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CUCM 8.5 - C2901 MTP - BANDWIDTH ISSUE

Unanswered Question
Feb 14th, 2012
User Badges:

Hello.

We are running a CUCM 8.5 cluster and we have a Cisco 2901.

The 2901 is our MTP, CFB and CUBE.



We have two interfaces Gigabit in that 2901, one interface see to the PSTN WAN and the otherone to the LAN IP Phones.


Whenever we put an inbound or outbound PSTN call, in the CUBE/MTP that call using 138 kbps (average) only for incoming traffic in both interface, but in the interfaces's switch directly connected to that 2901 only we see 85 kbps (average) in the outbound traffic.


Why the MTP generate more incomming traffic like if the C2901 re-process the RTP to use MTP,...but I don´t know that is normal or no ?



We use Software MTP G711a.

We have the same Media Resource Group for both (IP Phones and SIP Trunk)

We have check the MTP checkbox on the SIP Trunk page.

We have all regions with G711

We attach you the configuration in the CUBE.

We attach the topology in PPT file.



My version in my 2901 is: Version 15.1(4)M2


My MRGL have



MRG_PUBLIC_PUBLISHER

MRG_MTY1



My MRG have



MRG_PUBLIC_PUBLISHER

               ANN_CUCM851

MOH_CUCM851


MRG_MTY1

CNF2921NAU

MTPG711aNAU


MRG_CUARENTENA

CFB_CUCM851

CFB_CUCM852

MTP_CUCM851

MTP_CUCM852

MTPG729nau



Add the evidence in

CUBE_GOLD#sh int gig0/0 | inc 30  sec


  30 second input rate 137000 bits/sec, 100  packets/sec


  30 second output rate 86000 bits/sec, 50  packets/sec


CUBE_GOLD#


CUBE_GOLD#


CUBE_GOLD#sh int gig0/1 | inc 30  sec


  30 second input rate 138000 bits/sec, 102  packets/sec


  30 second output rate 88000 bits/sec, 51  packets/sec


CUBE_GOLD#



SW_ISOL_7.01#sh int fas0/17 | inc 30  sec


  30 second input rate 88000 bits/sec, 51  packets/sec


  30 second output rate 87000 bits/sec, 51  packets/sec


SW_ISOL_7.01#sh int fas0/18 | inc 30  sec


  30 second input rate 89000 bits/sec, 50  packets/sec


  30 second output rate 90000 bits/sec, 52  packets/sec


SW_ISOL_7.01#



SW_GOLD_MTY#sh int gig0/13 | inc 30  sec


  30 second input rate 89000 bits/sec, 50  packets/sec


  30 second output rate 90000 bits/sec, 51  packets/sec


SW_GOLD_MTY#


SW_GOLD_MTY#



CUBE_GOLD#show dspfarm dsp all     


SLOT DSP VERSION  STATUS CHNL USE   TYPE     RSC_ID BRIDGE_ID PKTS_TXED PKTS_RXED



0    1   28.3.2   UP     N/A  FREE  conf     2      -         -         -       



Total number of DSPFARM DSP channel(s)  1



CUBE_GOLD#sh sccp call-identifications


sess_id    callref    conn_id    conn_id_tx  spid       rtp_callid msp_callid bridge_id  codec   stype prof_id


16777245   -          16777271   0           16777216   18569      18570      60         g711a   mtp   4


16777245   -          16777270   0           16777216   18566      18570      59         g711a   mtp   4



Total number of active session(s) 1


CUBE_GOLD#


CUBE_GOLD#sh call  act


CUBE_GOLD#sh call active voice  brief


<ID>: <CallID>  <start>.<index> +<connect> pid:<peer_id> <dir>  <addr> <state>


  dur hh:mm:ss  tx:<packets>/<bytes>  rx:<packets>/<bytes>


IP <ip>:<udp>  rtt:<time>ms pl:<play>/<gap>ms  lost:<lost>/<early>/<late>


   delay:<last>/<min>/<max>ms  <codec>


 


media inactive detected:<y/n> media  cntrl rcvd:<y/n> timestamp:<time>


 


long duration call detected:<y/n>  long duration call duration :<sec>  timestamp:<time>


