Re: [OSL | CCIE_Voice] FRF12 frame-relay fragment 480

[Jason Aarons]

So the answer is;  "The router that receives the fragmented packets has to
reassemble those packets".  Since fragment is not set it doesn't reassemble.
I had this training more than a decade ago and had forgotten it.

 

I see the difference between a "good" wireshark and a bad is, as you
mentioned is a 530 byte SCCP message with multiple commands
(CallStateMessage Activate CallPlaneMessage SetRingerMessage StopToneMessage
OpenReceiveChannel StopToneMessage CallStatemesage) from the publisher is
not present. That packet has many SCCP message and would be first packet to
match a 480 fragement at HQ for a 384K link as you noted.) I don't see it
arrive at the phone, whereas with fragment on both ends it arrives fine.  So
if you don't set it on one side it doesn't get reassembled.

 

http://www.cathayschool.com/cisco-implementations-of-frame-relay-fragmentati
on-a383.html

FRF.12 Fragmentation supports the transport of both real-time and
non-real-time traffic across the same interface without causing excessive
delay to the real-time traffic. An example of real-time traffic that is
delay-sensitive is voice. FRF.12 is used to fragment the larger data frames
into a sequence of shorter frames so that they can be interleaved with the
real-time traffic for transmission. The fragmented data frames are
reassembled at the receiving end.

 

Seems JuneOS has more granulatiry;

http://netscreen.org/techpubs/en_US/junose12.3/information-products/topic-co
llections/command-reference-a-m/index.html?topic-15255.html

 

 

 

The 530 bytes packet that doesn't get reassembled screenshot; You press
Answer and never get connected.



 

 

From: William Bell [mailto:b...@ucguerrilla.com] 
Sent: Wednesday, February 27, 2013 5:01 PM
To: Jason Aarons
Cc: ccie_voice@onlinestudylist.com
Subject: Re: [OSL | CCIE_Voice] FRF12 frame-relay fragment 480

 

Jason,

 

This is mostly likely due to the fact that SCCP is getting fragmented on one
end and the other end isn't expecting that. When I break fragmentation in
this way, I also find phones won't re-register after a restart. Also, TFTP
would be broken in this scenario. 

 

Oh, it is worth noting that SCCP will try to pack as many "events" in a
packet as possible. Wireshark will help you see this happening. Place a call
to or from a phone and I suspect you will see what I mean. 

 

-Bill

 

 

--

William Bell

blog:   http://ucguerrilla.com

twitter: @ucguerrilla

 

 

 

On Feb 27, 2013, at 4:39 PM, Jason Aarons wrote:





Odd things happen if you have "one-direction" fragmentation.  Say for
example at Branch1 you leave off fragment.  If you call from headquarters to
Branch1 the phone will ring but you can't answer it.  But at Branch1 I can
call out.  Then later the phones at Branch1 lose their Line Text Labels.

 

Why does this 1 way fragmentation cause the bizzare Branch1 phone behavior?
What is actually happening to create the bizarre problems at Branch1?  Why
does fragmentation have to be both directions?

 

I'm going to Wireshark the back of Branch1 phone to dig into this deeper.  I
know both sides have to match, but why?

 

 

Example

Branch1#note the missing frame-relay fragment on purpose

map-class frame-relay AutoQoS-FR-Se0/1/0-202

frame-relay cir 364800

frame-relay bc 3640

frame-relay be 0

frame-relay mincir 364800

service-policy output AutoQoS-Policy-Trust

 

HQ#

map-class frame-relay AutoQoS-FR-Se0/1/0-101

frame-relay cir 364800

frame-relay bc 3640

frame-relay be 0

frame-relay mincir 364800

frame-relay fragment 480

service-policy output AutoQoS-Policy-Trust

 

___
For more information regarding industry leading CCIE Lab training, please
visit   www.ipexpert.com

Are you a CCNP or CCIE and looking for a job? Check out
 www.PlatinumPlacement.com

 

<>___
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Re: [OSL | CCIE_Voice] FRF12 frame-relay fragment 480

[William Bell]

Jason,

This is mostly likely due to the fact that SCCP is getting fragmented on one 
end and the other end isn't expecting that. When I break fragmentation in this 
way, I also find phones won't re-register after a restart. Also, TFTP would be 
broken in this scenario. 

Oh, it is worth noting that SCCP will try to pack as many "events" in a packet 
as possible. Wireshark will help you see this happening. Place a call to or 
from a phone and I suspect you will see what I mean. 

