From: Denton Bobeldyk (denny@xxxxxxxxxxxxxx)
Date: Wed Sep 29 1999 - 09:44:04 GMT-3
According to the CMTD (Configuring, Monitoring and Troubleshooting Dialup)
Cisco Course manual:
dialer in-band - Enables DDR on this (asynchronous) interface
from ACRC:
dialer in-band:
Enables DDR on an interface
Not required by native ISDN BRI
Required for sync or async interfaces
dialer in-band : "This command (in-band) says that the same interface that is
used to
send the data must also perform call setup and teardown operation between the
router and an external dialing device such as a modem. If using asynchronous
interfaces or V.25bis on synchronous interfaces, you need to enable the router
to perfrom dialing on the interface. V.25bis is an ITU-T standard for in-band
signaling to bit-synchronous DCE devices. A variety of devices support V.25
bis, ranging from analog V.32 modems to ISDN terminal adapters.
Do not use this command if using BRI b/c out-of-band means that another
channel, in this case the D channel, performs call setup and teardown."
Hope that helps :)
-Denny
Vaughan Lee wrote:
> I did once manage to get snapshot routing working using a dialer interface
> using dialer maps and dialer in-band, but only in conjunction with a rotary
> group, which can probably be regarded as cheating! I have the config
> available still if anyone is desperate enough to want it, though it should
> be fairly easy to work out if you start by configuring for rotary groups.
>
> My understanding of the dialer in-band command is that it specifies if the
> connection is to be established over the link that will be used to carry
> data e.g. you are instructing the modem or whatever via the data channel to
> establish a call. In the case of an analogue line this is the case, but
> with ISDN there is a separate channel (the D channel) that is used to
> establish the connection, the data being carried over the B channel, so
> dialer in-band is not required.
>
> Hope that helps a bit.
>
> Regards,
> Vaughan
>
> Vaughan Lee, Network Specialist.
> debis IT Services (UK) Ltd.
> E-mail: vaughan.lee@debis.co.uk
> Direct Phone: 01908 279561
> Direct Fax: 01908 279061
> http://www.debis.co.uk/
>
> -----Original Message-----
> From: Chad Marsh [mailto:chad@wa.net]
> Sent: 29 September 1999 09:28
> To: CCIE Lab; Cisco
> Subject: Re: More Dialer stuff
>
> Correction, after further study, it appears the mutually exclusive
> commands on the dialer interface are 'dialer remote-name' and 'dialer
> map'. If you set a remote name, you can no longer use 'dialer map'(which
> is required for snapshot), you can only set a dialer string.
> But, if you do specify a 'dialer remote-name' first, you cannot enter
> 'dialer in-band', you get that error '%Remove the dialer profile first'
> You can enter 'dialer in-band', then enter 'dialer remote-name', but at
> that point you can't enter dialer maps, so I guess that doesn't do any
> good anyway.
>
> So what exactly does 'dialer in-band' do anyway?
> CCO says:
> dialer in-band
> To specify that dial-on-demand routing (DDR) is to be supported, use the
> dialer in-band interface configuration command. To disable DDR for the
> interface, use the no form of this command.
>
> But that doesn't make any sense, I can setup DDR with dialer profiles
> using dialer pools, and without using 'dialer in-band' and it works just
> fine.
>
> Chad Marsh
>
> >
> > It appears that the 'dialer in-band' and 'dialer remote-name' commands
> > are mutually exclusive on the Dialer interface.
> > I have this working with rotary-groups, not sure if it would work with
> > dialer pools, maybe I'll try that next.
> > But the bottom line is that it DOES work.
> > I just got it working, here are some relevant outputs and portions of
> > the configs:
> >
> > Chad Marsh
> >
> > R5#sho snap
> > Dialer1 is up, line protocol is upSnapshot client
> > Options: dialer support
> > Length of active period: 5 minutes
> > Length of quiet period: 8 minutes
> > Length of retry period: 8 minutes
> > For dialer address 1
> > Current state: active, remaining/exchange time: 4/2 minutes
> > Connected dialer interface:
> > BRI0:1
> > Updates received this cycle: ip
> >
> > R6#sho snap
> > Dialer1 is up, line protocol is upSnapshot server
> > Options: dialer support
> > Length of active period: 5 minutes
> > For ip address: 172.16.1.5
> > Current state: active, remaining time: 3 minutes
> > Connected dialer interface:
> > BRI0:1
> >
> > R5#sh ru
> > Building configuration...
> >
> > Current configuration:
> > !
> > hostname R5
> > !
> > !
> > username R6 password 0 ccie
> > isdn switch-type basic-dms100
> > !
> > interface Loopback0
> > ip address 10.5.1.1 255.255.255.0
> > !
> > interface BRI0
> > no ip address
> > encapsulation ppp
> > isdn spid1 20649906240101 4990624
> > isdn spid2 20649906250101 4990625
> > dialer rotary-group 1
> > no cdp enable
> > !
> > interface Dialer1
> > ip address 172.16.1.5 255.255.255.0
> > encapsulation ppp
> > dialer in-band
> > dialer in-band
> > dialer map snapshot 1 4990622
> > dialer map ip 172.16.1.6 name R6 broadcast 4990622
> > dialer-group 1
> > snapshot client 5 8 dialer
> > no cdp enable
> > ppp authentication chap
> > !
> > router rip
> > network 10.0.0.0
> > network 172.16.0.0
> > !
> > ip classless
> > !
> > dialer-list 1 protocol ip permit
> > !
> > R5#
> >
> > R6#sho run
> > Building configuration...
> >
> > Current configuration:
> > !
> > hostname R6
> > !
> > !
> > username R5 password 0 ccie
> > isdn switch-type basic-dms100
> > !
> > interface Loopback0
> > ip address 20.6.1.1 255.255.255.0
> > !
> > interface BRI0
> > no ip address
> > encapsulation ppp
> > isdn spid1 20649906220101 4990622
> > isdn spid2 20649906230101 4990623
> > dialer rotary-group 1
> > no cdp enable
> > !
> > interface Dialer1
> > ip address 172.16.1.6 255.255.255.0
> > encapsulation ppp
> > dialer in-band
> > dialer idle-timeout 30
> > dialer map ip 172.16.1.5 name R5 broadcast 4990624
> > dialer-group 1
> > snapshot server 5 dialer
> > no cdp enable
> > ppp authentication chap
> > !
> > router rip
> > network 10.0.0.0
> > network 172.16.0.0
> > !
> > ip classless
> > !
> > dialer-list 1 protocol ip permit
> > !
> > R6#
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