mattjvillemure
asked on
Router behind ISP Cisco IAD device
Hi, I don't even know how to word this question so here I go. I have an interesting situation where our ISP is providing Voice and Data services via. a Cisco IAD 2431 device. We have two full T1 circuits both going into the serial interfaces of the IAD device. There are two open f/E interfaces on the IAD for us to plug into to access the data portion of the network. We have no rights or access to the IAD for configuration or setup. And therefore are limited to what we can do. Our ultimate goal is to configure SIP and AutoQos on a router so we can manage and mark voice traffic (SIP/RTP) with priority but can not do this solely with a switch or can we?
Our current setup:
NIU ---> (T0/T1) IAD 2431 (f/E0) ---> ASA 5510 ---> Cat. 3570G-(PoE) ---> Network/IP Phones/Ect.
From my research we can not do QoS with this setup?
We want to do this:
NIU ---> (T0/T1) IAD 2431 (f/E0) ---> Cisco 2821 ---> ASA 5510 ---> Cat. 3570G-(PoE) ---> Network/IP Phones/Ect.
The 2821 has two GigE Interfaces on it (LAN) and 1 (WIC T1) on it. How can I set this up and defeat this nightmare and pathetic setup that XO has given us?
Please help!!!!
Our current setup:
NIU ---> (T0/T1) IAD 2431 (f/E0) ---> ASA 5510 ---> Cat. 3570G-(PoE) ---> Network/IP Phones/Ect.
From my research we can not do QoS with this setup?
We want to do this:
NIU ---> (T0/T1) IAD 2431 (f/E0) ---> Cisco 2821 ---> ASA 5510 ---> Cat. 3570G-(PoE) ---> Network/IP Phones/Ect.
The 2821 has two GigE Interfaces on it (LAN) and 1 (WIC T1) on it. How can I set this up and defeat this nightmare and pathetic setup that XO has given us?
Please help!!!!
Last Comment
ASKER
Thanks for the response, well I did wrong and managed to get this and I won't say how. Can you or anyone possibly assist on where I can add a QoS policy which will give 100% priority to POTS and SIP service over data and therefor if SIP and POTS traffic comes in then data traffic drops to maintain VoIP communication and call quality? Here is my running-conf the IPs have been masked for privacy:
*Sensitive information removed by Netminder 22 June 2006*
*Sensitive information removed by Netminder 22 June 2006*
You'd want it on the two serial interfaces, and it's there now. However, you're semi-screwed because it's not multilink; choosing appropriate values will be difficult because the two T1s operate independently. Not to mention, per-packet load sharing can mean out of order packet delivery, which can really screw with VoIP.
However, most sites download more than they upload. Therefore, LLQ is more pertinent on the ISP's router than it is on this IAD. You'll need to call them.
However, most sites download more than they upload. Therefore, LLQ is more pertinent on the ISP's router than it is on this IAD. You'll need to call them.
ASKER
Will this addition work? Except replacing IAX protocols with SIP?
*Sensitive information removed by Netminder 22 June 2006*
*Sensitive information removed by Netminder 22 June 2006*
OK, let's back up a bit here. We're tossing around solutions of different types, but we haven't yet defined the problem.
What is the problem we're trying to fix? Are you having performance problems over the T1 links? If so, is it during uploads, downloads, or all the time?
The IAD is already configured to prioritize anything marked precedence 3 or 5 going out the T1s, except that everything coming into the Ethernet port is marked down to 0.
If you are doing your own VoIP in addition to the VoIP provided by XO, you should probably work WITH them to get the results that are best for everyone, rather than hacking up their box, etc. First off, you should probably make sure they're prioritizing VoIP coming TO you, as that's more likely to experience congestion and queueing. Then, have them remove the input policy on FE0, so that your existing VoIP traffic can qualify for QoS. After that, re-evaluate how things are working and see what needs to be tweaked.
What is the problem we're trying to fix? Are you having performance problems over the T1 links? If so, is it during uploads, downloads, or all the time?
The IAD is already configured to prioritize anything marked precedence 3 or 5 going out the T1s, except that everything coming into the Ethernet port is marked down to 0.
If you are doing your own VoIP in addition to the VoIP provided by XO, you should probably work WITH them to get the results that are best for everyone, rather than hacking up their box, etc. First off, you should probably make sure they're prioritizing VoIP coming TO you, as that's more likely to experience congestion and queueing. Then, have them remove the input policy on FE0, so that your existing VoIP traffic can qualify for QoS. After that, re-evaluate how things are working and see what needs to be tweaked.
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ASKER
Thank you all for your help. To clarify... Yes when we are using SIP any communication go out from our system such as voice to another caller has 0 latency and the caller has little to no issue hearing us. However, when they communicate with us there is a 5 second delay at times. Also we are having issues with echos and jitter. This is why I want to set up QoS. Does this help clarify?
ASKER
And I will communicate my needs to XO. I don't plan on tweaking their config. If I am at my wits end and am left no option but to switch to another provider because of their ignorance I will tweak it and then look at the same time as I have nothing to loose by doing so.
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What are you trying to accomplish?
If you're having QoS problems over the T1s, you need to have XO enable an appropriate QoS method (LLQ with CBWFQ) on the multilink logical interface in the 2431, and do the same on their aggregation/distribution router on the other end. You might be able to do the marking in the 3570; you might lose the markings through the ASA though (I simply don't know).