I write ghost writer's labs.
;)
Scott Morris, CCIE4 #4713, JNCIE-M #153, JNCIS-ER, CISSP, et al.
CCSI/JNCI-M/JNCI-ER
Senior CCIE Instructor
smorris@xxxxxxxxxxxxxxxxxxxxxx
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Outside US: 775-826-4344
Knowledge is power.
Power corrupts.
Study hard and be Eeeeviiiil......
-----Original Message-----
From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On Behalf Of
Anthony Sequeira
Sent: Tuesday, January 13, 2009 7:45 PM
To: Narbik Kocharians
Cc: Darby Weaver; swm@xxxxxxxxxx; Tyson Scott; Pavel Bykov; Hobbs; mike
jones; ccielab@xxxxxxxxxxxxxx
Subject: Re: Frame-relay Fragmentation!
Petr Lapukhov writes my labs.
;-)
For what it is worth - I do not believe we use any ghost writers either.
Anthony J. Sequeira, CCIE #15626, CCSI #23251
Senior CCIE Instructor
asequeira@xxxxxxxxxxxxxxxxxxxxxx
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Outside US: 775-826-4344
On Jan 13, 2009, at 7:28 PM, Narbik Kocharians wrote:
I write my own labs.
On Tue, Jan 13, 2009 at 4:17 PM, Darby Weaver
<ccie.weaver@xxxxxxxxx> wrote:
Honestly though the only person who I've seen as a trainer who any
stats
and conclusions can be drawn from is that guy from Germany.
He literally has smiling faces with CCIE Digits tacked onto them.
If you count them and do the math for his 3-week classes he is
about the
closest person I can think of who has even close to perfect average.
Now the flip side:
1. Student who I did the mock labs with left his class and passed
the lab
with another week's usage of the instructor's racks per the deal.
2. One other student just emailed me and is going back to visit Mr.
H. for
the 3rd time - 3 weeks each and his company is paying for the
training so I
guess he can go till he passes. I don't think this is normal
though. But I
think my friend is a manager a client-company too.
It all depends on the student too.
Then again:
Some people I know reported back they did not think much of his
teaching
style and a 1-2 of them trained with Narbik and loved him by
comparison.
Note: the guy who passed above also trained with Narbik and had
good things
to say but I think he said he wished the classes were longer in
duration at
Narbik's as I recall. If I recall correctly he may have been to
one or more
othe trainers too.
The truth is a lot of candidates use more than one workbook or
trainer.
And there is the case where some of the vendors have even used the
same
people to write some of their materials - well how many people are
there who
want to write labs all day anyway? One side does not advertise who's
writing their labs since ghost writers don't get to get the credit
for their
work and the ghost writers want to work more and so solicit
themselves to
other vendors as well.
So things get a little murky.
Who's writing for who? Who's being true? And Who don't even write
anymore?
And then when one vendor suspects or knows for sure about a
promiscuous lab
workbook writer... Hmm.... Things happen too it seems.
And we live in such a small world for such stuff.
Funny how the ball rolls.
On 1/13/09, Scott Morris <swm@xxxxxxxxxx> wrote:
:)
-----Original Message-----
From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On
Behalf Of
Narbik Kocharians
Sent: Tuesday, January 13, 2009 4:45 PM
To: Darby Weaver
Cc: Tyson Scott; Pavel Bykov; Hobbs; mike jones; ccielab@xxxxxxxxxxxxxx
Subject: Re: Frame-relay Fragmentation!
hahahaha
I should have said 72.4 percent passing on thier first attempt. I
guess
its
like the 500 pages of QOS.
On Tue, Jan 13, 2009 at 6:20 AM, Darby Weaver
<ccie.weaver@xxxxxxxxx>
wrote:
Actually,
If you really wanna know how the "words" might look you got a few
options:
1. Check CCO for the Tech Tips where the issues affected someone
and how
Cisco had to deal with it -
http://www.cisco.com/en/US/tech/tk1077/technologies_tech_note09186a00801142d
e.shtml
2. The CCIE Accessor.
3. Cisco Press CCIE Lab Books and Practical Studies Books.
4. Cisco Press - Frame Relay
Maybe it's time to post the list of books you can use in lieu of
a class
for those on a tight budget or who don't have corporate funding.
Verify on both sides of the link:
R5#sh frame-relay fragment interface s1/0 501
fragment size 200 fragment type end-to-end
in fragmented pkts 4511 out fragmented pkts 86
in fragmented bytes 109183 out fragmented bytes 10797
in un-fragmented pkts 162 out un-fragmented pkts 88
in un-fragmented bytes 10808 out un-fragmented bytes 5952
in assembled pkts 1053 out pre-fragmented pkts 130
in assembled bytes 94707 out pre-fragmented bytes 16317
in dropped reassembling pkts 0 out dropped fragmenting pkts
0
in DE fragmented pkts 4511 out DE fragmented pkts 0
in DE un-fragmented pkts 162 out DE un-fragmented pkts 0
in timeouts 0
in out-of-sequence fragments 0
in fragments with unexpected B bit set 0
in fragments with skipped sequence number 0
out interleaved packets 0
R5#sh frame-relay fragment
interface dlci frag-type size in-frag out-frag dropped-frag
Se1/0 501 end-to-end 200 4519 86 0
On 1/12/09, Tyson Scott <tscott@xxxxxxxxxxxx> wrote:
Narbik,
It is definitely great to know what frame-relay fragmentation
does and
to
see how it affects traffic sent thru it. I think that your
example is
great
for that. But the question is to know when it is necessary. Most
tasks
are
not specifically going to tell a student to do fragmentation but
the
student
needs to understand based on the requirements of the question
that they
need
to do it.
But really that was a great example of configuring it Narbik.
