Feb 02, 2012  I am preparing for CCNA Voice and I will like to setup my own lab. I will appreciate if I can be adviced what router, switches and IP phone will be needed for a good lab and the number. Cisco Voice Lab Cisco 3825 Configuration Guide. Updated a year ago. About 0 Discussions 0 Change.

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Rule #5: No Early Career Advice. Rule #6: Homework / Educational Questions must display effort. Rule #7: No Political Posts. Hello everyone. I recently got a decommissioned Cisco 3825 ISR from a friend, and it has a couple of things that I'm not familiar with that I would like to learn more about. For starters, I'm only at or below CCNA level of knowledge and this is my first router I've gotten to play with outside of academia. It came with a NMD-36-ESW which is cool since it can support Layer 3.

Also it has a VWIC-1MFT-T1 module which I understand is for T1 lines, which I don't really have access in a residential setting. Finally, it has a NM-CUE which has a processor, RAM and small hard drive (my understanding is it's for VOIP phones mailbox storage). One of the two clips holding down the processor heatsink was missing: So I took a small loop off the end of a paperclip and used it to try to fix things, bending the ends 90 degrees on the bottom of the motherboard avoiding any traces. Does anyone see a problem with this? Basically I just want to learn more about the equipment I got and what I could potentially do with it. Any level of knowledge about this router and it's modules would be appreciated, especially the NM-CUE (can I load another OS on it?). I can take pictures of anything upon request.

EDIT: All the pictures you might want:. The 3825 is a beast. Since it already has a NM-CUE (you are right - voicemail) and a VWIC-1MFT-T1 it would make an excellent voice router - but honestly this router can pretty much handle anything you throw at it. Funny you should mention the heatsink - I just scored a 2811 the other day with a NM-CE-BP which had the EXACT same issue! I was debating the paperclip idea as well - but it is just a content engine; I don't even know where I would find software for it - in your case you probably want to save that NM-CUE so just make sure the paperclip is not touching any other soldered components and you should be fine. You might want to clean off the chip beneath it with some alcohol or Arctic Silver Arcticlean or something and re-apply thermal paste.

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Basically this is your voice lab router of doom - but you can do whatever on it. Stateful firewall - IPS - voice - vpn - going to laugh at whatever you throw at it. Start here for the NM-CUE: Also: Have fun mayne. I was wondering about the whole VOIP thing, I was wondering why the previous owner didn't go with the POE NMD-36-ESW-PWR. But what do I know lol? Those clips always seem to come off, I don't know why they are still being used.

I've had to do the same thing with an HP desktop northbridge (maybe southbridge don't remember) my sister had. I thought about going the whole alcohol cleanse and applying the thermal compound, but I wasn't sure if I should use my standard Artic Silver 5 or if I should get actual thermal paste of some sort (I hear for northbridges they use a cermic based paste to stick the heatsinks on). It's a shame that I don't have my CCNA yet, if I was going CCIE Voice track I imagine this router would be perfect. I feel it's wasted on me to be honest. Also it has a VWIC-1MFT-T1 module which I understand is for T1 lines, which I don't really have access in a residential setting.

Make a T1 hard loop plug and you can play with the line being 'up'! This module is a bit tricky as it's a voice T1 module, and needs a bit of love to get into a clear channel data config. It came with a NMD-36-ESW which is cool since it can support Layer 3.

I used this module in dynmamips to do some CC. study back in the day. It's does L2 and L3, you're lucky to get your hands on it! Thanks for the advice about the hard loop, this is the kind of thing I'm looking for! To me I was interested as to why clients on the NMD-36-ESW couldn't ping the router interface IPs, unless I actually ran a cable from the router interface into a port on the switch module.

Seemed to me like it should act like home routers that contain an integrated switchport. I had to have my CCNP friend explain that I had to set an IP address on a VLAN and assign switch ports to that VLAN in order for it to work as I expected. But hey I'm learning more each day. A 3825 with the voice hardware is well suited for learning.

As a VoIP technician, I support ISR voice deployments. Judging by the hardware configuration, this was likely a phone system for a medium sized business. The vwic T1 card is used to receive Q.931 signalling, aka PRI, from a VoIP service provider. PRI signalling sends incoming DID (direct inward dials, i.e. Phone numbers) as four digits, which the dial plan configuration then translates to internal extensions. Unfortunately, you probably won't get to play much with PRI interface as you would need an active T1 line sending Q.931 to test any of this.

