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plsit

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Cisco 2621 - trouble adding dial-peer

We have a Cisco 2621 router that does dhcp, connects our frame circuit, and interfaces the local POTS lines to our Cisco VOIP system.  It has a HDVM with 4FXO and 12FXS.  There are about 20 dial-peer statements in there now but when I try to add one it gives me "ERROR: could not add peer".  First thought is that it doesn't have enough memory but this thing isn't doing a whole lot.  I'm not Cisco certified anything so I may not be looking at the right stuff but a "show ver" reports:

32K bytes of non-volatile configuration memory.
32768K bytes of processor board System flash (Read/Write)

A "show run" reports:
Current configuration : 7459 bytes

And a "show flash" reports:
Partition   Size    Used      Free      Bank-Size  State          Copy Mode
  1        32256K  14915K    17340K    16384K      Read/Write     Direct

To me, there is plenty of memory to add a dial peer but again I'm not an expert at this.  What else could be the problem?  
IP TelephonyRouters

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plsit
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Tim_Jr

You would know if you were running out of memory when you try to do a save. It would say something like, "buffer full" or something. If that is the case you could compress the config with a "service compress-config" command.

 
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Les Moore
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Can you demonstrate exact commands that you are trying to use to add the dial peer, and the exact response from the router?

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Tim_Jr

I would assume you're using the other dial peers as 'templates'. Show us your work, or even better the config.


Thanks plsit
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plsit

ASKER

I've attached a "show ver", a "show run", and at the bottom is the attempt to add the dial-peer.  Thanks for the help.
ccrou03.cap.txt
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plsit

ASKER

Thanks for the reply.

I saw this suggestion too and tried it on a limited basis.  Here is the only place the max-dn shows up in the config:
------
call-manager-fallback
 ip source-address 192.168.104.1 port 2000
 max-ephones 24
 max-dn 96
 default-destination 3100
 access-code pri 9 direct-inward-dial
------

I tried dropping it to 90 when I first tried it but after you suggested it I tried it again going all the way down to 30.  It still gave the same response of: ERROR: could not add peer.  

Could/should I try and go lower?  Is this the correct max-dn to change or is there another one?

Thanks for the help.
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plsit

ASKER

Well, I decided to just try and go lower with it, down to 10, and was able to add my dial-peer.  As I re-read the info on max-dn, I understand it limits the number of virtual voice ports.  What is a virtual voice port and what effect might it have going from 96 to 10?
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vjlp
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Iam not a voip person...but from what i can understand ... the max-dn specifies the number of phones (or phone-numbers) that are allowed to register with it (in fallback mode).

So, the phones have only 1 line, then max-dn 10 implies only 10 phones can register with it.
if the phones have 2 lines, then max-dn 10 implies only 5 phones can register.

You may want to increase the DRAM (memory) on the router from 32MB to 64 or 128 MB.
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plsit

ASKER

Very good.  Thanks!
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Routers

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