| This is the information the customer has sent me:-
The network map is (its crude....):
/--------\ 193.61.104.x
| Sun 10 |------------------|
\--------/ |
| |
| 193.61.107.x |
/----------------\ |
/--------\ / \ /--------\
| Sun 10 |---| FDDI Ring |--------| Router |
\--------/ \ / \--------/
(mercury) \----------------/ |
| |
| |
/--------\ 194.66.36.x |
|5000/260|------------------|
\--------/
(rowan)
The FDDI ring has the 5000/260 and 3 Sun 10's on it.
(All Sun 10's vield similar results)
I have compiled 'sprayd' from the BSD sources. All other machines
come with sprayd installed.
The arguments to spray are:
-c - packet count
-l - length of packet
When doing a spray from the Sun 10 to the 5000/260 over the FDDI
ring we get (typically):
----------------------------------------------------------------------
# spray -c 100 rowan-fddi
sending 100 packets of length 86 to rowan-fddi ...
74 packets (74.000%) dropped by rowan-fddi
1 packets/sec, 148 bytes/sec
# spray -c 100 rowan-fddi
sending 100 packets of length 86 to rowan-fddi ...
74 packets (74.000%) dropped by rowan-fddi
1 packets/sec, 148 bytes/sec
# spray -c 100 rowan-fddi
sending 100 packets of length 86 to rowan-fddi ...
74 packets (74.000%) dropped by rowan-fddi
1 packets/sec, 148 bytes/sec
----------------------------------------------------------------------
(These are three sprays taken simultaneously for comparison)
This happens with packets less than 370 bytes in length:
----------------------------------------------------------------------
# spray -c 100 -l 370 rowan-fddi
sending 100 packets of length 370 to rowan-fddi ...
72 packets (72.000%) dropped by rowan-fddi
1 packets/sec, 689 bytes/sec
# spray -c 100 -l 370 rowan-fddi
sending 100 packets of length 370 to rowan-fddi ...
73 packets (73.000%) dropped by rowan-fddi
1 packets/sec, 664 bytes/sec
# spray -c 100 -l 370 rowan-fddi
sending 100 packets of length 370 to rowan-fddi ...
69 packets (69.000%) dropped by rowan-fddi
2 packets/sec, 763 bytes/sec
----------------------------------------------------------------------
(which seems very odd)
Packets over 371 over the FDDI:
----------------------------------------------------------------------
# spray -c 100 -l 371 rowan-fddi
sending 100 packets of length 374 to rowan-fddi ...
74 packets (74.000%) dropped by rowan-fddi
739 packets/sec, 276611 bytes/sec
# spray -c 100 -l 371 rowan-fddi
sending 100 packets of length 374 to rowan-fddi ...
73 packets (73.000%) dropped by rowan-fddi
768 packets/sec, 287250 bytes/sec
# spray -c 100 -l 371 rowan-fddi
sending 100 packets of length 374 to rowan-fddi ...
75 packets (75.000%) dropped by rowan-fddi
709 packets/sec, 265489 bytes/sec
----------------------------------------------------------------------
Packets of 1K in length, over the FDDI:
----------------------------------------------------------------------
# spray -c 100 -l 1024 rowan-fddi
sending 100 packets of length 1026 to rowan-fddi ...
64 packets (64.000%) dropped by rowan-fddi
2 packets/sec, 2456 bytes/sec
# spray -c 100 -l 1024 rowan-fddi
sending 100 packets of length 1026 to rowan-fddi ...
62 packets (62.000%) dropped by rowan-fddi
2 packets/sec, 2588 bytes/sec
# spray -c 100 -l 1024 rowan-fddi
sending 100 packets of length 1026 to rowan-fddi ...
90 packets (90.000%) dropped by rowan-fddi
0 packets/sec, 681 bytes/sec
----------------------------------------------------------------------
Now if I do a spray from the Sun 10 over the router from the
104 to the 36 network over the 5000/260's ethernet card we get:
----------------------------------------------------------------------
# spray -c 100 194.66.36.2
sending 100 packets of length 86 to rowan-ether ...
no packets dropped by rowan-ether
2560 packets/sec, 220174 bytes/sec
# spray -c 100 rowan-ether
sending 100 packets of length 86 to rowan-ether ...
no packets dropped by rowan-ether
1828 packets/sec, 157267 bytes/sec
# spray -c 100 rowan-ether
sending 100 packets of length 86 to rowan-ether ...
no packets dropped by rowan-ether
2133 packets/sec, 183478 bytes/sec
----------------------------------------------------------------------
Packets of 1K over the ethernet
----------------------------------------------------------------------
# spray -c 100 -l 1024 194.66.36.2
sending 100 packets of length 1026 to 194.66.36.2 ...
55 packets (55.000%) dropped by 194.66.36.2
480 packets/sec, 492511 bytes/sec
# spray -c 100 -l 1024 194.66.36.2
sending 100 packets of length 1026 to 194.66.36.2 ...
61 packets (61.000%) dropped by 194.66.36.2
369 packets/sec, 379416 bytes/sec
# spray -c 100 -l 1024 194.66.36.2
sending 100 packets of length 1026 to 194.66.36.2 ...
no packets dropped by 194.66.36.2
1113 packets/sec, 1142055 bytes/sec
----------------------------------------------------------------------
If we do a spray from one Sun 10 to another over the fddi we get:
----------------------------------------------------------------------
# spray -c 100 mercury
sending 100 packets of length 86 to mercury ...
no packets dropped by mercury
3025 packets/sec, 260188 bytes/sec
# spray -c 100 mercury
sending 100 packets of length 86 to mercury ...
no packets dropped by mercury
3177 packets/sec, 273302 bytes/sec
# spray -c 100 mercury
sending 100 packets of length 86 to mercury ...
no packets dropped by mercury
3248 packets/sec, 279329 bytes/sec
----------------------------------------------------------------------
And 1K packets:
----------------------------------------------------------------------
# spray -c 100 -l 1024 mercury
sending 100 packets of length 1026 to mercury ...
37 packets (37.000%) dropped by mercury
1607 packets/sec, 1649686 bytes/sec
# spray -c 100 -l 1024 mercury
sending 100 packets of length 1026 to mercury ...
37 packets (37.000%) dropped by mercury
1607 packets/sec, 1649686 bytes/sec
# spray -c 100 -l 1024 mercury
sending 100 packets of length 1026 to mercury ...
44 packets (44.000%) dropped by mercury
1573 packets/sec, 1614522 bytes/sec
# spray -c 100 -l 1024 mercury
sending 100 packets of length 1026 to mercury ...
22 packets (22.000%) dropped by mercury
1747 packets/sec, 1792661 bytes/sec
----------------------------------------------------------------------
I know 'spray' really isnt a precise tool, but we are seeing
problems using telnet and ftp .....
--------------------------------------------------------------------------------
Can anyone help with this.
Regards,
Jon
|