C. Philip Wood (cpw%sneezy@LANL.GOV)
Tue, 23 Feb 88 16:12:20 MST
Naming names. No dispersions intended. But, hey, I want to know!
Does anyone on this list have an inkling about why given the following
configuration that 99.9% packets destined for an HP system are not passed
through a DEC MacLevel Bridge? (Thats right, one maybe every 300 to 400
segment #1 segment #2
8:0:20:1:33:1e Ha--| |--Hz 8:0:2b:3:92:23
8:0:20:1:47:d2 Hb--| |--Hz-1 8:0:20:1:d7:e5
|icmp icmp |--Hy 2:7:1:0:a6:59
8:0:9:0:65:3d Hp*--|echo-> echo->|--Hx aa:0:4:0:da:4 hummmm.
nada <-reply |
8:0:20:1:66:6a Hq--| |--Hr 8:0:2b:3:91:5c
SUBNET 1 of Class B network 128.165, mask==0xfffffc00
There is probably alot of irreverent/irrelevant, but, it was fun.
All the hosts Ha through Hz with the exception of Hp can communicate over
the ether. By communicate, I mean ICMP echo, vanilla, no ip options.
All the hosts Ha through Hq ***INCLUDING*** Hp* CAN communicate
over segment #1. When attempting an ICMP Echo between Hp and Hx, an
'etherfind' on segment #2 shows an echo and echo reply
reply packet. While an 'etherfind' on segment #1 shows an echo packet,
one out of 400 reply's make it. Do this with any other pair, like
Ha -- Hx, or Hp -- Ha, and it works bwainoh.
* Hp == HP-UX hp320 6.01 B 9000/320 Is there something strange about that
address? ... I don't think so.
(Little is known about this one of a kind on our net. It would be
nice if we could look at its "arp" tables, but they did it their
way, what if? ..., Rumor has it that the system is BSD3.4 made
to look like system V.)
Ha == Sun UNIX 4.2 Release 3.4
(This release is known to be worthless on a subnet, however, it
appears to work if it stands alone and does not use the yellow
Hr == VAX-11/785 running VMS/Wollengon (3.1) (They do ICMP mask request
replys correctly, its about time!, but don't send them too many
packets in a row!)
Hz == VAX-11/785 running BSD 4.3 (They forget to swap their subnetmask
and mess up anyone foolish enough to broadcast an ICMP mask request,
fixed by me, cause I got source!)
Hz-1 == Sun 3/260 running 3.5 (Hey, I can ifconfig netmasks and broadcast
addresses, but darn I still can't ip route between 128.165.4.xx
(mask == 0xfffffc00) and 18.104.22.168 (mask == 0xffffffe0), and
double darn the routed just chewed up all my cpu and flooded
the net with gosh knows what kind of "routing" packets, and those
yellow lights on the DEC LanBridge just don't blink anymore, their
Hx == VAX-8600 running Ultrix V2.0-1 (Talk about skizoid, this dude
talks DECNET and INTERNET of'n a one DEUNA and it's network
application suite has been loaded at j random times with:
gethostbyname from /etc/hosts
gethostbyname from /etc/yp
gethostbyname from /etc/resolv.conf (yup, ypserv -i)
So try, and answer a vanilla users question like "why can I rsh
and not rlogin!")
Hy == Celerity running Accel UNIX, (They were nice to rush us a patch
for their systems that fixed a bug that stomped on SUN clients
attempting to boot.
... == Bridge, Inc. terminal servers, Bridge, Inc. GS7's and GS3's, pure
DECNET VMS VAX systems, IBMPC's, KINETICS MacInTosh "gateway's",
miscelaneous DEC terminal servers, IBM RT's which respond to
ICMP echo requests and return the IP Record Route option, bless
P.S. I'm not afraid anymore. I think I'll save this one.
This archive was generated by hypermail 2.0b3 on Thu Mar 09 2000 - 14:40:43 GMT