-Bill


--
William Bell
blog: http://ucguerrilla.com
twitter: @ucguerrilla



On Feb 27, 2013, at 4:39 PM, Jason Aarons wrote:

> Odd things happen if you have “one-direction” fragmentation.  Say for example 
> at Branch1 you leave off fragment.  If you call from headquarters to Branch1 
> the phone will ring but you can’t answer it.  But at Branch1 I can call out.  
> Then later the phones at Branch1 lose their Line Text Labels.
>  
> Why does this 1 way fragmentation cause the bizzard Branch1 phone behavior? 
> What is actually happening to create the bizarre problems at Branch1?  Why 
> does fragmentation have to be both directions?
>  
> I’m going to Wireshark the back of Branch1 phone to dig into this deeper.  I 
> know both sides have to match, but why?
>  
>  
> Example
> Branch1#note the missing frame-relay fragment on purpose
> map-class frame-relay AutoQoS-FR-Se0/1/0-202
> frame-relay cir 364800
> frame-relay bc 3640
> frame-relay be 0
> frame-relay mincir 364800
> service-policy output AutoQoS-Policy-Trust
>  
> HQ#
> map-class frame-relay AutoQoS-FR-Se0/1/0-101
> frame-relay cir 364800
> frame-relay bc 3640
> frame-relay be 0
> frame-relay mincir 364800
> frame-relay fragment 480
> service-policy output AutoQoS-Policy-Trust
>  
> ___
> For more information regarding industry leading CCIE Lab training, please 
> visit www.ipexpert.com
> 
> Are you a CCNP or CCIE and looking for a job? Check out 
> www.PlatinumPlacement.com

___
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Re: [OSL | CCIE_Voice] CSS at gateway level

[William Bell]

I am with Bill on this one. I actually pre-built gateway calling search spaces 
in my standard config template. I apply them to all gateways. I may have no 
partitions in the CSS but I still apply it. When I got through the lab in 
detail and I hit a question where I need a special pattern on ingress (just for 
the gateway at a site) then I stick that pattern (and new partition) into the 
config and move on. The benefit is that I don't have to go back into the 
gateway and reset anything. 


--
William Bell
blog: http://ucguerrilla.com
twitter: @ucguerrilla



On Feb 27, 2013, at 2:31 PM, Bill wrote:

> Does it help you, and by this I mean you specifically, reach your goal of 
> making your dial plan work just the way you want.
> 
> I know lots of people don't use css at the gw but I felt more comfortable 
> using them.  Could I pass without it, yeah as long as everything works like 
> it is supposed to but for me it just flows better when I use them and that is 
> how I passed.
> 
> Sent from my iPad
> 
> On Feb 27, 2013, at 11:40 AM, Steve Keller  wrote:
> 
>> probably not necessary in this lab but it certainly would not hurt to 
>> configure a CSS-gateways and stick it everywhere in case later in the lab 
>> you needed one for some reason. The reason i most often see this done in the 
>> field is if you are getting DID's from the carrier that do not map into the 
>> extensions on the phones cleanly and you need a translation pattern to 
>> modify the DNIS to match your extensions. Just a guess, but for this lab I 
>> dont think you would have DIDs like 61455512XX but your extensions are like 
>> 655XX, maybe there is internal numbering scheme you are trying to adhere to 
>> thoughout your enterprise and your DIDs will not always match.
>> 
>> On Wed, Feb 27, 2013 at 11:49 AM, Ben John  wrote:
>> Hello everyone,
>> Question: it is a good practice not to configure CSS at gateway level during 
>> the real lab ? i am doing some IPExpert labs i don't see them configuring 
>> any ? My internal DNs are in none Partition. Please advise ?
>> 
>> Ben
>> 
>> 
>> ___
>> For more information regarding industry leading CCIE Lab training, please 
>> visit www.ipexpert.com
>> 
>> Are you a CCNP or CCIE and looking for a job? Check out 
>> www.PlatinumPlacement.com
>> 
>> ___
>> For more information regarding industry leading CCIE Lab training, please 
>> visit www.ipexpert.com
>> 
>> Are you a CCNP or CCIE and looking for a job? Check out 
>> www.PlatinumPlacement.com
> ___
> For more information regarding industry leading CCIE Lab training, please 
> visit www.ipexpert.com
> 
> Are you a CCNP or CCIE and looking for a job? Check out 
> www.PlatinumPlacement.com

___
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www.ipexpert.com

Are you a CCNP or CCIE and looking for a job? Check out 
www.PlatinumPlacement.com

[OSL | CCIE_Voice] FRF12 frame-relay fragment 480

[Jason Aarons]

Odd things happen if you have "one-direction" fragmentation.  Say for
example at Branch1 you leave off fragment.  If you call from headquarters to
Branch1 the phone will ring but you can't answer it.  But at Branch1 I can
call out.  Then later the phones at Branch1 lose their Line Text Labels.

