02-11-2008 10:36 AM - edited 03-15-2019 08:45 AM
i have a branch office on our IPT system with one t-1 - we want to add another t1. if i multilink these two t-1's will i experience any issues with the voice?
02-11-2008 11:01 AM
Not at all.
02-22-2008 01:43 AM
HI,
I was checking the similar requirements. I think there could be voice quality issue due to physical disparities on T1 circuits. If there are errors/delay on one link, there will be packet losses/jitter causing bad quality to all voip connections.
Thanks,
Kapil Atrish
02-22-2008 09:18 AM
i added the multilink last night and ive noticed a strange issue with QOS. i cant add my service policy to one on the interfaces in the multilink.
SSF_CORP#conf t
SSF_CORP(config)#interface Serial0/1/0:0
SSF_CORP(config-if)#service-policy output EWT_SP
SSF_CORP(config-if)#end
SSF_CORP#sh run int Serial0/1/0:0
interface Serial0/1/0:0
description 2ND T-1
bandwidth 1536
ip unnumbered FastEthernet0/0.10
no ip redirects
no ip unreachables
no ip proxy-arp
encapsulation ppp
ip route-cache flow
ip tcp header-compression iphc-format
ppp multilink
ppp multilink group 90
max-reserved-bandwidth 100
ip rtp header-compression iphc-format
ip rtp compression-connections 64
i also get this when i do a sh policy-map interface Serial0/0/0
Queueing [suspended, using FIFO]
what gives?
02-22-2008 09:46 AM
Hi, configure everything you need under multilink i nterface.
02-22-2008 09:56 AM
i have but check this out. one side of the multi i get this during sh policy-map (router 2)-
Class-map: voice-traffic (match-any)
323169 packets, 42269160 bytes
5 minute offered rate 25000 bps, drop rate 0 bps
Match: ip dscp ef (46)
269929 packets, 38969247 bytes
5 minute rate 22000 bps
Match: ip rtp 16384 16383
53240 packets, 3299913 bytes
5 minute rate 0 bps
Queueing
Strict Priority
Output Queue: Conversation 264
Bandwidth 39 (%)
Bandwidth 1198 (kbps) Burst 29950 (Bytes)
(pkts matched/bytes matched) 26101/3192422
(total drops/bytes drops) 0/0
on the other side i get this (Router1)-
Class-map: voice-traffic (match-any)
406971 packets, 52744324 bytes
5 minute offered rate 54000 bps, drop rate 0 bps
Match: ip dscp ef (46)
406971 packets, 52744324 bytes
5 minute rate 54000 bps
Match: ip rtp 16384 16383
0 packets, 0 bytes
5 minute rate 0 bps
Queueing
Strict Priority
Output Queue: Conversation 264
Bandwidth 39 (%)
Bandwidth 1198 (kbps) Burst 29950 (Bytes)
(pkts matched/bytes matched) 0/0
(total drops/bytes drops) 0/0
router 2 -> (pkts matched/bytes matched) 26101/3192422
router 1 -> (pkts matched/bytes matched) 0/0
same config on both sides. im reading a white paper on this now. ideas?
thanks - jerry
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