Buy or Renew
Buy or Renew
Cisco + Splunk: It’s a new day for your data. Learn more.
 
cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 
cancel
Start a conversation
623
Views
10
Helpful
3
Replies

DSP credit system - allocated credits voice / conferencing

Stefan Weixler
Level 1
Level 1

‎01-11-2016 07:32 AM - edited ‎03-18-2019 11:45 AM

hello,

there is one thing i don't understand regarding the credit system of the DSP. Maybe you can help me.

For a g711 voice call are 15 credits allocated but many other channels uses 23 credits for a voice call. I can't understand where these

23 credits under DSP 1 and 2 come from.

I have looked up the sh voice dsp capabilities but i do not found any entry with these 23 credits.

My second question is if i can see an active conference call with this command or do i see only normal voice calls? I would expect

to see the conference call with 71 credits under dsp 3,4,5 and 6 because of the FLEX_GROUP_CONF. We made some test conferences but do not see these calls under the aforementioned dsp's. Is this normal behaviour or misconfiguration?

sh dsp-group all output:

DSP groups on slot 0:
dsp 1:
  State: UP, firmware: 37.3.6
  Max signal/voice channel: 43/43
  Max credits: 645, Voice credits: 645, Video credits: 0
  num_of_sig_chnls_allocated: 43
  Transcoding channels allocated: 0
  Group: FLEX_GROUP_VOICE, complexity: FLEX
    Shared credits: 220, reserved credits: 0
    Signaling channels allocated: 43
    Voice channels allocated: 20
    Credits used (rounded-up): 425
    Voice channels:
      Ch01: voice port: 0/1/0:15.31, codec: g711ulaw, credits allocated: 15
      Ch02: voice port: 0/0/1:15.7, codec: g711ulaw, credits allocated: 23
      Ch03: voice port: 0/0/1:15.31, codec: g711ulaw, credits allocated: 23
      Ch04: voice port: 0/1/1:15.28, codec: g711ulaw, credits allocated: 23
      Ch05: voice port: 0/0/0:15.29, codec: g711ulaw, credits allocated: 23
      Ch06: voice port: 0/1/1:15.30, codec: g711ulaw, credits allocated: 15
      Ch07: voice port: 0/0/1:15.18, codec: g711ulaw, credits allocated: 15
      Ch08: voice port: 0/0/1:15.30, codec: g711ulaw, credits allocated: 23
      Ch09: voice port: 0/0/1:15.14, codec: g711ulaw, credits allocated: 23
      Ch10: voice port: 0/1/0:15.30, codec: g711ulaw, credits allocated: 23
      Ch11: voice port: 0/1/0:15.29, codec: g711ulaw, credits allocated: 23
      Ch12: voice port: 0/1/0:15.27, codec: None, credits allocated: 15
      Ch13: voice port: 0/0/1:15.10, codec: g711ulaw, credits allocated: 23
      Ch14: voice port: 0/1/1:15.29, codec: g711ulaw, credits allocated: 23
      Ch15: voice port: 0/1/0:15.28, codec: g711ulaw, credits allocated: 15
      Ch16: voice port: 0/0/1:15.6, codec: g711ulaw, credits allocated: 15
      Ch17: voice port: 0/0/1:15.29, codec: g711ulaw, credits allocated: 23
      Ch18: voice port: 0/0/1:15.23, codec: g711ulaw, credits allocated: 23
      Ch19: voice port: 0/0/1:15.26, codec: g711ulaw, credits allocated: 23
      Ch20: voice port: 0/1/1:15.31, codec: g711ulaw, credits allocated: 23
  Slot: 0
  Device idx: 0
  PVDM Slot: 0
  Dsp Type: SP2600

dsp 2:
  State: UP, firmware: 37.3.6
  Max signal/voice channel: 43/43
  Max credits: 645, Voice credits: 645, Video credits: 0
  num_of_sig_chnls_allocated: 43
  Transcoding channels allocated: 0
  Group: FLEX_GROUP_VOICE, complexity: FLEX
    Shared credits: 391, reserved credits: 0
    Signaling channels allocated: 43
    Voice channels allocated: 11
    Credits used (rounded-up): 254
    Voice channels:
      Ch01: voice port: 0/1/0:15.25, codec: g711ulaw, credits allocated: 23
      Ch02: voice port: 0/0/0:15.28, codec: g711ulaw, credits allocated: 23
      Ch03: voice port: 0/1/0:15.26, codec: g711ulaw, credits allocated: 23
      Ch04: voice port: 0/0/1:15.28, codec: g711ulaw, credits allocated: 23
      Ch05: voice port: 0/0/1:15.11, codec: g711ulaw, credits allocated: 23
      Ch06: voice port: 0/0/1:15.27, codec: g711ulaw, credits allocated: 23
      Ch07: voice port: 0/1/1:15.27, codec: None, credits allocated: 15
      Ch08: voice port: 0/0/0:15.30, codec: g711ulaw, credits allocated: 23
      Ch09: voice port: 0/0/1:15.22, codec: g711ulaw, credits allocated: 23
      Ch10: voice port: 0/0/0:15.31, codec: g711ulaw, credits allocated: 23
      Ch15: voice port: 0/0/1:15.21, codec: g711ulaw, credits allocated: 23
  Slot: 0
  Device idx: 0
  PVDM Slot: 0
  Dsp Type: SP2600