 

Why does this 1 way fragmentation cause the bizzard Branch1 phone behavior?
What is actually happening to create the bizarre problems at Branch1?  Why
does fragmentation have to be both directions?

 

I'm going to Wireshark the back of Branch1 phone to dig into this deeper.  I
know both sides have to match, but why?

 

 

Example

Branch1#note the missing frame-relay fragment on purpose

map-class frame-relay AutoQoS-FR-Se0/1/0-202

frame-relay cir 364800

frame-relay bc 3640

frame-relay be 0

frame-relay mincir 364800

service-policy output AutoQoS-Policy-Trust

 

HQ#

map-class frame-relay AutoQoS-FR-Se0/1/0-101

frame-relay cir 364800

frame-relay bc 3640

frame-relay be 0

frame-relay mincir 364800

frame-relay fragment 480

service-policy output AutoQoS-Policy-Trust

 

___
For more information regarding industry leading CCIE Lab training, please visit 
www.ipexpert.com

Are you a CCNP or CCIE and looking for a job? Check out 
www.PlatinumPlacement.com

Re: [OSL | CCIE_Voice] CSS at gateway level

[Bill]

Does it help you, and by this I mean you specifically, reach your goal of 
making your dial plan work just the way you want.

I know lots of people don't use css at the gw but I felt more comfortable using 
them.  Could I pass without it, yeah as long as everything works like it is 
supposed to but for me it just flows better when I use them and that is how I 
passed.

Sent from my iPad

On Feb 27, 2013, at 11:40 AM, Steve Keller  wrote:

> probably not necessary in this lab but it certainly would not hurt to 
> configure a CSS-gateways and stick it everywhere in case later in the lab you 
> needed one for some reason. The reason i most often see this done in the 
> field is if you are getting DID's from the carrier that do not map into the 
> extensions on the phones cleanly and you need a translation pattern to modify 
> the DNIS to match your extensions. Just a guess, but for this lab I dont 
> think you would have DIDs like 61455512XX but your extensions are like 655XX, 
> maybe there is internal numbering scheme you are trying to adhere to 
> thoughout your enterprise and your DIDs will not always match.
> 
> On Wed, Feb 27, 2013 at 11:49 AM, Ben John  wrote:
>> Hello everyone,
>> Question: it is a good practice not to configure CSS at gateway level during 
>> the real lab ? i am doing some IPExpert labs i don't see them configuring 
>> any ? My internal DNs are in none Partition. Please advise ?
>> 
>> Ben
>> 
>> 
>> ___
>> For more information regarding industry leading CCIE Lab training, please 
>> visit www.ipexpert.com
>> 
>> Are you a CCNP or CCIE and looking for a job? Check out 
>> www.PlatinumPlacement.com
> 
> ___
> For more information regarding industry leading CCIE Lab training, please 
> visit www.ipexpert.com
> 
> Are you a CCNP or CCIE and looking for a job? Check out 
> www.PlatinumPlacement.com
___
For more information regarding industry leading CCIE Lab training, please visit 
www.ipexpert.com

Are you a CCNP or CCIE and looking for a job? Check out 
www.PlatinumPlacement.com

Re: [OSL | CCIE_Voice] CSS at gateway level

[Steve Keller]

probably not necessary in this lab but it certainly would not hurt to
configure a CSS-gateways and stick it everywhere in case later in the lab
you needed one for some reason. The reason i most often see this done in
the field is if you are getting DID's from the carrier that do not map into
the extensions on the phones cleanly and you need a translation pattern to
modify the DNIS to match your extensions. Just a guess, but for this lab I
dont think you would have DIDs like 61455512XX but your extensions are like
655XX, maybe there is internal numbering scheme you are trying to adhere to
thoughout your enterprise and your DIDs will not always match.

On Wed, Feb 27, 2013 at 11:49 AM, Ben John  wrote:

>  Hello everyone,
> Question: it is a good practice not to configure CSS at gateway level
> during the real lab ? i am doing some IPExpert labs i don't see them
> configuring any ? My internal DNs are in none Partition. Please advise ?
>
> Ben
>
>
> ___
> For more information regarding industry leading CCIE Lab training, please
> visit www.ipexpert.com
>
> Are you a CCNP or CCIE and looking for a job? Check out
> www.PlatinumPlacement.com
>
___
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www.ipexpert.com

Are you a CCNP or CCIE and looking for a job? Check out 
www.PlatinumPlacement.com

[OSL | CCIE_Voice] CSS at gateway level

[Ben John]

Hello everyone,
Question: it is a good practice not to configure CSS at gateway level during 
the real lab ? i am doing some IPExpert labs i don't see them configuring any ? 
My internal DNs are in none Partition. Please advise ?

