Transcript S6C5 – Dialer Profiles

S6C5 – Dialer Profiles
Chapter Outline
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5.1 Legacy DDR
5.1.1 Legacy DDR with a single destination
5.1.2 Legacy DDR with multiple destinations
5.1.3 Rotary groups overview
5.1.4 Using rotary groups
5.1.5 Configuring rotary groups
5.1.6 Configuring ISDN for dialer rotary groups
5.1.7 Asynchronous interface groups
5.1.8 Legacy DDR limitations
5.2 Dialer Profiles
5.2.1 Overview of dialer profiles
5.2.2 Configuring dialer profiles
5.2.3 Dialer pools
5.2.4 Placing calls with dialer profiles
5.2.5 Receiving calls with dialer profiles
5.2.6 Using dialer profiles with ISDN B channels
5.2.7 Dialer map class
Legacy DDR Has Support For
• Frame Relay
• The International Organization for Standardization
Connectionless Network Service (ISO CLNS)
• The Link Access Procedure Balanced (LAPB)
protocol
• Snapshot routing
• All routed protocols that are supported on Cisco
routers.
• BAD NEWS IS: legacy DDR's limitations can
adversely affect growth.
DDR Limitations
• Locks a physical interface into one
configuration.
– For example, DDR BRI0 can have only one Internet
Protocol (IP) address, one encapsulation type, and
one set of dialer timers.
• Legacy DDR configuration uses dialer map
statements
– The Basic Rate Interface (BRI) can only dial
multiple hosts but must use same Point-to-Point
Protocol (PPP) and dialer idle-timeout values when
connected
Alternative: DDR with dialer profiles
Dialer Interfaces
• Allows you to propagate an interface
configuration to multiple interfaces
– Interface dialer 0
• Int bri 0
– Dialer rotary-group 1
• Int bri 1
– Dialer rotary-group 2
• Physical interfaces inherit the dialer
interface configuration parameters.
Hunt Groups
• Incoming calls use first number in group of
numbers that is available
• Used for customer access numbers
• Can also be used for outgoing calls
– Console line can’t be part of a rotary group
Commands
• Dialer int 0
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Ip address 123.23.2.1 255.255.0.0 secondary
IP address 142.1.2.1
255.255.0.0
No ip directed broadcast
Dialer in-band
Dialer idle-timeout 180
Dialer fast-idle 80
Dialer-map ip 122.1.1.1 name Godzila 1132222
Dialer-group 2
PPP authentication chap
Configuring ISDN for Dialer
Interface
• A physical interface can belong to only one dialer
rotary group
• Dialer rotary-group command can be used with
any dial-up interface
– async, BRI, PRI, and serial.
• Some of the configuration may still have to
perform on the physical interface
– separate SPIDs will have to be entered at each of the
physicalBRI interfaces.
• Ask your provider for one phone number to be
used as a hunt group
– Using one number requires only one set of dialer map
Asynchronous Interface
Command
• Configures a "group" interface.
• Can configure the group interface to include
multiple asynchronous interfaces as
members.
• Router (config)#interface group-async
• Router (config-if)# group-range 1 8
– Note: Interfaces can’t be configured separately
Dialer Profiles
• Dialer profiles separate the logical configuration
from the interface that receives or makes calls
– Defines encapsulation
– Access control lists (ACLs)
– Turns features on/off
• Logical and physical configurations are
dynamically bound to each other on a per-call
basis
• Physical interface can be used by multiple dialer
interfaces
Configuring Dialer Profiles
• When using dialer profiles, the IOS will not allow
configuring the dialer interface with a dialer map
command
– Dialer map command maps the phone number to an IP
address and identifies the remote host's name for the
purposes of CHAP or PAP authentication
• Use the dialer string command with dialer profiles
– (config-if)#Dialer-string stringnumber
– (config-if)# Dialer remote-name username
• Physical interface can belong to many pools
Dialer Profiles Allow
• You can configure B channels of an ISDN
interface with different IP subnets or IPX
networks.
• You can use different encapsulations on B
channels of an ISDN interface.
• You can set different DDR parameters for B
channels of an ISDN interface.
• You can optimize the use of available ISDN B
channels by letting ISDN BRIs belong to multiple
dialer pools.