destination-pattern $

[Tobivan_Helden_2]

Gents,

Anybody knows what is the real sense of the 'Dollar sign' value for destionation-pattern command on Cisco IOS gateways ?

Documentation, i've found recently, tells, that

1. "Dollar sign ($), which matches the null string at the end of the input string."

2. Dollar sign ($)-Disables variable-length matching. Must be

used at the end of the dial string.

Will it be matched, if i put single $ in the destination-pattern value ?

[foster]

Hi Tobivan Helden

There is no string with $.

[Tobivan_Helden_2]

I have pots dial-peer that is extremely greedy and matched a lot of incoming calls to the cisco access server

dial-peer voice 1 pots

destination-pattern $

direct-inward-dial

port 3/0:D

When I change '$' to 'T' or to '.T' it is aslo matched. In fact there is no problem at all.

I just want to know, how does '$' pattern work ?

[Zin.Karzazi]

Lets say you have two Dialpeer:

dial-peer voice 100 pots

destination-pattern 9000

preference 0

dial-peer voice 200 pots

destination-pattern 9000$

preference 2

In this Exampel dial peer 200 will be used to route to 9000. When u use the $ at the end, it doesnt matter if the preference is higher than dial peer 100, routing will always choose the one with the "$".

Hope this helps

Zin-Elabidine Karzazi

[Tobivan_Helden_2]

Zin.Karzazi,

Thanks for your explanation, I didn't know it before. Nevertheless, i've got 2 questions else:

1. In what cases this algorithm can be useful ? I mean what is the necessity should be, we have to use '$' to override dial-peer selection by preference ?

2. Going back to my example:

dial-peer voice 1 pots

destination-pattern $

port 3/0:D

direct-inward-dial

Why such a peer is matched against inbound call coming from E1. As I'm concerned, destination-pattern will use ANI value to match against pattern. Let me explain my question by example:

***

Let's say, I have 2 (two) pots dial-peers:

dial-peer voice 1 pots

destination-pattern $

direct-inward-dial

port 3/0:D

dial-peer voice 2 pots

destination-pattern 5551212

direct-inward-dial

forward-digits all

***

The following is the inbound call from PRI link to that IOS gw

Dec 14 13:23:48.386: ISDN Se3/0:15 Q931: RX <- SETUP pd = 8 callref =

0x041E

Sending Complete

Bearer Capability i = 0x8090A3

Standard = CCITT

Transfer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0xE183838B

Preferred, Interface 3, Channel 11

Progress Ind i = 0x8183 - Origination address is non-ISDN

Calling Party Number i = 0x2180, '5551212'

Plan:ISDN, Type:National

Called Party Number i = 0x91, '87771010'

Plan:ISDN, Type:International

***

while the call is active, i check its status

#sh voice call status | i 7771010

CallID CID ccVdb Port DSP/Ch Called # Codec Dial-peers

0x89D649 906 0x64010798 3/0:D.4 2000/2 7771010 g729r8 1/1111

***

as you can see, the call is matched against 1 pots.

The question is WHY

[Tobivan_Helden_2]

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