Ben

  ___
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www.ipexpert.com

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Re: [OSL | CCIE_Voice] B Channel Busy Out

[Jason Lee]

I use this as a strategy for checking my gateway configuration

Ensure that your are meeting requirements on the following


   1. display-ie
   2. BCHAN order selection (Ascending, Descending)
   3. BCHAN number
  1. How many BCHANs?
 1. If not specified create a full PRI.
 2. If fractional
1. Set BCHAN Maintenance in Advanced Service Parameters
2. Check the *Check Status *checkbox in GW config
 4. Clocking
  1. Network clock participate
  2. network clock select 1 t10/0/0
   5. ISDN Switch-Type
   6. Source-Address
   7. 911
  1. Done in gateway section.
 1. Make sure to have routed correctly, SLRG?,
  8. Direct Inward Dial
   9. clear counters



On Wed, Feb 27, 2013 at 3:38 AM, Jamie Parr (jamparr) wrote:

>  I am also curious as to the grading on the gateways, I received very low
> marks on this section. Can anyone help?
>
> ** **
>
> Thanks
>
> ** **
>
> *Jamie Parr*
> Engineer - IT
> jamp...@cisco.com
> Phone: *+44 20 8824 2641*
> Mobile: *+44 7590622049*
>
> ** **
>
> *From:* ccie_voice-boun...@onlinestudylist.com [mailto:
> ccie_voice-boun...@onlinestudylist.com] *On Behalf Of *Pixar Perfect
> *Sent:* 26 February 2013 19:35
> *To:* Steve Keller; GARY CLARK
> *Cc:* CCIE Voice OSL
> *Subject:* [OSL | CCIE_Voice] B Channel Busy Out
>
> ** **
>
> Gary ..you mentioned B channel busyout on service parameter. in my
> understanding this was only needed when you would "download" the GW config
> from CCM i.e., ccm-manager config. it doesn't make any sense to use this
> service parameter as most of the solution guides (INE, IPXEPERT, 360) do
> not encourage the use of ccm-manager config except initial stage of your
> config and then disable it. I have heard ppl who passed just using standard
> configs but not sure if they did the B channel busy out on service
> parameter. 
>
> ** **
>
> ** **
>
> mgcp 
>
> mgcp call-agent 10.10.210.11 -->sub
>
> mgcp dtmf 
>
> mgcp bind ... (2x2)
>
> ** **
>
> ccm-mana fall
>
> ccm-mana music
>
> ccm-mana mgcp
>
> ccm-mana red 10.10.210.10 --> pub
>
> ** **
>
> ** **
>
> if B channel status is *really graded *on the exam then it is one of
> those things that doesn't make sense to have it there but is needed to
> score points [image: Emoji]
>
> ** **
>
> experts,
>
> any comments or advise from the recent Experts ?
>
> ** **
>
> ** **
>
> PIXAR
>
> ** **
>
> ** **
>  --
>
> Date: Mon, 25 Feb 2013 14:31:12 -0500
> From: skeller...@gmail.com
> To: garyclark...@gmail.com
> CC: ccie_voice@onlinestudylist.com
> Subject: Re: [OSL | CCIE_Voice] lab>7 failed for 1%
>
> I recieved 29% in RTP on GW Signalling section and Call Routing as well. I
> am very discouraged i could score very low marks on these sections as i
> took my time and felt like i had nailed them. I scored really well in all
> other areas but failed because of these 2 sections. It is a mystery to me
> what the proctor is doing to arrive at that score, when all my calls
> worked, the debugs matched the requirements, i was binding to the correct
> interfaces, setting up the correct protocol and channels,etc. I would love
> to hear what insight folks have as to why the scores could be so low when
> everything looked to be working beautifully, without breaking NDA of course.
> 
>
>  
>
> thanks
>
> steve
>
>
>
>  
>
> On Mon, Feb 25, 2013 at 1:54 PM, GARY CLARK 
> wrote:
>
> Hi friends,
>
> I got lab 7 in SJC and i completed that in 6 hrs and tested for 2 hrs time.
> 
>
> I thought i have passed 1000% but when i saw my result i was surprised.***
> *
>
> I almost got everywhere 100% except VG / 29% which was 17 marks section.**
> **
>
> Same story with my friends do anyone got 100% in VG for lab 7 
>
> If anyone interested to share the hidden secrets then welcome as people
> are getting lab 7 repeating now very eager to understand what could be
> wrong.
>
> Please email me for further discussion.
>
> We 3 friends attempted out of which i also did busy out channel but that
> also did not helped its 29% only why so 
>
> ** **
>
> Regards
>
>
> ___
> For more information regarding industry leading CCIE Lab training, please
> visit www.ipexpert.com
>
> Are you a CCNP or CCIE and looking for a job? Check out
> www.PlatinumPlacement.com
>
>
>
> ___ For more information
> regarding industry leading CCIE Lab training, please visit
> www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out
> www.PlatinumPlacement.com
>
> ___
> For more information regarding industry leading CCIE Lab training, please
> visit www.ipexpert.com
>
> Are you a CCNP or CCIE and looking for a job? Check out
> www.PlatinumPlacement.com
>

