Route pattern preference

Answered Question
Nov 9th, 2011
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Hi Guys,


I have a query which has been bothering me. Following are the details,


There are 2 route patterns,


1) 0.00! --> This one points to gateway 10.57.10.7

2) 0.00! --> This one points to gateway 10.57.10.8


Now if a user makes a call which matches the pattern, then,


1) which pattern will the CCM choose (since both are same) ?

2) will the CCM load balance between the 2 patterns ?



Thanks & Regards,

Achilleus

Correct Answer by iptuser55 about 5 years 9 months ago

following on



I think you are getting confused across two different bits of CUCM features


Partition order


This only happens if you have two identify DN, Route Patterns, and Translations etc with different Partitions


RP 9.01! Partition PT_PSTN>>>>>Route List PSTN

RP 9.01! Partition PT_WAN>>>>>Route List WAN


User CSS contains both Partitions in the following order


PT_PSTN

PT_WAN



Now a user dials 9.01!, CUCM will select both RP`s but will make use oft he higher ordered Partition in this case PT-PSTN.

The order of Partition was important and an example was with IPMA where the normal route was via the CTI Manager control , if the CTI manage failed then the second Partition was used to bypass IMPA and send the call to a P.A- Basically the order provided a fail over path before Call Forward Not Registered or Call Forward no Coverage was available


Now if you wanted to have an order external links but only have a single RP and a single Partition , you now make use of t the RL setting


Circular , top down etc which can be used to alternatively route the same call to different Route Groups

Correct Answer by acampbell about 5 years 9 months ago

Hi,


Well at least you have cleared up the similar route pattern descriptions.

You can NOT have 2 route patterns with exactly the same parameters like pattern & patition


So what you have is 2 similar patterens.


They are in different partitions.


They are access via Calling search space CSS


Even igf the user has a CSS with both the route pattern partitions in it we still

have ORDERED search


The ORDER is TOP DOWN through the CSS


Eg.


Route 0.00! in parttion BOB

Route 0.00! in parttion SUE

Route 0.00! in parttion JOE


Css - NAMES

partition BOB

partition SUE

partition JOE


Then the search for the matching pattern will stop at the 1st match BOB


In this instance the SUE & JOE routes will not be used.


Where we normally see similar route patterns is for site specific routes


Route 0.00! in parttion SITE-A

Route 0.00! in parttion SITE-B

Route 0.00! in parttion SITE-C


Css - SITE-A

partition SITE-A

Css - SITE-B

partition SITE-B

Css - SITE-C

partition SITE-C



HTH

Alex


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acampbell Wed, 11/09/2011 - 07:49
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Hi,


Are you sure these patterns are identical.

Are the partitions not different


Regards

Alex

Jaime Valencia Wed, 11/09/2011 - 08:12
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    2011

If both partitons from each RP are in the CSS the one that has a higher position will be used, otherwise if you only have one partition from those RPs that will be the choice.


This is the only scenario on which the order of the partitions in a CSS matters.

There won't be load balancing, you'll always just use one, assuming you can reach both.



HTH


java


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amit.paids Thu, 11/10/2011 - 06:06
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Hey Java,


I am not sure about the partition. I'll have to check when i reach office. Although i didnt' understand the second half of what you said. May it will make more sense to me when i take a look at the patterns. Will keep u posted.


Thanks for the reply though.


Regards,

Achilleus

amit.paids Thu, 11/10/2011 - 22:04
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Hi Java,


All though the patterns are same, their partitions are  different. But i am still confused, about what CSS are you referring to?


Regards,

amit

amit.paids Thu, 11/10/2011 - 06:04
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Hey acampbell,


I am not sure about the partition. I'll have to check when i reach office. WIll let u know.


Thanks for the reply though.


Regards,

Achilleus

amit.paids Thu, 11/10/2011 - 22:02
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Hi Alex,


All though the patterns are same, their partitions are different. But i am still confused, how will the CCM prioritize between these 2 patterns?


-Regards,

amit

Correct Answer
acampbell Fri, 11/11/2011 - 01:52
User Badges:
  • Green, 3000 points or more

Hi,


Well at least you have cleared up the similar route pattern descriptions.

You can NOT have 2 route patterns with exactly the same parameters like pattern & patition


So what you have is 2 similar patterens.


They are in different partitions.


They are access via Calling search space CSS


Even igf the user has a CSS with both the route pattern partitions in it we still

have ORDERED search


The ORDER is TOP DOWN through the CSS


Eg.


Route 0.00! in parttion BOB

Route 0.00! in parttion SUE

Route 0.00! in parttion JOE


Css - NAMES

partition BOB

partition SUE

partition JOE


Then the search for the matching pattern will stop at the 1st match BOB


In this instance the SUE & JOE routes will not be used.


Where we normally see similar route patterns is for site specific routes


Route 0.00! in parttion SITE-A

Route 0.00! in parttion SITE-B

Route 0.00! in parttion SITE-C


Css - SITE-A

partition SITE-A

Css - SITE-B

partition SITE-B

Css - SITE-C

partition SITE-C



HTH

Alex


Please rate useful posts

Correct Answer
iptuser55 Fri, 11/11/2011 - 04:45
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following on



I think you are getting confused across two different bits of CUCM features


Partition order


This only happens if you have two identify DN, Route Patterns, and Translations etc with different Partitions


RP 9.01! Partition PT_PSTN>>>>>Route List PSTN

RP 9.01! Partition PT_WAN>>>>>Route List WAN


User CSS contains both Partitions in the following order


PT_PSTN

PT_WAN



Now a user dials 9.01!, CUCM will select both RP`s but will make use oft he higher ordered Partition in this case PT-PSTN.

The order of Partition was important and an example was with IPMA where the normal route was via the CTI Manager control , if the CTI manage failed then the second Partition was used to bypass IMPA and send the call to a P.A- Basically the order provided a fail over path before Call Forward Not Registered or Call Forward no Coverage was available


Now if you wanted to have an order external links but only have a single RP and a single Partition , you now make use of t the RL setting


Circular , top down etc which can be used to alternatively route the same call to different Route Groups

amit.paids Sun, 02/26/2012 - 09:08
User Badges:

Thanks for the answers guys. Now i get what you all were trying to explain all along. Lemme summarize what i have understood,


1) There cant exist 2 identical patterns with same partition. They have to be in a different partition.

2) Which pattern will be choosen by the CCM when a number is dialed, depends upon the phone/device CSS.

3) If the CSS contains, the 2 identical patterns then the order takes preference.



Now that i look back, i dont believe that i couldn't understand it.


P.S.: Sorry for the delayed response.

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