From: Brad Ellis (brad@ccbootcamp.com)
Date: Wed Nov 29 2006 - 20:37:51 ART
Yup, that's what my guess is too. From what he was saying, he was running
into an IP address issue, not a skinny port issue. That's a whole nutha
topic. :)
thanks,
Brad Ellis
CCIE#5796 (R&S / Security)
CCSI#30482
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----- Original Message -----
From: "Haas, Brad" <bhaas@netinfosys.com>
To: "Vincent Mashburn" <vmashburn@fedex.com>; "Andi Bennett"
<bigandibennett@yahoo.com>; <ccielab@groupstudy.com>
Sent: Wednesday, November 29, 2006 2:13 PM
Subject: RE: OT - CallManager and NAT
> Here is more on that...
>
> Looks like you may also need to specify your CCM using dns rather than
> the ip.
>
>
>
> Cisco's Skinny Client Control Protocol (SCCP) * Release 12.1(5)T
>
>
>
> * Cisco IP Phone to Cisco Call Manager protocol
>
>
>
> * To specify a port other than the default port, on which the CCM is
> listening for skinny messages use the following command in global
> configuration mode:
>
>
>
> Router(config)# ip nat service skinny tcp port number
>
>
>
> * SCCP client to CCM typically flows from "inside" to "outside", where
> the Cisco Call Manager (CCM) is on the "inside" (behind the NAT device)
> DNS should be used to resolve the CCM IP address to connect to.
>
>
>
> * Cisco IOS NAT supports translation of DNS A and PRT records
>
>
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Vincent Mashburn
> Sent: Wednesday, November 29, 2006 1:55 PM
> To: Andi Bennett; ccielab@groupstudy.com
> Subject: RE: OT - CallManager and NAT
>
>
>
> You can configure NAT to translate the IP address in the SCCP payload by
>
> using the following:
>
>
>
> Ip nat service skinny tcp port 2000
>
>
>
> Vince Mashburn
>
> Sr. Voice / Data Engineer
>
> 901-263-5072
>
> CCVP, CCNP
>
> Cisco IP Telephony Support Specialist
>
> Cisco IP Telephony Operations Specialist
>
>
>
> -----Original Message-----
>
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
>
> Andi Bennett
>
> Sent: Wednesday, November 29, 2006 10:50 AM
>
> To: ccielab@groupstudy.com
>
> Subject: OT - CallManager and NAT
>
>
>
> Sorry for the off topic here but this has me a bit stumped.
>
>
>
> I have Cisco IP
>
> Phones on the "outside " of the network connecting to a CM on the
>
> "inside" of
>
> the network.
>
> Now, the phones can alternate TFTP to the CM, they then get an
>
> image, but they the try and connect to the real addresses of the CM's,
>
> which
>
> is obviously unroutable on the outside.
>
>
>
> I have
>
>
>
> ip nat outisde source static
>
> configured to get the phones to the CM. I think the problem is that the
>
> return TFTP image has the embedded real addresses of the CM in it.
>
>
>
> as a run
>
> down of config I have
>
>
>
> ip nat outside source static 10.18.192.10 172.27.10.1
>
> (Publisher + TFTP server)
>
> ip nat outside source static 10.18.192.11
>
> 172.27.10.2 (CM1)
>
> ip nat outside source static 10.18.192.12 172.27.10.3 (CM2)
>
> The phones get the image, then keep trying to connect tot he 10.18.192.x
>
> addresses
>
>
>
> I've looked at using the ip nat service port sccp command, but it
>
> seems to have no effect as the phones still try to connect to the real
>
> CM
>
> addresses, not my staic NAT entries.
>
>
>
> Is what I'm trying to do possible, or am
>
> I barking up the wrong tree??
>
>
>
> Any advice would be appreciated.
>
>
>
> Cheers
>
> Andy.
>
>
>
>
>
>
>
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