The CUE module is indeed the voice mail system, amongst other things. It is actually an internal Linux based server, but it isn't like administering a real Linux server. The web interface for this is typically 10.1.10.1 if you want to check it out. You can also log into the CUE module from the command line as well. The voice module also acts as a TFTP server for the phone loads (firmware and.cfg files). I think it would be worth your while to pick up a couple of cisco IP phones, and make them able to dial one another.

You won't be able to make outbound calls without a connection to the PSTN. For PSTN connection, this device will support SIP trunks, T1 PRI or even POTS lines using an FXO module. It's probably the most feasible to for a home lab to use a POTS line with an FXO module. The layer 3 switch ports are a nice hardware addition as well, you can learn how to set up vlan interfaces, bridged virtual interfaces and bridge groups. What version of IOS does this run? It may have the ability to do other cool things, like set up VPN tunnels or remote SSL access. Edit: if it's not too late, don't erase the startup config!

If you clear the config, you cannot see how the voice stuff is set up, and it is very tedious to rebuild the voice setup. Thank you for this information! The image on the router currently is c3825-ipbase-mz.123-11.T5.bin. I would be interested in learning between the 12.3 and 12.4, ipbase, entbase, entservices, spservicesk9, advipservicesk9, and adventerprisek9 images, although I'm sure I can find that information online. Unfortunately my friend who acquired this router for me after it was decommissioned (not sure as to the details, I got the impression this was because of a datacenter move) told me to wipe all of the configs, and after logging into the NM-CUE for the first time I did a restore factory defaults and copy run start afterwards, so as far as I am aware the config is gone (I did briefly glance over it beforehand; Lots and lots of extensions and usernames).

I have accessed the HTTP webpage, although I haven't made it in FTP yet, so I hope all of the VOIP phone firmware is still on the hard drive. From what I was looking online about the 3825, it has the ability to do VPN or IPSec via hardware. EDIT: I guess I could always access the drive via my PC, I think I saw reiserfs during the NM-CUE reboot so perhaps my linux machine can read that. Ipbase is the most limited 12.X and below IOS image. I don't think this has the cryptography functions required for VPN. The current image is the 15.X series of code. The 15.X IOS releases don't have different images for the different feature sets as IOS 12 and before did.

All features are included in the 15.X code, but you need to purchase licenses to unlock features to use them. Seeing as you only have a base image, you wouldn't loose anything going to the version 15 code. If you only performed factory reset from the CUE web interface, you probably just reset the voicemail module. All of the ephone, ephone-dn, dial plan and tftp commands still may be configured in the flash (this part of the voice configuration lives in the flash with the router configurations).

Do a 'show run' to see if it is still there. Thanks for the interest everyone!

So far I have done the following with this router:. Saved the IOS image to my TFTP server. Reset the router to factory defaults (can't remember if I had to reload the IOS image as well, I did with the PIX). Configured one gigabit router interface for a new class C network. Configured one switchport interface to be Layer 3, and gave it a different class C network. Put the rest of the switchport interfaces in a new VLAN and gave that VLAN a third class C network. Set a gateway of last resort to point to my home network router (frontier's decent Motorola wireless router).

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Gave my home network router static routes to all of my internal networks (I couldn't figure out how to get RIP or some other routing protocol working on my home router). My ISR is just using static routes currently, although I played with RIP a bit. Set up IP NAT with no-overload so that all clients on the class C networks can access my home network Class B, as well as hit the internet. This part doesn't always work and I'm still troubleshooting it. I honestly didn't think I would need to use NAT, but I can't get anything behind my ISR to work with the internet otherwise. I have a 3825 that was a lab router and I Fucking love it. That cue is crazy expensive, even used.

If it has that and a vwic card then it is probably packed with dsp's in the form of pvdm-2 modules(they look like ram). If you DON'T plan on studying voip then do someone else a favor and sell this too them. What you have is extremely useful to someone studying for ccna/ccnp voice. The 3825 has an adventerpriseip ios available that handlers policy based routing which is nice if you're studying ccnp route or looking to go deep into ccie level stuff. I'm pretty sure that ios supports IS-IS which is nice if you plan on going down the service provider track(though you'd be better learning some junos at that point).

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