From: Mustafa M Bayramov (spyroot@azeronline.com)
Date: Thu Sep 04 2003 - 17:16:25 GMT-3
Jonathan
The good rule do more specify matching before less specific matching
form Voice.
dial-peer voice 1 voip
destination-pattern 12
session target ipv4:10.0.0.1
!
dial-peer voice 2 voip
destination-pattern 1
session target ipv4:20.0.0.2
The same rule is applicable to Call Manager.
( Note: for MQC is applicable too ( match more specific ( udp/tcp ) then
IP)
Regards
Mustafa M Bayramov
CISSP
CCNP,CCDP,Cisco Security Specialist
Network engineer and security analyst
"I know nothing except the fact of my ignorance." Socrates
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Brian McGahan
Sent: Thursday, September 04, 2003 8:18 PM
To: 'Jonathan V Hays'; 'Brian Dennis'; 'Alec'
Cc: ccielab@groupstudy.com
Subject: RE: Destination pattern symbols
Jonathan,
It's not necessarily contradictory; it's just not what you'd
normally expect. Like in IP routing, dial-peer matching will prefer a
more specific match over a default, but as soon as specific match is
made after the default, call setup is performed. If you have the
following dial-peers:
dial-peer voice 1 voip
destination-pattern 1
session target ipv4:10.0.0.1
!
dial-peer voice 2 voip
destination-pattern .
session target ipv4:20.0.0.2
and you dial anything that starts with a 1, you'll always match
dial-peer 1.
If you have the following peers:
dial-peer voice 1 voip
destination-pattern 1
session target ipv4:10.0.0.1
!
dial-peer voice 2 voip
destination-pattern 12
session target ipv4:20.0.0.2
and you dial anything that starts with a 1, you'll always match
dial-peer 1, since as soon as the match is made, call setup is
performed.
I wouldn't necessarily worry about how the csim start command
works, since it's only used for testing. You should be more concerned
about how dialing from an actual phone works. After all, the CCIE lab
is meant to test the practical application of these technologies, right?
;)
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-334-8987
Direct: 708-362-1418 (Outside the US and Canada)
-----Original Message-----
From: Jonathan V Hays [mailto:jhays@jtan.com]
Sent: Thursday, September 04, 2003 10:23 AM
To: 'Brian Dennis'; 'Alec'; bmcgahan@internetworkexpert.com
Cc: ccielab@groupstudy.com
Subject: RE: Destination pattern symbols
So, you are saying that the CSIM Start emulation does not match the
behavior of a real phone!?
Hmm. From Brian Dennis' output below it sort of looks like the phone is
doing a "shortest match"!? Well, that is similar to how a POTS phone
works: once you have dialed your 7 digits for a local call, the phone
system ignores any additional digits punched in. And according to your
example, once the VOIP router gets a "1" from the phone it has a match
and uses dial-peer 1.
On the surface this seems to contradict what Brian McGahan was saying
earlier in this thread about the *longer* match for destination patterns
being preferred. Evidently that is only true for CSIM Start? Or only
true for a choice between a 'real' phone number and a wildcard pattern?
Please clarify.
Does the order of the dial-peer statements makes a difference (like it
does in an access list)? Suppose the order were reversed. Would the
phone then match dial-peer 1 for the "12" pattern?
dial-peer voice 1 voip
destination-pattern 12
session target ipv4:10.0.0.1
!
dial-peer voice 2 voip
destination-pattern 1
session target ipv4:10.0.0.1
Obviously voice is not my strong point ....
Jonathan
!-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Brian Dennis
Sent: Thursday, September 04, 2003 12:07 AM
To: 'Alec'
Cc: ccielab@groupstudy.com
Subject: RE: Destination pattern symbols
Alec,
Here is how they would match.