Re: [OSL | CCIE_Voice] B Channel Busy Out

[Jamie Parr (jamparr)]

I am also curious as to the grading on the gateways, I received very low marks 
on this section. Can anyone help?

Thanks

Jamie Parr
Engineer - IT
jamp...@cisco.com
Phone: +44 20 8824 2641
Mobile: +44 7590622049

From: ccie_voice-boun...@onlinestudylist.com 
[mailto:ccie_voice-boun...@onlinestudylist.com] On Behalf Of Pixar Perfect
Sent: 26 February 2013 19:35
To: Steve Keller; GARY CLARK
Cc: CCIE Voice OSL
Subject: [OSL | CCIE_Voice] B Channel Busy Out

Gary ..you mentioned B channel busyout on service parameter. in my 
understanding this was only needed when you would "download" the GW config from 
CCM i.e., ccm-manager config. it doesn't make any sense to use this service 
parameter as most of the solution guides (INE, IPXEPERT, 360) do not encourage 
the use of ccm-manager config except initial stage of your config and then 
disable it. I have heard ppl who passed just using standard configs but not 
sure if they did the B channel busy out on service parameter.


mgcp
mgcp call-agent 10.10.210.11 -->sub
mgcp dtmf 
mgcp bind ... (2x2)

ccm-mana fall
ccm-mana music
ccm-mana mgcp
ccm-mana red 10.10.210.10 --> pub


if B channel status is really graded on the exam then it is one of those things 
that doesn't make sense to have it there but is needed to score points [Emoji]

experts,
any comments or advise from the recent Experts ?


PIXAR



Date: Mon, 25 Feb 2013 14:31:12 -0500
From: skeller...@gmail.com
To: garyclark...@gmail.com
CC: ccie_voice@onlinestudylist.com
Subject: Re: [OSL | CCIE_Voice] lab>7 failed for 1%
I recieved 29% in RTP on GW Signalling section and Call Routing as well. I am 
very discouraged i could score very low marks on these sections as i took my 
time and felt like i had nailed them. I scored really well in all other areas 
but failed because of these 2 sections. It is a mystery to me what the proctor 
is doing to arrive at that score, when all my calls worked, the debugs matched 
the requirements, i was binding to the correct interfaces, setting up the 
correct protocol and channels,etc. I would love to hear what insight folks have 
as to why the scores could be so low when everything looked to be working 
beautifully, without breaking NDA of course.

thanks
steve



On Mon, Feb 25, 2013 at 1:54 PM, GARY CLARK 
mailto:garyclark...@gmail.com>> wrote:
Hi friends,

I got lab 7 in SJC and i completed that in 6 hrs and tested for 2 hrs time.
I thought i have passed 1000% but when i saw my result i was surprised.
I almost got everywhere 100% except VG / 29% which was 17 marks section.
Same story with my friends do anyone got 100% in VG for lab 7
If anyone interested to share the hidden secrets then welcome as people are 
getting lab 7 repeating now very eager to understand what could be wrong.

Please email me for further discussion.
We 3 friends attempted out of which i also did busy out channel but that also 
did not helped its 29% only why so

Regards

___
For more information regarding industry leading CCIE Lab training, please visit 
www.ipexpert.com

Are you a CCNP or CCIE and looking for a job? Check out 
www.PlatinumPlacement.com


___ For more information regarding 
industry leading CCIE Lab training, please visit 
www.ipexpert.com Are you a CCNP or CCIE and looking 
for a job? Check out www.PlatinumPlacement.com
___
For more information regarding industry leading CCIE Lab training, please visit 
www.ipexpert.com

Are you a CCNP or CCIE and looking for a job? Check out 
www.PlatinumPlacement.com