dsp 3:
  State: UP, firmware: 37.3.6
  Max signal/voice channel: 42/43
  Max credits: 645, Voice credits: 645, Video credits: 0
  num_of_sig_chnls_allocated: 34
  Transcoding channels allocated: 0
  Group: FLEX_GROUP_VOICE, complexity: FLEX
    Shared credits: 573, reserved credits: 0
    Signaling channels allocated: 34
    Voice channels allocated: 0
    Credits used (rounded-up): 0
  Group: FLEX_GROUP_CONF, complexity: SECURE CONFERENCE
    Shared credits: 0, reserved credits: 72
    Codec: SECURE_CONF_G711, maximum participants: 8
    Sessions per dsp: 9
  Slot: 0
  Device idx: 0
  PVDM Slot: 0
  Dsp Type: SP2600

dsp 4:
  State: UP, firmware: 37.3.6
  Max signal/voice channel: 43/43
  Max credits: 645, Voice credits: 645, Video credits: 0
  num_of_sig_chnls_allocated: 0
  Transcoding channels allocated: 0
  Group: FLEX_GROUP_CONF, complexity: SECURE CONFERENCE
    Shared credits: 0, reserved credits: 645
    Codec: SECURE_CONF_G711, maximum participants: 8
    Sessions per dsp: 9
  Slot: 0
  Device idx: 1
  PVDM Slot: 0
  Dsp Type: SP2600

dsp 5:
  State: UP, firmware: 37.3.6
  Max signal/voice channel: 43/43
  Max credits: 645, Voice credits: 645, Video credits: 0
  num_of_sig_chnls_allocated: 0
  Transcoding channels allocated: 0
  Group: FLEX_GROUP_CONF, complexity: SECURE CONFERENCE
    Shared credits: 0, reserved credits: 645
    Codec: SECURE_CONF_G711, maximum participants: 8
    Sessions per dsp: 9
  Slot: 0
  Device idx: 1
  PVDM Slot: 0
  Dsp Type: SP2600

dsp 6:
  State: UP, firmware: 37.3.6
  Max signal/voice channel: 42/43
  Max credits: 645, Voice credits: 645, Video credits: 0
  num_of_sig_chnls_allocated: 0
  Transcoding channels allocated: 0
  Group: FLEX_GROUP_CONF, complexity: SECURE CONFERENCE
    Shared credits: 0, reserved credits: 645
    Codec: SECURE_CONF_G711, maximum participants: 8
    Sessions per dsp: 9
    Conference sessions:
      Sess01: Credits allocated: 71
  Slot: 0
  Device idx: 1
  PVDM Slot: 0
  Dsp Type: SP2600


DSP groups on slot 1:
 This command is not applicable to slot 1

if you need more information to help, let me now. ;)

kind regards

Stefan

Labels:
0 Helpful
3 Replies 3

Ayodeji Okanlawon
VIP Alumni
VIP Alumni

‎01-11-2016 09:41 AM

Hi Stefan,

1. It does look odd that for each G711 call 23 credits is allocated. Each G711 call in flex mode should use 15 credits. I wrote a few documentation a while back to explain a few of the technicalities in this. Please refer to them below.

I am not sure where the 23 is coming from. This might need to be escalated to TAC to get to the bottom of it.

https://supportforums.cisco.com/document/123061/understanding-output-show-voice-dsp-group-all

https://supportforums.cisco.com/document/123126/cisco-pvdm2-and-pvdm3-dsp-creditmips-allocation

2. For the conferencing, it looks as if dsp 6 is the only one with one active conference session going on. We can see that a total of 71 credits were used up out of the reserved 645 credits..

Group: FLEX_GROUP_CONF, complexity: SECURE CONFERENCE
    Shared credits: 0, reserved credits: 645
    Codec: SECURE_CONF_G711, maximum participants: 8
    Sessions per dsp: 9
    Conference sessions:
      Sess01: Credits allocated: 71

Please rate all useful posts

Stefan Weixler
Level 1
Level 1
In response to Ayodeji Okanlawon

‎01-13-2016 04:30 AM

Hi Ayodeji,

thanks for your reply. I have already read your documentation. Great work!

We have found an explanation for the 23 credits! It's because we use SRTP with g711 calls.

When we look at the capabilites of the dsp we see that 27 g711_srtp calls per dsp are possible. For that dsp we have 645 credits available. If we divide the available credits with the value of 27 we got the result 23,8. Because Cisco rounds this value down we got the 23!

Voice Channels:
    g711perdsp = 43,  g726perdsp = 32, g729perdsp = 20, g729aperdsp = 32,
    g723perdsp = 0 ,  g728perdsp = 20, g711_5msperdsp = 28, gsmamrnbperdsp = 20,
    ilbcperdsp = 20,  isacperdsp = 10, modemrelayperdsp = 20,
    g72264Perdsp = 32, h324perdsp = 20,
    m_f_thruperdsp = 43, faxrelayperdsp = 32,
    maxchperdsp = 43, minchperdsp = 20,
    srtp_maxchperdsp = 27, srtp_minchperdsp = 14, faxrelay_srtp_perdsp = 14,
    g711_srtp_perdsp = 27, g729_srtp_perdsp = 14, g729a_srtp_perdsp = 24
    gnx64_srtp_perdsp = 27

kind regards

Stefan

Ayodeji Okanlawon
VIP Alumni
VIP Alumni
In response to Stefan Weixler

‎01-13-2016 05:50 AM

Stefan,

Thanks for updating the thread. Great work (+5)

Please rate all useful posts
0 Helpful
Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Customers Also Viewed These Support Documents