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New Member

Interleaving doesn't work properly for Cisco 3725 router, IP Plus IOS

Dear All,

I am deploying VoIP between 2 sites using Cisco 3725 routers. Currently, interleaving doesn't work properly which result in voice quality problem only during data trafic. Issuing "show int multilink 1" command, I realise that there is no interleaves even though VoIP call and data are traversing on the link.

Attached here is the info for your reference.

Any idea, please help.

Thanks in advance.

Duc

2 REPLIES
New Member

Re: Interleaving doesn't work properly for Cisco 3725 router, IP

Here is the info:

VNHCMR01#sh call active voice brief

: hs. + pid:

dur hh:mm:ss tx:/ rx:/

IP : rtt:

delay://ms

MODEMPASS buf:/ loss /

last s dur:/s

FR [int dlci cid] vad: dtmf: seq:

(payload size)

ATM [int vpi/vci cid] vad: dtmf: seq:

(payload size)

Tele : tx://ms noise: acom: i/o:/ dBm

MODEMRELAY info:// xid:/ total://

speeds(bps): local / remote /

Proxy :

bw: / codec:

tx:

rx:

Telephony call-legs: 1

SIP call-legs: 0

H323 call-legs: 1

MGCP call-legs: 0

Total call-legs: 2

12FF : 5798794hs.1 +202 pid:80 Answer 710 active

dur 00:01:14 tx:3721/74420 rx:3721/74420

Tele 0/0:15:424: tx:74420/74420/0ms g729r8 noise:0 acom:24 i/0:-50/-29 dBm

12FF : 5798794hs.2 +202 pid:81 Originate 81555 active

dur 00:01:14 tx:3721/74420 rx:3721/74420

IP 159.12.56.1:19526 rtt:30ms pl:73890/40ms lost:0/1/6 delay:67/67/107ms g729r8

Telephony call-legs: 1

SIP call-legs: 0

H323 call-legs: 1

MGCP call-legs: 0

Total call-legs: 2

VNHCMR01#sh int mu1

Multilink1 is up, line protocol is up

Hardware is multilink group interface

Description:

Interface is unnumbered. Using address of FastEthernet0/0 (159.12.55.2)

Backup interface Dialer1, failure delay 30 sec, secondary disable delay 30 sec,

kickin load not set, kickout load not set

MTU 1500 bytes, BW 256 Kbit, DLY 100000 usec,

reliability 255/255, txload 33/255, rxload 13/255

Encapsulation PPP, LCP Open, multilink Open

Open: CDPCP, IPCP, loopback not set

DTR is pulsed for 2 seconds on reset

Last input 00:00:00, output never, output hang never

Last clearing of "show interface" counters 00:00:50

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: weighted fair

Output queue: 0/1000/64/0/0 (size/max total/threshold/drops/interleaves)

Conversations 0/5/64 (active/max active/max total)

Reserved Conversations 1/1 (allocated/max allocated)

Available Bandwidth 56 kilobits/sec

5 minute input rate 14000 bits/sec, 69 packets/sec

5 minute output rate 34000 bits/sec, 72 packets/sec

3062 packets input, 100509 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

3078 packets output, 298192 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

0 carrier transitions

VNHCMR01#sh ppp multilink

Multilink2, bundle name is VNHANR01

Bundle up for 02:47:34, 3/255 load

Receive buffer limit 12192 bytes, frag timeout 1000 ms

0/0 fragments/bytes in reassembly list

0 lost fragments, 0 reordered

0/0 discarded fragments/bytes, 0 lost received

0x145A1 received sequence, 0x21A41 sent sequence

Member links: 1 active, 0 inactive (max not set, min not set)

Se0/2, since 02:47:32, 320 weight, 312 frag size

Multilink1, bundle name is VNBHCR01

Bundle up for 16:07:32, 35/255 load

Receive buffer limit 12192 bytes, frag timeout 1000 ms

0/0 fragments/bytes in reassembly list

0 lost fragments, 0 reordered

0/0 discarded fragments/bytes, 0 lost received

0x2DB8D received sequence, 0x536BD sent sequence

Member links: 1 active, 0 inactive (max not set, min not set)

Se0/1, since 16:07:30, 320 weight, 312 frag size

VNHCMR01#sh run int multilink 1

Building configuration...

Current configuration : 380 bytes

!

interface Multilink1

description

bandwidth 256

ip unnumbered FastEthernet0/0

service-policy output llq

backup delay 30 30

backup interface Dialer1

ip tcp header-compression iphc-format

no ip mroute-cache

ppp multilink

ppp multilink fragment delay 10

ppp multilink interleave

ppp multilink group 1

ip rtp header-compression iphc-format

end

VNHCMR01#show policy-map

Policy Map llq

Class voip-rtp

Strict Priority

Bandwidth 50 (%)

Class voip-sig

Bandwidth 8 (kbps) Max Threshold 64 (packets)

VNHCMR01#show class-map

Class Map match-any class-default (id 0)

Match any

Class Map match-any voip-sig (id 1)

Match access-group name VoIP-SIG

Class Map match-any voip-rtp (id 2)

Match ip rtp 16384 16383

VNHCMR01#

New Member

Re: Interleaving doesn't work properly for Cisco 3725 router, IP

Experienced similar problems with 3662 running 12.2, upgraded to 12.3 fixed the problem.

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