Dialer Interface
gojericho0
Member Posts: 1,059 ■■■□□□□□□□
in CCNP
After a long break from studying...mostly because of lazyness 
I'm finally getting back to my ISCW studies.
Can anyone explain to me what the purpose or solution dialer interfaces provide? I'm trying to figure out why its necesarry or what advantage one would have with seperating a physical and logical interfaces only to tie them back together with a dialer pool?
Why not just assign the logical dialer configuration to the physical interface?
I know there must me an advantage of doing it this way, but i'm not sure what it would be. If someone could elaborate or give me a pratical example of its usefulness that would be great!
I'm finally getting back to my ISCW studies.
Can anyone explain to me what the purpose or solution dialer interfaces provide? I'm trying to figure out why its necesarry or what advantage one would have with seperating a physical and logical interfaces only to tie them back together with a dialer pool?
Why not just assign the logical dialer configuration to the physical interface?
I know there must me an advantage of doing it this way, but i'm not sure what it would be. If someone could elaborate or give me a pratical example of its usefulness that would be great!
Comments
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dynamik
Banned Posts: 12,312 ■■■■■■■■■□
Welcome back, slacker! I was just thinking what a long time it's been since you posted last
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Turgon
Banned Posts: 6,308 ■■■■■■■■■□
gojericho0 wrote: »After a long break from studying...mostly because of lazyness
I'm finally getting back to my ISCW studies.
Can anyone explain to me what the purpose or solution dialer interfaces provide? I'm trying to figure out why its necesarry or what advantage one would have with seperating a physical and logical interfaces only to tie them back together with a dialer pool?
Why not just assign the logical dialer configuration to the physical interface?
I know there must me an advantage of doing it this way, but i'm not sure what it would be. If someone could elaborate or give me a pratical example of its usefulness that would be great!
Dialer interface is a nice feature if you have a PRI that receives and makes calls to and from different locations with different subnets. With legacy you could have a main IP address under the interface with several secondary addresses. This could work but it would give you problems when using a routing protocol. If you tried to add a secondary network to the routing protocol it wouldn't work because the physical interface always uses its primary address when sending out a packet.
Dialer interfaces solve the primary IP/secondary IP quandary because each dialer interface can have its own primary IP address and you dont then need dialer map commands -
joshgibson82
Member Posts: 80 ■■□□□□□□□□
dialer interface is a nice feature if you have a pri that receives and makes calls to and from different locations with different subnets. With legacy you could have a main ip address under the interface with several secondary addresses. This could work but it would give you problems when using a routing protocol. If you tried to add a secondary network to the routing protocol it wouldn't work because the physical interface always uses its primary address when sending out a packet.
Dialer interfaces solve the primary ip/secondary ip quandary because each dialer interface can have its own primary ip address and you dont then need dialer map commands
great answer!Josh, CCNP CWNA -
gojericho0
Member Posts: 1,059 ■■■□□□□□□□
ok, one more questions. What is the difference/benefits between dialer interfaces and virtual templates?
you gonna answer my 
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