CSIM Start
1) "1" - dial-peer 1
2) "12" - dial-peer 2
3) "123" - dial-peer 2
Phone
1) "1" - dial-peer 1
2) "12" - dial-peer 1
3) "123" - dial-peer 1
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
Toll Free: 877-334-8987
Direct: 775-745-6404 (Outside the US and Canada)
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Alec
Sent: Wednesday, September 03, 2003 8:14 PM
To: Brian McGahan; 'Paul Chen'; ccielab@groupstudy.com
Subject: Re: Destination pattern symbols
thanks Brian. If I have the following dial-peer voice command, which
one
will be used after I pressed
1) "1"
2) "12"
3) "123"
in a real phone and csim ? Thanks.
dial-peer voice 1 voip
destination-pattern 1
session target ipv4:10.0.0.1
!
dial-peer voice 2 voip
destination-pattern 12
session target ipv4:10.0.0.1
!
dial-peer voice 3 voip
destination-pattern .
session target ipv4:20.0.0.2
!
dial-peer voice 4 voip
destination-pattern .T
session target ipv4:20.0.0.2
----- Original Message -----
From: "Brian McGahan" <bmcgahan@internetworkexpert.com>
To: "'Alec'" <clapun@graduate.hku.hk>; "'Paul Chen'"
<cpjchen@starhub.net.sg>; <ccielab@groupstudy.com>
Sent: Thursday, September 04, 2003 2:20 AM
Subject: RE: Destination pattern symbols
> Alec,
>
> It will only match a single character then. As soon as the
> single character is input, the router will do call setup. This will
not
> be true for the 'csim start' command though, since the string is sent
> all at once. From an actual phone though, the string is sent 1
> character at a time.
>
> HTH
>
> Brian McGahan, CCIE #8593
> bmcgahan@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com
> Toll Free: 877-334-8987
> Direct: 708-362-1418 (Outside the US and Canada)
>
>
> -----Original Message-----
> From: Alec [mailto:clapun@graduate.hku.hk]
> Sent: Wednesday, September 03, 2003 10:24 AM
> To: Brian McGahan; 'Paul Chen'; ccielab@groupstudy.com
> Subject: Re: Destination pattern symbols
>
> So what if I use destination-pattern . for voice default route ?
What's
> the
> difference with .T ?
>
> ----- Original Message -----
> From: "Brian McGahan" <bmcgahan@internetworkexpert.com>
> To: "'Paul Chen'" <cpjchen@starhub.net.sg>; <ccielab@groupstudy.com>
> Sent: Wednesday, September 03, 2003 4:22 PM
> Subject: RE: Destination pattern symbols
>
>
> > Paul,
> >
> > T actually means interdigit timeout. The default interdigit
> > timeout is 10 seconds. Each time you dial a digit, the router is
> going
> > to wait 10 seconds before doing call setup. After 10 seconds have
> > expired, the router assumes that what you have entered so far is the
> > complete dial string, and does call setup on those digits. You can
> > modify the interdigit timeout with the voice-port command 'timeouts
> > inter-digit'.
> >
> > The combination of the . (any single character) and the T (wait
> > for additional characters) effectively defines a default route for
> > voice.
> >
> >
> > HTH,
> >
> > Brian McGahan, CCIE #8593
> > bmcgahan@internetworkexpert.com
> >
> > Internetwork Expert, Inc.
> > http://www.InternetworkExpert.com
> > Toll Free: 877-334-8987
> > Direct: 708-362-1418 (Outside the US and Canada)
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
> > Paul Chen
> > Sent: Wednesday, September 03, 2003 3:05 AM
> > To: ccielab@groupstudy.com
> > Subject: Destination pattern symbols
> >
> > Hi,
> >
> >
> >
> > Could someone please explain to me what these symbols mean:
> >
> >
> >
> > Destination-pattern .T
> >
> >
> >
> > A dot implies a single character right ?
> >
> >
> >
> > The T symbol implies a variable length dial string.
> >
> >
> >
> > Does the combination of the 2 symbols mean dial any number ?
> >
> >
> >
> > Thanks.
> >
> > Paul
> >
> >
> >
>
This archive was generated by hypermail 2.1.4 : Wed Oct 01 2003 - 07:24:23 GMT-3