Regards,
Tyson Scott - CCIE #13513 R&S and Security
Technical Instructor - IPexpert, Inc.
Telephone: +1.810.326.1444
Cell: +1.248.504.7309
Fax: +1.810.454.0130
Mailto: tscott@xxxxxxxxxxxx
Join our free online support and peer group communities:
http://www.IPexpert.com/communities<http://www.ipexpert.com/communities
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Lab Certifications.
From: Narbik Kocharians [mailto:narbikk@xxxxxxxxx]
Sent: Monday, January 12, 2009 3:34 PM
To: Pavel Bykov
Cc: Tyson Scott; Hobbs; mike jones; ccielab@xxxxxxxxxxxxxx
Subject: Re: Frame-relay Fragmentation!
You should NOT look for words, you should focus on knowing what
it does
and
where to use it and how and where it helps.
The topology is as follows:
R1---S0/0--10.1.12.1/24-----------------Frame-
relay--------------------10.1.
12.2/24--S0/0----R2
R1's Loopback is 1.1.1.1/8
R2's Loopback is 2.2.2.2/8
Task 1
Configure Frame-relay Fragmentation between the two routers such
that
the
largest packet size is 80 Bytes.
On Both Routers:
Rx(config)#interface S0/0
Rx(config-if)#Frame-relay fragment 80 end-to-end
To verify the configuration:
On R1
R1#Show frame-relay pvc 102
PVC Statistics for interface Serial1/0 (Frame Relay DTE)
DLCI = 102, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE =
Serial0/0
input pkts 0 output pkts 0 in bytes 0
out bytes 0 dropped pkts 0 in pkts
dropped 0
out pkts dropped 0 out bytes dropped 0
in FECN pkts 0 in BECN pkts 0 out FECN pkts 0
out BECN pkts 0 in DE pkts 0 out DE pkts 0
out bcast pkts 0 out bcast bytes 0
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
pvc create time 00:29:43, last time pvc status changed 00:28:34
fragment type end-to-end fragment size 80
Note the output of the above show command reveals that Frame-relay
fragmentation is enabled and the type is set to end-to-end which
is
FRF.12
To test the configuration:
On R1
R1#Ping 10.1.12.2 size 80 repeat 1
Type escape sequence to abort.
Sending 1, 80-byte ICMP Echos to 10.1.12.2, timeout is 2 seconds:
!
Success rate is 100 percent (1/1), round-trip min/avg/max =
64/64/64 ms
R1#Show frame-relay fragment 102
interface dlci frag-type size in-frag out-
frag
dropped-frag
Se0/0 102 end-to-end 80 2 2
0
Note the fragmentation size is set to 80 Bytes, and the size of
the
ping
packet was 80 Bytes as well, but the output of the above show
command
reveals that there were two fragmented packets. This is because
the
size
of
the frame-relay header was NOT considered when the size of the
ping
packet
was configured. The actual size of the frame-relay header is 2
Bytes,
and
as
a result of that, the size of the ping packet was 82 Bytes,
therefore,
2
fragmented packets were generated.
To test this further:
On R1
R1#clear counters
Clear "show interface" counters on all interfaces [confirm]
R1#
R1#Ping 10.1.12.2 size 78 repeat 1
Type escape sequence to abort.
Sending 1, 78-byte ICMP Echos to 10.1.12.2, timeout is 2 seconds:
!
Success rate is 100 percent (1/1), round-trip min/avg/max =
40/40/40 ms
R1#
R1#Show frame-relay fragment 102
interface dlci frag-type size in-frag out-
frag
dropped-frag
Se0/0 102 end-to-end 80 0 0
0
Note the above Show command reveals that the ICMP packet was NOT
fragmented;
the size of the ICMP packet is 78 Bytes plus the two Bytes of
Frame-relay
header equals to 80 Bytes, therefore, it does not need to get
fragmented.
To test the configuration further:
On R1
R1#Ping 10.1.12.2 size 79 repeat 1
Type escape sequence to abort.
Sending 1, 79-byte ICMP Echos to 10.1.12.2, timeout is 2 seconds:
!
Success rate is 100 percent (1/1), round-trip min/avg/max =
60/60/60 ms
R1#Show frame-relay fragment 102
interface dlci frag-type size in-frag out-
frag
dropped-frag
Se0/0 102 end-to-end 80 2 2
0
R1#
i hope this helped.
On Mon, Jan 12, 2009 at 11:21 AM, Pavel Bykov <slidersv@xxxxxxxxx>
wrote:
Also look for "Large data packets" and "voice packets are
prioritized
although are waiting behind large packets that take long to send
out"
Tyson, correction: Reducing delay, since there is no way to
prevent it
:)
On Mon, Jan 12, 2009 at 7:21 PM, Tyson Scott <tscott@xxxxxxxxxxxx>
wrote:
Mike,
Or if the question talks about preventing serialization delay.
Regards,
Tyson Scott - CCIE #13513 R&S and Security
Technical Instructor - IPexpert, Inc.
Telephone: +1.810.326.1444
Cell: +1.248.504.7309
Fax: +1.810.454.0130
Mailto: tscott@xxxxxxxxxxxx
-----Original Message-----
From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On
Behalf
Of
Hobbs
Sent: Monday, January 12, 2009 11:54 AM
To: mike jones
Cc: ccielab@xxxxxxxxxxxxxx
Subject: Re: Frame-relay Fragmentation!
Off the top of my head, maybe something like "maximum packet
size"...
On Mon, Jan 12, 2009 at 9:50 AM, mike jones <ccie1q2008@xxxxxxxxxxx
wrote:
Group,
What key words in a tasks will lead you to frame-relay
fragmentation
as
the solution?
Thanks!
Mike
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