  MODEMPASS <method>  buf:<fills>/<drains> loss <overall%>  <multipkt>/<corrected>


   last <buf event time>s  dur:<Min>/<Max>s


FR <protocol> [int dlci cid]  vad:<y/n> dtmf:<y/n> seq:<y/n>


  <codec> (payload  size)


ATM <protocol> [int vpi/vci cid]  vad:<y/n> dtmf:<y/n> seq:<y/n>


  <codec> (payload  size)


Tele <int> (callID) [channel_id]  tx:<tot>/<v>/<fax>ms <codec> noise:<l>  acom:<l> i/o:<l>/<l> dBm


  MODEMRELAY  info:<rcvd>/<sent>/<resent> xid:<rcvd>/<sent>  total:<rcvd>/<sent>/<drops>


         speeds(bps): local  <rx>/<tx> remote <rx>/<tx>


Proxy <ip>:<audio  udp>,<video udp>,<tcp0>,<tcp1>,<tcp2>,<tcp3>  endpt: <type>/<manf>


bw: <req>/<act> codec:  <audio>/<video>


  tx: <audio pkts>/<audio  bytes>,<video pkts>/<video bytes>,<t120 pkts>/<t120  bytes>


rx: <audio pkts>/<audio  bytes>,<video pkts>/<video bytes>,<t120 pkts>/<t120  bytes>





Telephony call-legs:  0


SIP call-legs:  2


H323 call-legs:  0


Call agent controlled call-legs:  0


SCCP call-legs:  2


Multicast call-legs:  0


Total call-legs:  4


0    : 18566 17:59:23.434 UTC Thu Feb 9  2012.1 +0 pid:0 Originate  connecting


dur 00:03:57 tx:11833/1893280  rx:11829/1892640


IP 172.19.1.254:24708 SRTP: off rtt:0ms  pl:0/0ms lost:0/0/0 delay:0/0/0ms g711alaw TextRelay:  off


media inactive detected:n media contrl  rcvd:n/a timestamp:n/a


long duration call detected:n long  duration call duration:n/a timestamp:n/a



0    : 18567 17:59:23.444 UTC Thu Feb 9  2012.1 +7720 pid:100 Answer 8182862941 active


dur 00:03:49 tx:11829/1892640  rx:11833/1893280


IP 172.19.1.254:17958 SRTP: off rtt:0ms  pl:0/0ms lost:0/0/0 delay:0/0/0ms g711alaw TextRelay:  off


media inactive detected:n media contrl  rcvd:n/a timestamp:n/a


long duration call detected:n long  duration call duration:n/a timestamp:n/a



0    : 18568 17:59:23.454 UTC Thu Feb 9  2012.1 +7710 pid:2050 Originate 82213404 active


dur 00:03:49 tx:11833/1893280  rx:11829/1892640


IP 201.158.135.37:47082 SRTP: off rtt:0ms  pl:0/0ms lost:0/0/0 delay:0/0/0ms g711alaw TextRelay:  off


media inactive detected:n media contrl  rcvd:n/a timestamp:n/a


long duration call detected:n long  duration call duration:n/a timestamp:n/a



0    : 18569 17:59:23.844 UTC Thu Feb 9  2012.1 +0 pid:0 Originate  connecting


dur 00:03:56 tx:11829/1892640  rx:11833/1893280


IP 172.31.3.3:27538 SRTP: off rtt:0ms  pl:0/0ms lost:0/0/0 delay:0/0/0ms g711alaw TextRelay:  off


media inactive detected:n media contrl  rcvd:n/a timestamp:n/a


long duration call detected:n long  duration call duration:n/a timestamp:n/a




Telephony call-legs:  0


SIP call-legs:  2


H323 call-legs:  0


Call agent controlled call-legs:  0


SCCP call-legs:  2


Multicast call-legs:  0


Total call-legs:  4



CUBE_GOLD#




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