counters at all
    and no message back to the server. Is this a problem or am I completely
    wrong about what is suppose to happen in this situation.
    
    Thanks, Mike Beaulieu
    
T.RTitleUserPersonal
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1247.1Refer to own note!COMICS::REYNOLDSMad Dogs and EnglishmenThu Feb 24 1994 10:039
    
    Mike,
    
    		have a look at note 1171 (which you posted!) - 
    the Decbridge 620 doesn't send back ICMPs since it isn't a full
    gateway implementation (although it would be nice)
    
    John.
    
1247.2I should have looked.....dah!!CTOAVX::BEAULIEUThu Feb 24 1994 11:083
    I should have looked, but I figured the last time I looked I only had
    one reply with no info.  thanks again, Mike Beaulieu
    
1247.3KONING::KONINGPaul Koning, B-16504Thu Feb 24 1994 12:364
Note that the new DECbridge 900 DOES send back the ICMP message, and in fact
includes the additional data specified in RFC 1191.

	paul