Packet loss shows in SSA under QOS (5.0)

[Yaze]

Here is the setup 130 ip phones with a PRI on a 10/100 mbs switched network with 1gb copper links to remote cabinets (cabling is new and is all cat6), we are using only avaya 5610/20s on the voice network no computer is plugged exept the voicemail server, i am using the second interface on the ipo to connect to the data network (on different switche)for user voice apps... No QOS or VLAN was implemented since it's an independent voice network...

From time to time i have an entry in ssa that shows packet loss on certain extensions 60-90% on one call(not alwas the same ones and mostly on the remote sites)... The user tells me he's going to make a bunch of calls and once in a while he s going to get a bad quality one but the rest are fine...

codec used is g729a, all extensions are allowed to connect to an ip extension directly...

I'm thinking of enabling qos on the network even though i am pretty sure it won't change a thing, and maybe opening a ticket with the switch provider (smc tigerswitch 6128pl2 latest firmware)...

Any ideas/help is welcome, thanks.

Yaze.
Chaos, Panic and Disorder, my work here is done.

 

[tlpeter]

Put in a good switch and see what happens




ACS - Implement IP Office
ACA - Implement IP Telephony -- ACA - Design IP Telephony
ACA - Voice Services Management
______________
Women and cats can do as they please and men and dogs should relax and get used to the idea!

 

[hbsurfn]

I am seeing a similar problem in SSA when monitoring a voip call. The round trip delay will all of a sudden go to 1001ms for about 5 seconds then back to normal range of 2-25ms. I get tons of alarms for this too.

ACA
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CompTIA Convergence+
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CCVP

 

[crashtest1000]

We are seeing the same thing on our SIP connection directly into LAN2. And on top of that the carrier is delivering it over a dedicated fiber. Have not got around to figuring out what the issue is.

 

[mattKnight]

Don't discount the possibility that the NIC on the IPO is faulty. I have had a number of where the IPO drops packets randonmly (and when I say drops packets I mean 90% of them)

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[davea2]

We have a QoS problem on R5 - have you guys tried with 4.2, or did you not have a prob before upgrading to 5?
We were solid as a rock on 4.2.20, and now major Qos probs.
Avaya are asking for SysMon and Wireshark traces but the more i hear, the more I think it's R5

another thread here:

http://www.tek-tips.com/viewthread.cfm?qid=1570433

http://www.ipofficeforum.co.uk

UK Based IP Office Discussion

 

[TomMills]

Don't discount the possibility that the NIC on the IPO is faulty. I have had a number of where the IPO drops packets randonmly (and when I say drops packets I mean 90% of them)

Yup. saw this once troubleshooting podgy voicemail. spent ages on it before they decided to tell me all the phone managers were playing up too.

http://www.twitter.com/Millsano85

See what my brain does when it's not thinking about phones.

 

[amriddle01]

Of course a good engineer would have enquired if they were having any other problems when he arrived on site to help locate the issue .....just teasing Tom

ACS - IP Office Implement

"What the Crocodile Hat....was that?

 

[TomMills]

I just assumed the client had provided full details of what was wrong. i am silly sometimes.

http://www.twitter.com/Millsano85

See what my brain does when it's not thinking about phones.

 

[brainey1]

Are you having the QoS trouble on all calls or just on ip trunks?

 

[davea2]

Anything IP realated, so even an internal call will be useless!

http://www.ipofficeforum.co.uk

UK Based IP Office Discussion

 

[amriddle01]

For testing I would put the IP Office into a switch with nothing else on but 2 or 3 IP phones and then re-test, it's hard for Avaya to argue with that

ACS - IP Office Implement

"What the Crocodile Hat....was that?

 

[groundedagain]

We have also had a number of IP500's with falty NICs.

Jason



Work is the only way I can feed my habit....

Flying, Flying, flying & Flying

Mere Mortals
Brisbane, Australia.

http://www.meremortals.com.au

 

[brainey1]

groundedagain, when the nic was faulty, was it completely down ot just have problems from time to time?

 

[tlpeter]

You can test this with putting everything on the second lan temporary
I had it once too
more then five ipphones gave big problems



ACS - Implement IP Office
ACA - Implement IP Telephony -- ACA - Design IP Telephony
ACA - Voice Services Management
______________
Women and cats can do as they please and men and dogs should relax and get used to the idea!

 

[davea2]

When we had our SIP trunk on LAN2 the problems were much worse.
We now have everything on LAN1 and the situation is bearable - you get clicks on the conversation instread of drop-outs of up to 2 seconds.
I am discounting our LAN or faulty hardware, as if I downgrade to 4.2 the prblem vanishes
I currently have SysMon traces, wireshark traces and SSA screenshots with Avaya (UK)
Dave

http://www.ipofficeforum.co.uk

UK Based IP Office Discussion

 

[VanZenden]

davea2,

Did you resolve QoS issues on R5? I'm asking because I have similar issues...

 

[hairlessupportmonkey]

are you using a Gbit switch? if so, can you set the port on connected to the IPO NIC to 100Mbit / full rather than auto.

 

[VanZenden]

I'm using 100 Mbit switch. I think its set to auto. I'll change it to 100Mbit/full.

From time to time, I have also packet loss on SIP trunks (IPO LAN2 port), QoS is enabled.

 

[VanZenden]

If I think again LAN1 is connected to Gbit port.
I'll swap it to 100Mbit port ...